US20080104913A1 - Lightweight Concrete Wall Panel With Metallic Studs - Google Patents
Lightweight Concrete Wall Panel With Metallic Studs Download PDFInfo
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- US20080104913A1 US20080104913A1 US11/773,911 US77391107A US2008104913A1 US 20080104913 A1 US20080104913 A1 US 20080104913A1 US 77391107 A US77391107 A US 77391107A US 2008104913 A1 US2008104913 A1 US 2008104913A1
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- Prior art keywords
- wall panel
- foam block
- foam
- wall
- exterior layer
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/38—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure with attached ribs, flanges, or the like, e.g. framed panels
- E04C2/384—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure with attached ribs, flanges, or the like, e.g. framed panels with a metal frame
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
- E04C2/288—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material
Definitions
- the present invention relates to building components, and more specifically low density concrete wall panels that are manufactured in a controlled environment and can be selectively interconnected on-site to fabricate modular buildings.
- wall panels are situated in locations where it is desirable to have openings to accommodate cables, pipes and the like.
- wall panels were cast so as to include any necessary openings that require careful planning and design, thus increasing costs.
- wall panels were cast without such openings and the required openings were formed after casting, e.g. by sawing, drilling, or similar procedures.
- Such post-casting procedures for example cutting through thick and/or steel-reinforced panels are labor-intensive and expensive.
- wall panels of the prior art are generally lightweight, durable, and can be manufactured with readily available material.
- the wall panels of the prior art usually employ a thickened exterior wall of concrete that is internally supported by a framework of metal, i.e. “re-bar”.
- the thickness of the exterior wall and the presence of metallic reinforcement makes the wall panel difficult to modify during construction. It should be noted that previous attempts to fabricate thin shell wall panels have resulted in walls with reduced load carrying capacity, but for most low level residential structures the load carrying capability of thin shelled wall panels may be adequate.
- the exterior walls of buildings often include various types of siding that can be mounted directly to the building structure (i.e. framing).
- the siding protects the buildings from rain, wind, snow, etc. which in turn can cause damage to the framing and other elements of the building.
- a building may include wood siding, plastic siding, metal siding, or composite siding, etc.
- the siding while meant to protect the interior of the building from the elements, is often itself susceptible to deterioration from the elements.
- a common type of siding is corrugated metal siding because of the wide array of design options it provides. This corrugated metal siding, however, is susceptible to rusting which can present an unsightly appearance along with allowing moisture and wind to penetrate into the interior of the building.
- inventions of the present invention are comprised of a plurality of lightweight foam insulative blocks separated by metal studs.
- the metal studs provide sufficient compressive strength to the wall panel.
- a layer of lightweight concrete is employed on one side of the insulative foam blocks to provide a surface that is resistant to heat, cold, wind, water and other natural conditions.
- the wall panel as provided herein is contemplated to become an exterior of a building.
- the wall panel as disclosed herein is ideal for interior walls of a building.
- the insulative foam blocks provide thermal isolation between the metal components of the wall and the concrete components of the wall. In addition, the insulation provides an excellent barrier from the outside elements.
- the insulation panels in accordance with embodiments of the present invention provide added structural support for the thin layer of concrete, which allows for the omission of reinforcing bar structures that are generally embedded in the concrete wall panels of the prior art. More specifically, in the past, thicker external walls were required to provide sufficient structural support. Since wall panels as described herein employ insulation panels that carry some of the load, a reinforcing bar substructure is not required. That is, by utilizing foam blocks positioned between the metallic studs, a great degree of surface area is provided for which a thin concrete layer can bond, thereby allowing the omission of the reinforcing bar structure generally embedded in the wall structure and which allows for thinner, lighter wall section.
- the exterior wall of embodiments of the present invention is made of high performance or lightweight concrete.
- the concrete may be comprised partially of sand expanded perlite or the like for aggregate with polyvinyl acelate (PVA) fiber embedded therein.
- PVA polyvinyl acelate
- Concrete of this type allows for the incorporation of fasteners, such as nails and screws and allows the wall panel to be cut like wood, which translates to flexibility in the construction of residential buildings.
- the concrete layer be easily modified to accept any number of interior and exterior textures, surfaces or cladding materials. More specifically, the present invention is capable of being finished with stucco, siding, brick, drywall or other type of interior or exterior surface finish.
- exterior claddings of bricks or stones may be employed into the casting when the wall panel is being fabricated thereby yielding a finished exterior facade.
- the exterior layer may comprise SHEETCRETETM by Oldcastle Precast, Inc.” or glasscrete as an alternative material to concrete.
- inventions of the present invention include at least one utility conduit that is positioned at least partially within the wall panel for the receipt of substantially any type of utility line which may be required in residential or commercial construction.
- Utility conduits integrated into the wall panels may be oriented in one or more directions are generally positioned in the insulation panels near the interior surface of the wall panel.
- portions of the metallic studs that are situated away from the concrete exterior wall may be used to accept dry wall, or wood strips that are used to interconnect dry wall or other types of interior surface material.
- a layer of dens armor, traditional gypsum, drywall, or other building material may be placed in the fixture during fabrication to yield a wall panel with a completed interior wall.
- a layer of “sheet crete” or other gypsum or cementious material as disclosed in U.S. provisional patent application 60/741,487, entitled “Lightweight Structural Concrete With Properties Similar to Wood” may be employed to form the interior faces of the wall panel.
- the finished product is fire resistant, substantially maintenance free, mold resistant, insect proof, wind resistant and projectile resistant.
- a fire and smoke resistant surface may be affixed to the interior and exterior walls or the insulative foam itself.
- the use of insulation provides a wall panel that is insulated, and one embodiment having an enhanced resistance to heat flow (R-value). Further, with proper treatment of the concrete, the wall panel is substantially water resistant.
- the wall panel will have sufficient rigidity and structural strength to allow for the interconnection of hardware such as screws, bolts, etc. Without requiring the location of a stud. Thus cabinets, pictures and other interior items may be hung directly from hardware penetrating the wall panel.
- FIG. 1 It is still yet another aspect of the present invention to provide a wall panel that has a substantially joint free internal surface.
- embodiments of the present invention utilize a concrete like internal surface thereby yielding an internal wall having substantially no joints.
- the wall panel is provided that does not require further post direction finishing to prepare drywall, for example.
- previous wall panels similar to those described herein may have included wood strips or other surfaces for drywall nails, a feature no longer required.
- wood or other materials may be integrated in the wall to provide an interface for wood framing if so desired.
- wall panels of the prior art generally require the use of clips that are permanently attached to the metal studs that interface with the layer of concrete. Since the concrete layer of embodiments of the present invention is substantially thinner than those previously used, fewer clips are required because the majority of structural support of the concrete wall panel is provided by the insulation foam blocks.
- embodiments of the present invention utilize a plurality of clips interconnected to the metal studs along the height thereof. During fabrication, the clips are inserted into the still wet concrete wherein curing of the concrete permanently affixes the exterior wall onto the metal studs. Nylon cladding is used on the clips in one embodiment to minimize the heat transfer between the concrete wall and the metal stud. Since the clips are a secondary attachment mechanism, fewer clips are needed to interconnect the exterior wall to the metal studs. This unique modification reduces the number of thermal transmission points between the concrete and metal frame, thus improving the thermal efficiency of the wall panel.
- a bonding material may additionally be used.
- the bonding of the insulation panels to the exterior wall also provides additional structural support of the exterior wall.
- Some embodiments of the present invention thus employ a primer coat onto the exterior wall after it is initially placed.
- This primer coat may be PVA or acrylic resin.
- the bonding coat is cementious that includes portland cement, flyash and super plasticizer.
- emulsion polymer or a moisture cured urethane may be used to ensure fast and easy application.
- these materials are applied to the exterior wall by a roller or a spray. Bonding may be used on all surfaces of the metal stud as well to ensure that the sides of the insulation panel are affixed securely thereto.
- the clips may be coated with some sort of bonding material to enhance their interconnection with the exterior wall.
- a lightweight wall panel that provides a building facade for the exterior of a building.
- wall panels of some embodiments of the present invention include a lightweight foam insulative block with embedded studs.
- the studs provide compressive strength to the wall panel.
- the studs comprise metal studs.
- ordinary artisans will realize that other materials, such as composite materials or plastic for instance, can be utilized to construct the studs.
- a layer of lightweight concrete (see discussion of concrete supra) is employed on one side of the insulative foam block to provide a surface that is resistant to heat, cold, wind, water and other natural conditions.
- multiple wall panels can be connected together in an end-to-end relationship to provide a facade of a desired width for a building. More specifically, one end of a wall panel may be provided with a cutout allowing a portion of a stud to protrude therefrom. Additionally, one end of an adjacent wall panel may be provided with a bracket protruding therefrom. Thereafter, the bracket may be connected to protruding portion of the stud so as to mount the wall panels together in an end-to-end relationship. Ordinary artisans will realize that the bracket can be connected to the protruding portion of the stud in multiple ways, including, but not limited to, welding, riveting, a threaded connection, etc. While the wall panel as provided herein is contemplated to become an exterior of a building, one skilled in the art will appreciate that the wall panel as disclosed herein is ideal for interior walls of a building.
- a lightweight wall panel that includes a foam block with a plurality of embedded studs for providing compressive strength to the panel.
- the studs are preferably C-shaped metal studs that substantially extend from a front surface to a back surface of the foam block.
- ordinary artisans will realize that studs of various other shapes and materials or studs that do not extend the entire length of the foam block can be utilized.
- the foam block is formed with reinforcement therein, it is placed on top of a not yet cured layer of lightweight concrete in order to form the lightweight wall panel.
- various types of fasteners can be inserted into the foam block and into the stud (via a threaded connection, interference fit, etc) so that the foam block can be placed on top of the uncured concrete or other exterior layer wherein the fasteners are inserted into the uncured concrete or other exterior layer. Thereafter, once the exterior layer fully cures, the foam block will be more rigidly connected to the exterior layer due to its mechanical bond with the fasteners.
- a second layer of concrete or other material can be placed or otherwise formed on the side of the foam block opposite from the first layer of concrete or other material. To aid in the bonding strength of the foam block to the second layer, bores can be formed through the foam block and a portion of the studs.
- Embodiments of the present invention thus include foam blocks and studs with bores along with the aforementioned fasteners that provide a more robust and durable wall panel.
- buildings can be retrofitted by mounting the lightweight wall panels of the present invention directly onto the exterior of the building or by removing exterior layers of the building and then mounting the wall panels of the present invention onto desired sections of the building.
- the concrete may include color additives to provide for a wall of a desired appearance.
- methods known in the art can be used to create the impression of bricks or other shapes in the layer of concrete or other material.
- a low density concrete wall panel comprising:
- an exterior layer comprised of at least one of a cementious or gypsum based material
- each foam block having an upper end, a lower end and two lateral sides extending therebetween wherein one lateral side further comprises a lip extending therefrom that defines a space between adjacent foam blocks;
- a low density wall panel comprising:
- a first exterior layer comprised of at least one of a cementious or gypsum based material
- foam block positioned on the first exterior layer, the foam block having a front surface and a rear surface, the front surface being in contact with the first exterior layer;
- each stud includes first and second portions, the first portion being adjacent the front surface of the foam block and the second portion being generally opposite the first portion;
- At least one fastener extending into the foam block and the first exterior layer.
- FIG. 1 is a top perspective view of a wall panel of one embodiment of the present invention
- FIG. 2 is a top perspective view of a foam insulation block of one embodiment of the present invention.
- FIG. 3 is a top perspective view of a metal frame employed in embodiments of the present invention.
- FIG. 4 is a partial detailed perspective view of the embodiment shown in FIG. 1 ;
- FIG. 5 is a partial bottom plan view of the embodiment of the present invention shown in FIG. 1 ;
- FIG. 6 is a variation of the embodiment of FIG. 1 illustrating a series of bores to aid in attachment of a second layer of concrete or other material;
- FIG. 7 is a top plan view of a wall panel of another embodiment of the present invention.
- FIG. 8 is a partial top plan view illustrating the end-to-end interconnection of two wall panels according to another embodiment of the present invention.
- FIG. 9 is a partial top plan view of a wall panel of another embodiment of the present invention.
- a lightweight wall panel 2 that includes a plurality of metal studs 6 that receive foam insulation blocks 10 positioned therebetween.
- the foam blocks 10 used in the present invention are generally rectangular with an upper surface 14 , a lower surface 18 and two lateral side surfaces 22 .
- an interior 26 and exterior surface 30 is provided.
- at least one lateral side surface has a lip 34 depending therefrom that generally extends the exterior surface 30 .
- the lip 34 is adapted to receive the metallic stud 6 and separates the metallic stud 6 from a layer of lightweight concrete material 38 that is affixed to the exterior surface 30 of the foam block.
- Wall panels 2 as contemplated herein also may include insulative strips 42 adjacent to a lower surface 18 and an upper surface 14 of the foam blocks 10 that provide a location for the interconnection of a channel 46 that also interconnects to upper 50 and lower 54 edges of the metallic studs 6 .
- the channel 46 provides a location wherein air, utility, or fluid conduits may be situated.
- some foam blocks 10 of the wall panel 2 may include at least one passage 58 for the receipt of conduits for receiving electrical wiring, piping, etc. as well. In order to allow the conduits to traverse the entire width of the wall panel, one skilled in the art will appreciate that apertures 62 may also be included into the metal studs 6 .
- the wall panel 2 is comprised generally of an exterior wall 38 of a lightweight concrete material. After the concrete material is placed, a plurality of foam blocks 10 are positioned thereon. As the exterior wall 38 cures, the foam blocks 10 will adhere thereto. To enhance adherence of the foam blocks to the exterior wall, dovetails or other shaped cutouts may be made into the surface of the foam block in any location and in any direction that contacts the exterior wall 38 . Such cutouts will allow a portion of the exterior wall 38 to flow into the cutout before the exterior wall 38 is fully cured thus increasing the aforementioned adherence once the exterior wall 38 is fully cured.
- the foam blocks 10 may include a lip 34 that receives the metal studs 6 that effectively separate the foam blocks 10 .
- the metal studs 6 may be comprised of a c-channel or a solid piece of metal depending on the required strength of the wall panel 2 .
- the upper surface and the lower surface of the foam blocks 10 do not entirely match the height of the exterior wall 38 thereby providing a gap that separates the foam blocks 10 from a metal channel 46 that spans between the ends of the metal studs 6 .
- foam strips 42 are added adjacent to the upper surface and the lower surface 54 of the foam blocks 10 that receive a portion of the channel 46 and the metal studs 6 .
- Exterior walls 38 of embodiments of the present invention are created of a lightweight concrete.
- the metal studs 6 may also include stud apertures 62 that provide access to passages 58 built into the foam block 10 .
- a plurality of passages 58 may further be aligned to incorporate conduit through the width of the wall panel 10 .
- the channel 46 which is positioned at the top edge and the bottom edge of the wall may be used for conduit as well. Further, if c-channels are utilized for the metallic studs, an air space is also provided that is useful for the transition of conduit therethrough.
- the channel may also have apertures 64 that allow access to the space provided by the metallic studs 6 .
- the foam block 10 of one embodiment of the present invention is provided. More specifically, the foam block 10 includes the upper surface 14 , the lower surface 18 and two lateral surfaces 22 extending therebetween. In addition, an interior surface 26 and an exterior surface 30 is provided. A lip 34 extends from at least one lateral surface 22 that provides a location for the positioning of the metal stud. This lip 34 performs a double function by providing the required spacing between two adjacent foam blocks 10 and providing a pad that receives the metal stud so that it does not contact the concrete exterior surface limiting undesirable heat transfer.
- the foam blocks 10 of some embodiments of the present invention include at least one passage 58 forwarded therethrough for the receipt of conduit. Although the passage 58 in FIG. 2 is shown to extend horizontally, one skilled in the art will appreciate that any shape or angulation or orientation of the passage 58 may be used without departing from the scope of the invention.
- the frame system 68 is comprised of a plurality of spaced metal studs 6 wherein the upper edge 50 and lower edge 54 thereof are interconnected to a channel 46 .
- a plurality of clips 72 are provided that are interconnected to the metal studs 6 .
- the clips 72 are preferably coated with nylon or other insulative material thereby limiting the amount of heat transferred between the metal studs 6 and the concrete wall.
- the insulation panels provide additional structural support to the exterior concrete wall, the amount of clips 72 required in many embodiments of the present invention are significantly reduced, thus further ensuring that some thermal expansion issues are alleviated.
- the channel 46 may be affixed to the metal studs 6 in any way previously used in the art, such as welding, riveting, screwing, nailing, bonding, to name a few.
- FIG. 4 a cut away view of one embodiment of the present invention is shown.
- a layer of lightweight concrete 38 is placed then in a form, preferably to a depth of about 11 ⁇ 2 to 1 inch in thickness.
- a plurality of foam blocks 10 are located in the form wherein the lips 34 of the foam blocks 10 are abutted against the adjacent foam blocks 10 to provide a space for the receipt of metal studs 6 .
- the metal studs 6 which may include the clips 72 interconnected thereto, is then placed on the lip 34 wherein the metal clip 72 includes a portion that penetrates into the still wet and uncured concrete 38 or other wall material.
- the clip 72 is of such a thickness that it can fit easily between any gap provided between the metal stud 6 and the foam block 10 situated next to the metal stud 6 .
- a foam strip Prior to placing the metal studs 6 , a foam strip is placed adjacent to the upper and lower surfaces 18 of the foam block 10 over an exposed section of lightweight concrete 38 . This small overlap allows the channel 46 to be interconnected to the edges 54 of the metal studs 6 that provide a space between the upper and lower surfaces 18 of the foam block 10 and the channel 46 .
- the channels 46 provide an excellent location for the positioning of wiring, piping, etc. And to provide an insulative air barrier.
- FIG. 5 a front elevation view of one embodiment of the present invention is shown.
- This figure illustrates the spacing of the metal stud 6 with respect to the layer of lightweight concrete 38 . It also shows that when a C-shaped metallic stud 6 is used, an air barrier and channel is provided that provides a location for conduits.
- Embodiments of the present invention may use adhesives 76 to secure portions of the metal stud 6 onto the foam blocks 10 that are situated adjacent thereto.
- adhesives may be employed onto the layer of concrete 38 prior to placing the foam blocks 10 thereon thereby ensuring a tighter bond.
- FIG. 6 a variation of the embodiment of FIG. 1 is shown whereby a second layer of concrete or other material can effectively be placed onto the foam block opposite from the first layer of concrete or other material.
- bores 80 are formed through a portion of the studs and into the foam block.
- a portion of the second layer will flow into the bores 80 .
- the second layer will be more effectively bonded to the wall panel due to the second layer curing within the bores 80 of the foam block and the studs.
- a lightweight wall panel 102 that includes a foam insulation block 110 with a plurality of studs 106 embedded therein.
- the foam block includes a front surface 114 , a rear surface 118 , a first end 119 , a second end 120 , and a length, and can comprise any number of materials including, but not limited to, expanded polystyrene (EPS), expanded polystyrene (XPS), polyurethane, etc.
- EPS expanded polystyrene
- XPS expanded polystyrene
- polyurethane etc.
- Each stud 106 is metal and includes first and second portions 107 , 108 that are respectively situated near the front and rear surfaces 114 , 118 of the foam block.
- each stud 106 comprises a z-shaped channel.
- ordinary artisans will recognize that other shapes such as c-shaped channels or other shaped channels can be utilized depending on the required strength of the wall panel 102 .
- each stud will preferably extend from the top to the bottom of the foam block 110 , multiple studs can be utilized from the top to the bottom of the foam block instead of a just a single stud 106 . Further, the studs 106 are preferably equally spaced along the length of the foam block.
- At least one first fastener 122 is mounted to the front surface 114 of the foam block and the first portion 107 of the stud 106 .
- the first fastener 122 is mounted to the front surface 114 and the first portion 107 via a threaded connection, an interference fit, etc.
- Each first fastener 122 includes a portion 126 that protrudes from the front surface 114 of the foam block 110 .
- the first fastener 122 may comprise a screw, bolt, nail, etc., among others, and may further include a head portion 130 for reasons that will be described below.
- each wall panel 102 also includes an exterior wall 146 constructed of, for instance, a lightweight concrete material.
- an exterior wall 146 constructed of, for instance, a lightweight concrete material.
- other lightweight materials such as SHEETCRETETM by Oldcastle Precast, Inc. and glasscrete can also be utilized.
- Each exterior wall 146 is mounted on the front surface 114 of the wall panel 102 .
- the protruding portion 126 of each first fastener 122 is pressed into the exterior wall 142 until the front surface 114 of the foam block 110 abuts the exterior wall 146 .
- a cutout or cutouts can be provided on the front surface 214 of the foam block to interact with the concrete or other material. These cutouts can be provided in any location and in any direction along the front surface of the foam block.
- FIG. 8 an end-to-end interconnection between two of the wall panels 102 of one embodiment is shown. More specifically, a cutout 134 is formed on the first end 119 of the foam block 110 of a first wall panel 102 thus exposing the second portion 108 of a stud 106 .
- the second portion 108 of the stud 106 may be provided with an aperture 143 for receiving a second fastener 142 as will be described below.
- the second end 120 of a second wall panel 102 includes a bracket 138 with a portion 139 protruding from the second end 120 mounted adjacent to the second portion 108 of a stud 106 .
- bracket 138 can be mounted to the second end 120 in various ways, such as by curing the foam around the bracket, a threaded connection, gluing, etc. Additionally, the bracket 138 may include an aperture 140 for reasons that will be described below.
- two wall panels 102 are interconnected in an end-to-end relationship by initially placing the first end 119 of a first wall panel 102 adjacent to the second end 120 of a second wall panel 102 such that the protruding portion 139 is located in the cutout 134 . Thereafter, the aperture 143 of the second portion 108 of the stud 106 of the first wall panel 102 and the aperture 140 of the bracket 138 of the second wall panel 102 are aligned and a second fastener 143 is inserted therethrough to rigidly interconnect the first and second wall panels 102 .
- the second fastener 143 is threaded such that after the fastener 143 is placed through the apertures 143 , 140 , the fastener 143 is threaded into the siding of a building thus mounting the wall panels to the building.
- various other interconnection schemes can be used such as nailing, riveting, welding, etc.
- brackets, second fasteners, etc. can be used to provide a desired rigidity between the panels themselves and/or desired rigidity between the panels and the exterior of a building.
- the first and second wall panels 102 are shown to be in a collinear arrangement in FIG. 8 , it is contemplated that the first and second wall panels 102 could be interconnected such that the first wall panel is arranged at an angle to the second wall panel.
- FIG. 8 a a variation of the end-to-end interconnection between two adjacent wall panels 102 is shown. More specifically, the second portion 108 of a stud 106 protrudes from a first wall panel 102 adjacent the first end 119 of first wall panel 102 . The second portion 108 of a stud 106 protrudes from a second wall panel 102 adjacent the second end 120 of the second wall panel 102 .
- the second portions 108 of the studs 106 of the first and second wall panels are brought into contact at an overlapping region 150 . Thereafter, the second portions are rigidly connected at the overlapping region 150 by any method known in the art, such as, but not limited to, welding, a threaded connection, clamping, etc.
- FIG. 8 b another variation of the end-to-end interconnection between two adjacent wall panels 102 is shown. More specifically, the second portion 108 of a stud 106 protrudes from a first wall panel 102 adjacent the first end 119 of first wall panel 102 . The second portion 108 of a stud 106 protrudes from a second wall panel 102 adjacent the second end 120 of the second wall panel 102 . In operation, the second portions 108 of the studs 106 of the first and second wall panels are brought into contact at an overlapping region 150 . Thereafter, a bracket 138 is provided for providing additional support to the overlapping region 150 .
- fasteners 154 are provided for rigidly interconnecting the second portions 108 of the studs and the bracket 138 .
- a washer 158 can be provided to fill in any gaps that exist between the bracket 138 and the second portions 108 of the studs 106 as shown in FIG. 8 b. It will be appreciated that while the aforementioned connection arrangements have been illustrated to rigidly interconnect two adjacent wall panels 102 , others known to ordinary artisans are contemplated as being within the scope of the present invention.
- a method of a manufacturing the wall panel of FIGS. 7 and 8 will now be described. Initially, a mold is provided for curing of the foam blocks. After a plurality of studs are placed in the mold at desired locations, a foam solution is introduced into the mold and allowed to cool and/or cure. After curing, the foam block is removed and if desired, cut into appropriate lengths. Once the foam block has been produced, a form for producing an exterior wall 146 is provided on-site or prefabricated of a shape and size corresponding to the foam block.
- each first fastener 122 of the foam block 110 is pressed into the concrete or other material until the front surface 114 of the foam block 110 abuts the concrete or other material and the concrete or other material flows into in provided cutouts on the front surface 114 . Thereafter, once the concrete or other material has fully cured around the protruding portion 126 of each first fastener 122 and within the cutouts, the exterior wall 146 will be rigidly mounted to the front surface 114 of the foam block 110 . As previously described, if a head portion 130 is provided on the first fastener 122 , additional rigidity can be provided between the exterior wall 146 and the foam block 110 due to the concrete curing around the head portion 130 .
- a lightweight wall panel 202 that includes a foam insulation block 210 with a plurality of studs 206 embedded therein.
- the foam block includes front and rear surfaces 114 , 118 and can comprise any number of materials including, but not limited to, expanded polystyrene (EPS), expanded polystyrene (XPS), polyurethane, etc.
- Each stud 206 is metal and includes first and second portions 207 , 208 that are respectively situated near the front and rear surfaces 214 , 218 of the foam block.
- each stud 206 comprises a c-shaped channel.
- each stud 206 will generally extend from the top to the bottom of the foam block 210 , ordinary artisans will appreciate that multiple studs can be utilized from the top to the bottom of the foam block instead of a just a single stud 206 . Further, the studs 206 are preferably equally spaced along the length of the foam block. However, it is recognized that other spacings between studs may be required depending upon the desired design requirements.
- At least one first fastener 222 is mounted to the front surface 214 of the foam block 210 as well the first portion 207 of one of the studs 206 .
- Each first fastener 222 includes a head 226 , an abutment portion 230 , and a protruding portion 234 .
- the protruding portion 234 is inserted into front surface 214 and aperture 209 of first portion 207 until the abutment portion 234 abuts the front surface 214 . It is appreciated that the first fastener 222 can be mounted to the front surface 214 and first portion 207 via a threaded connection, an interference fit, etc.
- fasteners of varied shapes can be provided.
- at least one second fastener 238 is mounted to the front surface 214 of the foam block 210 as well as the first portion 207 of another one of the studs 206 .
- Each second fastener 238 includes a head 242 and a protruding portion 246 .
- the protruding portion 246 is inserted into front surface 214 and aperture 209 of first portion 207 such that the head 242 remains separated from the front surface.
- the second fastener 238 can be mounted to the front surface 214 and first portion 207 via a threaded connection, an interference fit, etc.
- At least one third fastener 250 is mounted to the front surface 214 of the foam block 210 as well as the first portion 207 of another one of the studs 206 .
- Each third fastener 250 includes a bridge portion 254 and a pair of legs 258 . The legs 258 are inserted into front surface 214 and apertures 209 of first portion 207 such that the bridge portion 254 remains separated from the front surface.
- each wall panel 202 also includes an exterior wall 270 constructed of, for instance, a lightweight concrete material.
- exterior wall 270 constructed of, for instance, a lightweight concrete material.
- other lightweight materials such as SHEETCRETETM by Oldcastle Precast, Inc. and glasscrete can also be utilized.
- the head portion 226 , head portion 242 and bridge portion 254 of first, second and third fasteners 222 , 238 , 250 respectively are pressed into the exterior wall 270 until the front surface 214 of the foam block 210 abuts the exterior wall 270 .
- the front surface 214 of the foam block is provided with a cutout 278 , such as a dovetail-shaped cutout, to interact with the concrete or other material. It will be appreciated that more than one cutout can be provided, and also that the cutout(s) can be provided any location and in any direction along the front surface of the foam block. Thereafter, once the concrete or other material has fully cured around the head portion 226 , head portion 242 and bridge portion 254 , and within the cutout 278 , the exterior wall 270 will be rigidly mounted to the front surface 214 of the foam block 210 .
- a cutout 278 such as a dovetail-shaped cutout
- a second layer of concrete or other material 274 can be provided on the foam block 210 opposite from the exterior wall 270 .
- bores 262 , 266 can be formed through the foam block and a portion of the studs.
- a portion of the concrete or other material will flow into the bores 262 , 266 .
- additional bores can be formed through the foam block and not through the studs for flowing of the uncured second layer.
- the method of manufacturing the wall panel of FIG. 9 is similar to the method of manufacturing the wall panel of FIG. 7 and 8 .
- any of the aforementioned fasteners can be utilized in any of the embodiments to aid in bonding of the foam block to the concrete or other material.
- only a single type of the aforementioned fasteners can be used throughout the wall panel if desired.
- dovetails, bores or other cutouts can be formed in any locations and in any directions in the foam block and the studs to allow for flowing of the concrete or other material into the dovetails, bores or other cutouts. This increases the bonding strength between the foam block and the concrete or other material as well as enhances the crack resistance of the wall panel.
- second layers of concrete or other material can be formed on the wall panels opposite from the first exterior layer or concrete or other material depending upon a user's specific design requirements.
Abstract
A wall panel is provided that is comprised of a plurality of spaced foam insulative blocks. Between each block is a metal stud that spans the height of the wall panel and provides sufficient strength to counteract any compressive loads the wall panel may encounter. The presence of the insulation panels provides large surface areas for the receipt of a thin layer of cementious or gypsum based material that is adapted to receive nails and be easily cut. In addition, the decreased weight of the exterior wall allows for the omission of reinforcing internal structure within the exterior wall which is found in the prior art, thereby providing a lightweight and easy to fabricate wall.
Description
- This application claims benefit of U.S. Provisional Application Ser. No. 60/806,598, filed Jul. 5, 2006, the entire disclosure of which is hereby incorporated by reference.
- This application is also related to pending U.S. patent application Ser. No. 11/122,792, filed May 4, 2005, which is a continuation-in-part of pending U.S. patent application Ser. No. 11/096,705, filed Apr. 1, 2005, which is a continuation-in-part of pending U.S. patent application Ser. No. 10/772,148, filed Feb. 3, 2004, now U.S. Pat. No. 7,100,336, which is a continuation-in-part of pending U.S. patent application Ser. No. 10/423,286, filed Apr. 24, 2003, now U.S. Pat. No. 6,898,908, which is a continuation-in-part of U.S. patent application Ser. No. 10/150,465, now U.S. Pat. No. 6,729,090, filed May 17, 2002, which is a continuation-in-part of U.S. patent application Ser. No. 10/093,292, now U.S. Pat. No. 6,701,683, filed Mar. 6, 2002. In addition, this application is related to U.S. patent application Ser. No. 11/121,267, filed May 2, 2005, to U.S. Provisional Patent Application Ser. No. 60/697,169, filed Jul. 6, 2005, and to U.S. Provisional Patent Application Ser. No. 60/741,487, filed Dec. 2, 2005 and Provisional Patent Application Ser. No. 60/744,736, filed Apr. 12, 2006. This application incorporates all of the applications and issued patents listed above by reference in their entirety herein.
- The present invention relates to building components, and more specifically low density concrete wall panels that are manufactured in a controlled environment and can be selectively interconnected on-site to fabricate modular buildings.
- Due to the high cost of traditional concrete components and the expensive transportation and labor costs associated therewith, there is a significant need in the construction industry to provide lightweight, precast, composite building panels that have superior strength and insulative properties. Previous attempts to provide these types of building panels have failed due to the expensive transportation costs and less than ideal insulative and thermal conductivity properties associated with prefabricated concrete wire- reinforced products. Further, due to the brittle nature of concrete, many of the previously used building panels are prone to cracks and other damage during transportation.
- The relatively large weight per square foot of building panels of the prior art has resulted in increased expenses arising not only from the amount of materials needed for fabrication, but also the cost of transporting and erecting the modules. Building panel weight also places effective limits on the height of structures, such as stacked modules e.g., due to load limitations of the building foundations, footings and/or lowermost modules. Furthermore, there is substantial fabrication labor expense that can arise from design, material, and labor costs associated with providing and integrating reinforcement materials. Accordingly, it would be useful to provide a wall panel system for modular construction that is relatively light, can be readily stacked to increased heights and, preferably, inexpensive to design, manufacture, transport and erect.
- In many situations, wall panels are situated in locations where it is desirable to have openings to accommodate cables, pipes and the like. In some previous approaches, wall panels were cast so as to include any necessary openings that require careful planning and design, thus increasing costs. In other approaches, wall panels were cast without such openings and the required openings were formed after casting, e.g. by sawing, drilling, or similar procedures. Such post-casting procedures, for example cutting through thick and/or steel-reinforced panels are labor-intensive and expensive. Further, in many processes for creating openings, there is a relatively high potential for cracking or splitting of the wall panel. Accordingly, it would be useful to provide wall panels wherein passageways for fluid, air, and/or electrical conduits may be cost effectively integrated in desired locations with a reduced potential for cracking or splitting.
- Many types of tilt-up pre-fabricated wall panels have been employed in the past. More specifically, wall panels of the prior art are generally lightweight, durable, and can be manufactured with readily available material. However, the wall panels of the prior art usually employ a thickened exterior wall of concrete that is internally supported by a framework of metal, i.e. “re-bar”. The thickness of the exterior wall and the presence of metallic reinforcement makes the wall panel difficult to modify during construction. It should be noted that previous attempts to fabricate thin shell wall panels have resulted in walls with reduced load carrying capacity, but for most low level residential structures the load carrying capability of thin shelled wall panels may be adequate.
- Additionally, the exterior walls of buildings often include various types of siding that can be mounted directly to the building structure (i.e. framing). The siding protects the buildings from rain, wind, snow, etc. which in turn can cause damage to the framing and other elements of the building. For instance, a building may include wood siding, plastic siding, metal siding, or composite siding, etc. However, the siding, while meant to protect the interior of the building from the elements, is often itself susceptible to deterioration from the elements. For instance, a common type of siding is corrugated metal siding because of the wide array of design options it provides. This corrugated metal siding, however, is susceptible to rusting which can present an unsightly appearance along with allowing moisture and wind to penetrate into the interior of the building. While using galvanized steel or other rust resistance metals can help prevent rust from forming, these are often not perfect solutions. Additionally, in the case of corrugated metal siding mounted to the building structure, the insulation located between the metal siding and the building structure is often compressed therebetween, thereby reducing the R-value of the insulation. Accordingly, it would be useful to provide an aesthetically pleasing lightweight facade that can be mounted to the siding of a building and which is capable of preventing moisture and other natural elements from penetrating the interior building structures. Further, it would be useful to provide a lightweight facade that maintains or enhances the insulative properties of the wall.
- Accordingly, there is a significant need in the construction and building industry to provide a selectively alterable composite building wall panels that may be used in modular construction that are lightweight, that provide superior strength and that have high insulative values. Further, a method of making these types of building panels is needed that is inexpensive, utilizes commonly known manufacturing equipment, and which can be used to mass produce building panels for use in the modular construction of warehouses, low cost permanent housing, hotels, and other buildings.
- It is one aspect of the present invention to provide a lightweight wall panel. More specifically, embodiments of the present invention are comprised of a plurality of lightweight foam insulative blocks separated by metal studs. The metal studs provide sufficient compressive strength to the wall panel. In addition, a layer of lightweight concrete is employed on one side of the insulative foam blocks to provide a surface that is resistant to heat, cold, wind, water and other natural conditions. The wall panel as provided herein is contemplated to become an exterior of a building. However, one skilled in the art will appreciate that the wall panel as disclosed herein is ideal for interior walls of a building. The insulative foam blocks provide thermal isolation between the metal components of the wall and the concrete components of the wall. In addition, the insulation provides an excellent barrier from the outside elements. Further, the insulation panels in accordance with embodiments of the present invention provide added structural support for the thin layer of concrete, which allows for the omission of reinforcing bar structures that are generally embedded in the concrete wall panels of the prior art. More specifically, in the past, thicker external walls were required to provide sufficient structural support. Since wall panels as described herein employ insulation panels that carry some of the load, a reinforcing bar substructure is not required. That is, by utilizing foam blocks positioned between the metallic studs, a great degree of surface area is provided for which a thin concrete layer can bond, thereby allowing the omission of the reinforcing bar structure generally embedded in the wall structure and which allows for thinner, lighter wall section.
- As briefly mentioned above, the exterior wall of embodiments of the present invention is made of high performance or lightweight concrete. For example, the concrete may be comprised partially of sand expanded perlite or the like for aggregate with polyvinyl acelate (PVA) fiber embedded therein. Concrete of this type allows for the incorporation of fasteners, such as nails and screws and allows the wall panel to be cut like wood, which translates to flexibility in the construction of residential buildings. It is also another aspect of the present invention that the concrete layer be easily modified to accept any number of interior and exterior textures, surfaces or cladding materials. More specifically, the present invention is capable of being finished with stucco, siding, brick, drywall or other type of interior or exterior surface finish. More importantly, exterior claddings of bricks or stones for example, may be employed into the casting when the wall panel is being fabricated thereby yielding a finished exterior facade. Additionally, the exterior layer may comprise SHEETCRETE™ by Oldcastle Precast, Inc.” or glasscrete as an alternative material to concrete.
- It is another aspect of the present invention to provide wall panels that can be employed to quickly and efficiently construct modular buildings and temporary shelters and is designed to be completely functional with regard to electrical wiring or other utilities such as telephone lines, etc. Thus embodiments of the present invention include at least one utility conduit that is positioned at least partially within the wall panel for the receipt of substantially any type of utility line which may be required in residential or commercial construction. Utility conduits integrated into the wall panels may be oriented in one or more directions are generally positioned in the insulation panels near the interior surface of the wall panel.
- It is yet another aspect of the present invention to provide a finished interior wall. As will be appreciated by one skilled in the art, portions of the metallic studs that are situated away from the concrete exterior wall may be used to accept dry wall, or wood strips that are used to interconnect dry wall or other types of interior surface material. Additionally, a layer of dens armor, traditional gypsum, drywall, or other building material may be placed in the fixture during fabrication to yield a wall panel with a completed interior wall. Preferably, a layer of “sheet crete” or other gypsum or cementious material as disclosed in U.S. provisional patent application 60/741,487, entitled “Lightweight Structural Concrete With Properties Similar to Wood” may be employed to form the interior faces of the wall panel. Therefore, since the exterior of the wall panel is substantially comprised of concrete based materials or metallic materials, the finished product is fire resistant, substantially maintenance free, mold resistant, insect proof, wind resistant and projectile resistant. To increase the fire and smoke resistance of the panel a fire and smoke resistant surface may be affixed to the interior and exterior walls or the insulative foam itself. In addition, the use of insulation provides a wall panel that is insulated, and one embodiment having an enhanced resistance to heat flow (R-value). Further, with proper treatment of the concrete, the wall panel is substantially water resistant.
- Further, it is another aspect of the present invention that the wall panel will have sufficient rigidity and structural strength to allow for the interconnection of hardware such as screws, bolts, etc. Without requiring the location of a stud. Thus cabinets, pictures and other interior items may be hung directly from hardware penetrating the wall panel.
- It is still yet another aspect of the present invention to provide a wall panel that has a substantially joint free internal surface. As briefly alluded to above, embodiments of the present invention utilize a concrete like internal surface thereby yielding an internal wall having substantially no joints. Thus the wall panel is provided that does not require further post direction finishing to prepare drywall, for example. Further, previous wall panels similar to those described herein may have included wood strips or other surfaces for drywall nails, a feature no longer required. However, one skilled in the art will appreciate that wood or other materials may be integrated in the wall to provide an interface for wood framing if so desired.
- It is another aspect of the present invention to provide a wall panel that is easy to construct. More specifically, wall panels of the prior art generally require the use of clips that are permanently attached to the metal studs that interface with the layer of concrete. Since the concrete layer of embodiments of the present invention is substantially thinner than those previously used, fewer clips are required because the majority of structural support of the concrete wall panel is provided by the insulation foam blocks. Thus embodiments of the present invention utilize a plurality of clips interconnected to the metal studs along the height thereof. During fabrication, the clips are inserted into the still wet concrete wherein curing of the concrete permanently affixes the exterior wall onto the metal studs. Nylon cladding is used on the clips in one embodiment to minimize the heat transfer between the concrete wall and the metal stud. Since the clips are a secondary attachment mechanism, fewer clips are needed to interconnect the exterior wall to the metal studs. This unique modification reduces the number of thermal transmission points between the concrete and metal frame, thus improving the thermal efficiency of the wall panel.
- In order to ensure that the concrete wall is affixed firmly to the metallic studs, a bonding material may additionally be used. The bonding of the insulation panels to the exterior wall also provides additional structural support of the exterior wall. Some embodiments of the present invention thus employ a primer coat onto the exterior wall after it is initially placed. This primer coat may be PVA or acrylic resin. Preferably, the bonding coat is cementious that includes portland cement, flyash and super plasticizer. Alternatively, and emulsion polymer or a moisture cured urethane may be used to ensure fast and easy application. Generally, these materials are applied to the exterior wall by a roller or a spray. Bonding may be used on all surfaces of the metal stud as well to ensure that the sides of the insulation panel are affixed securely thereto. Finally, the clips may be coated with some sort of bonding material to enhance their interconnection with the exterior wall.
- According to yet another aspect of the present invention, a lightweight wall panel is provided that provides a building facade for the exterior of a building. More specifically, wall panels of some embodiments of the present invention include a lightweight foam insulative block with embedded studs. The studs provide compressive strength to the wall panel. In one variation, the studs comprise metal studs. However, ordinary artisans will realize that other materials, such as composite materials or plastic for instance, can be utilized to construct the studs. In addition, a layer of lightweight concrete (see discussion of concrete supra) is employed on one side of the insulative foam block to provide a surface that is resistant to heat, cold, wind, water and other natural conditions. Further, multiple wall panels can be connected together in an end-to-end relationship to provide a facade of a desired width for a building. More specifically, one end of a wall panel may be provided with a cutout allowing a portion of a stud to protrude therefrom. Additionally, one end of an adjacent wall panel may be provided with a bracket protruding therefrom. Thereafter, the bracket may be connected to protruding portion of the stud so as to mount the wall panels together in an end-to-end relationship. Ordinary artisans will realize that the bracket can be connected to the protruding portion of the stud in multiple ways, including, but not limited to, welding, riveting, a threaded connection, etc. While the wall panel as provided herein is contemplated to become an exterior of a building, one skilled in the art will appreciate that the wall panel as disclosed herein is ideal for interior walls of a building.
- According to yet another aspect of the present invention, a lightweight wall panel is provided that includes a foam block with a plurality of embedded studs for providing compressive strength to the panel. The studs are preferably C-shaped metal studs that substantially extend from a front surface to a back surface of the foam block. However, ordinary artisans will realize that studs of various other shapes and materials or studs that do not extend the entire length of the foam block can be utilized. After the foam block is formed with reinforcement therein, it is placed on top of a not yet cured layer of lightweight concrete in order to form the lightweight wall panel. In one variation, various types of fasteners can be inserted into the foam block and into the stud (via a threaded connection, interference fit, etc) so that the foam block can be placed on top of the uncured concrete or other exterior layer wherein the fasteners are inserted into the uncured concrete or other exterior layer. Thereafter, once the exterior layer fully cures, the foam block will be more rigidly connected to the exterior layer due to its mechanical bond with the fasteners. Additionally, if desired, a second layer of concrete or other material can be placed or otherwise formed on the side of the foam block opposite from the first layer of concrete or other material. To aid in the bonding strength of the foam block to the second layer, bores can be formed through the foam block and a portion of the studs. Thereafter, as the second layer of concrete or other material is placed on top of the foam block, a portion of the concrete or other material will flow into the bores. As a result, after cure, a more rigid connection between the foam block and the second layer will exist. One of ordinary skill will understand that additional bores can be formed through the foam block and not through the studs for flowing of the uncured second layer. Embodiments of the present invention thus include foam blocks and studs with bores along with the aforementioned fasteners that provide a more robust and durable wall panel.
- It will be appreciated that shipping the wall panels of the present invention from the factory to the job site will be enhanced because of the low weight of the wall panels. Building erection at the job site will be enhanced for similar reasons. For instance, buildings can be retrofitted by mounting the lightweight wall panels of the present invention directly onto the exterior of the building or by removing exterior layers of the building and then mounting the wall panels of the present invention onto desired sections of the building.
- Moreover, those of ordinary skill in the art will recognize that the concrete may include color additives to provide for a wall of a desired appearance. Also, methods known in the art can be used to create the impression of bricks or other shapes in the layer of concrete or other material.
- Thus, in one embodiment of the present invention, a low density concrete wall panel is provided, comprising:
- an exterior layer comprised of at least one of a cementious or gypsum based material;
- a plurality of generally parallel spaced foam blocks positioned on said layer of cementious or gypsum based material, each foam block having an upper end, a lower end and two lateral sides extending therebetween wherein one lateral side further comprises a lip extending therefrom that defines a space between adjacent foam blocks;
- a plurality of metallic framing members each with an upper end and a lower end, at least one framing member of the plurality thereof positioned within the space between adjacent foam blocks;
- a first channel interconnected to said upper ends of said plurality of spaced metallic framing members; and
- a second channel interconnected to said lower ends of said plurality of spaced framing members.
- Further, in another embodiment of the present invention, a low density wall panel is provided, comprising:
- a first exterior layer comprised of at least one of a cementious or gypsum based material;
- a foam block positioned on the first exterior layer, the foam block having a front surface and a rear surface, the front surface being in contact with the first exterior layer;
- a plurality of studs embedded in the foam block, wherein each stud includes first and second portions, the first portion being adjacent the front surface of the foam block and the second portion being generally opposite the first portion; and
- at least one fastener extending into the foam block and the first exterior layer.
- The Summary of the Invention is neither intended nor should it be construed as being representative of the full extent and scope of the present invention. The present invention is set forth in various levels of detail in the Summary of the Invention as well as in the attached drawings and the Detailed Description of the Invention and no limitation as to the scope of the present invention is intended by either the inclusion or non-inclusion of elements, components, etc. in this Summary of the Invention. Additional aspects of the present invention will become more readily apparent from the Detail Description, particularly when taken together with the drawings.
- The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the general description of the invention given above and the detailed description of the drawings given below, serve to explain the principles of these inventions.
-
FIG. 1 is a top perspective view of a wall panel of one embodiment of the present invention; -
FIG. 2 is a top perspective view of a foam insulation block of one embodiment of the present invention; -
FIG. 3 is a top perspective view of a metal frame employed in embodiments of the present invention; -
FIG. 4 is a partial detailed perspective view of the embodiment shown inFIG. 1 ; -
FIG. 5 is a partial bottom plan view of the embodiment of the present invention shown inFIG. 1 ; -
FIG. 6 is a variation of the embodiment ofFIG. 1 illustrating a series of bores to aid in attachment of a second layer of concrete or other material; -
FIG. 7 is a top plan view of a wall panel of another embodiment of the present invention; -
FIG. 8 is a partial top plan view illustrating the end-to-end interconnection of two wall panels according to another embodiment of the present invention; -
FIG. 9 is a partial top plan view of a wall panel of another embodiment of the present invention. - To assist in interpreting the drawings, the following table is herein which identifies the various components of the present invention and the numbering associated therewith:
-
# Component 2 Wall panel 6 Metal stud 10 Foam block 14 Upper surface 18 Lower surface 22 Lateral surface 26 Interior surface 34 Lip 38 Exterior wall 46 Channel 50 Upper edge 54 Lower edge 58 Passage 62 Stud aperture 64 Channel apertures 68 Frame system 72 Clip 76 Adhesive 80 Bores 102 Wall panel 106 Stud 107 First portion 108 Second portion 110 Foam block 114 Front surface 118 Rear surface 119 First end 120 Second end 122 First fastener 126 Protruding portion 130 Head portion 134 Cutout 138 Bracket 139 Protruding portion 140 Aperture 142 Second fastener 143 Aperture 146 Exterior wall 150 Overlapping region 154 Fasteners 158 Washer 202 Wall panel 206 Stud 207 First portion 208 Second portion 209 Aperture 210 Foam block 214 Front surface 218 Rear surface 222 First fastener 226 Head 230 Abutting portion 234 Protruding portion 238 Second fastener 242 Head 246 Protruding portion 250 Third fastener 254 Bridge portion 258 Legs 262 Bore 266 Bore 270 Exterior layer 274 Second layer 278 Cutout - It should be understood that the drawings are not necessarily to scale. In certain instances, details that are not necessary for an understanding of the invention or that render other details difficult to perceive may have been omitted. It should be understood, of course, that the invention is not necessarily limited to the particular embodiments illustrated herein.
- Referring now to
FIGS. 1-5 , alightweight wall panel 2 is provided that includes a plurality ofmetal studs 6 that receive foam insulation blocks 10 positioned therebetween. The foam blocks 10 used in the present invention are generally rectangular with anupper surface 14, alower surface 18 and two lateral side surfaces 22. In addition, an interior 26 andexterior surface 30 is provided. Further, at least one lateral side surface has alip 34 depending therefrom that generally extends theexterior surface 30. Thelip 34 is adapted to receive themetallic stud 6 and separates themetallic stud 6 from a layer of lightweightconcrete material 38 that is affixed to theexterior surface 30 of the foam block.Wall panels 2 as contemplated herein also may includeinsulative strips 42 adjacent to alower surface 18 and anupper surface 14 of the foam blocks 10 that provide a location for the interconnection of achannel 46 that also interconnects to upper 50 and lower 54 edges of themetallic studs 6. Thechannel 46 provides a location wherein air, utility, or fluid conduits may be situated. Further, it is also contemplated that some foam blocks 10 of thewall panel 2 may include at least onepassage 58 for the receipt of conduits for receiving electrical wiring, piping, etc. as well. In order to allow the conduits to traverse the entire width of the wall panel, one skilled in the art will appreciate thatapertures 62 may also be included into themetal studs 6. - Referring now to
FIG. 1 thewall panel 2 of one embodiment of the present invention is provided herein. Thewall panel 2 is comprised generally of anexterior wall 38 of a lightweight concrete material. After the concrete material is placed, a plurality of foam blocks 10 are positioned thereon. As theexterior wall 38 cures, the foam blocks 10 will adhere thereto. To enhance adherence of the foam blocks to the exterior wall, dovetails or other shaped cutouts may be made into the surface of the foam block in any location and in any direction that contacts theexterior wall 38. Such cutouts will allow a portion of theexterior wall 38 to flow into the cutout before theexterior wall 38 is fully cured thus increasing the aforementioned adherence once theexterior wall 38 is fully cured. Other methods of securing the interior components of the wall will be described below. In addition, the foam blocks 10 may include alip 34 that receives themetal studs 6 that effectively separate the foam blocks 10. Themetal studs 6 may be comprised of a c-channel or a solid piece of metal depending on the required strength of thewall panel 2. In the illustrated embodiment, the upper surface and the lower surface of the foam blocks 10 do not entirely match the height of theexterior wall 38 thereby providing a gap that separates the foam blocks 10 from ametal channel 46 that spans between the ends of themetal studs 6. In addition, foam strips 42 are added adjacent to the upper surface and thelower surface 54 of the foam blocks 10 that receive a portion of thechannel 46 and themetal studs 6. These measures are taken such that themetal stud 6 is separated from the exterior wallconcrete material 38 which is important because each material has different expansion rates wherein quicker expansion of the metallic material may cause cracking of theexterior wall 38.Exterior walls 38 of embodiments of the present invention are created of a lightweight concrete. However, as alluded to above, one skilled in the art will appreciate the other materials, such as dry wall, SHEETCRETE™ by Oldcastle Precast, Inc., glasscrete, or other similar materials may be utilized without departing from the scope of the invention. Themetal studs 6 may also includestud apertures 62 that provide access topassages 58 built into thefoam block 10. A plurality ofpassages 58 may further be aligned to incorporate conduit through the width of thewall panel 10. In addition, thechannel 46, which is positioned at the top edge and the bottom edge of the wall may be used for conduit as well. Further, if c-channels are utilized for the metallic studs, an air space is also provided that is useful for the transition of conduit therethrough. The channel may also have apertures 64 that allow access to the space provided by themetallic studs 6. - Referring now to
FIG. 2 , thefoam block 10 of one embodiment of the present invention is provided. More specifically, thefoam block 10 includes theupper surface 14, thelower surface 18 and twolateral surfaces 22 extending therebetween. In addition, aninterior surface 26 and anexterior surface 30 is provided. Alip 34 extends from at least onelateral surface 22 that provides a location for the positioning of the metal stud. Thislip 34 performs a double function by providing the required spacing between two adjacent foam blocks 10 and providing a pad that receives the metal stud so that it does not contact the concrete exterior surface limiting undesirable heat transfer. The foam blocks 10 of some embodiments of the present invention include at least onepassage 58 forwarded therethrough for the receipt of conduit. Although thepassage 58 inFIG. 2 is shown to extend horizontally, one skilled in the art will appreciate that any shape or angulation or orientation of thepassage 58 may be used without departing from the scope of the invention. - Referring now to
FIG. 3 , aframe system 68 of one embodiment of the present invention is shown. More specifically, theframe system 68 is comprised of a plurality of spacedmetal studs 6 wherein theupper edge 50 andlower edge 54 thereof are interconnected to achannel 46. In addition, to ensure that themetal studs 6 are firmly interconnected to the concrete exterior wall, a plurality ofclips 72 are provided that are interconnected to themetal studs 6. Theclips 72 are preferably coated with nylon or other insulative material thereby limiting the amount of heat transferred between themetal studs 6 and the concrete wall. In addition, since the insulation panels provide additional structural support to the exterior concrete wall, the amount ofclips 72 required in many embodiments of the present invention are significantly reduced, thus further ensuring that some thermal expansion issues are alleviated. One skilled in the art will appreciate that thechannel 46 may be affixed to themetal studs 6 in any way previously used in the art, such as welding, riveting, screwing, nailing, bonding, to name a few. - Referring now to
FIG. 4 , a cut away view of one embodiment of the present invention is shown. Upon review of this figure, one skilled in the art will appreciate the method of manufacture ofwall panels 2 as contemplated herein. More specifically, initially a layer of lightweight concrete 38 is placed then in a form, preferably to a depth of about 1½ to 1 inch in thickness. Next, a plurality of foam blocks 10 are located in the form wherein thelips 34 of the foam blocks 10 are abutted against the adjacent foam blocks 10 to provide a space for the receipt ofmetal studs 6. Themetal studs 6, which may include theclips 72 interconnected thereto, is then placed on thelip 34 wherein themetal clip 72 includes a portion that penetrates into the still wet and uncured concrete 38 or other wall material. In addition, theclip 72 is of such a thickness that it can fit easily between any gap provided between themetal stud 6 and thefoam block 10 situated next to themetal stud 6. Prior to placing themetal studs 6, a foam strip is placed adjacent to the upper andlower surfaces 18 of thefoam block 10 over an exposed section oflightweight concrete 38. This small overlap allows thechannel 46 to be interconnected to theedges 54 of themetal studs 6 that provide a space between the upper andlower surfaces 18 of thefoam block 10 and thechannel 46. Thechannels 46 provide an excellent location for the positioning of wiring, piping, etc. And to provide an insulative air barrier. - Referring now to
FIG. 5 , a front elevation view of one embodiment of the present invention is shown. This figure illustrates the spacing of themetal stud 6 with respect to the layer oflightweight concrete 38. It also shows that when a C-shapedmetallic stud 6 is used, an air barrier and channel is provided that provides a location for conduits. Embodiments of the present invention may useadhesives 76 to secure portions of themetal stud 6 onto the foam blocks 10 that are situated adjacent thereto. In addition, as one skilled in the art will appreciate, adhesives may be employed onto the layer ofconcrete 38 prior to placing the foam blocks 10 thereon thereby ensuring a tighter bond. - With reference to
FIG. 6 , a variation of the embodiment ofFIG. 1 is shown whereby a second layer of concrete or other material can effectively be placed onto the foam block opposite from the first layer of concrete or other material. To aid in the attachment of the second layer to the wall panel, bores 80 are formed through a portion of the studs and into the foam block. As the second layer is being placed, a portion of the second layer will flow into thebores 80. Thereafter, once the second layer fully cures, the second layer will be more effectively bonded to the wall panel due to the second layer curing within thebores 80 of the foam block and the studs. - Referring now to
FIG. 7 and according to another embodiment of the present invention, alightweight wall panel 102 is provided that includes a foam insulation block 110 with a plurality ofstuds 106 embedded therein. The foam block includes afront surface 114, arear surface 118, afirst end 119, asecond end 120, and a length, and can comprise any number of materials including, but not limited to, expanded polystyrene (EPS), expanded polystyrene (XPS), polyurethane, etc. - Each
stud 106 is metal and includes first andsecond portions rear surfaces stud 106 comprises a z-shaped channel. However, ordinary artisans will recognize that other shapes such as c-shaped channels or other shaped channels can be utilized depending on the required strength of thewall panel 102. While each stud will preferably extend from the top to the bottom of the foam block 110, multiple studs can be utilized from the top to the bottom of the foam block instead of a just asingle stud 106. Further, thestuds 106 are preferably equally spaced along the length of the foam block. However, ordinary artisans will recognize that other spacings between studs may be required depending upon the desired design requirements. Further, at least onefirst fastener 122 is mounted to thefront surface 114 of the foam block and thefirst portion 107 of thestud 106. Thefirst fastener 122 is mounted to thefront surface 114 and thefirst portion 107 via a threaded connection, an interference fit, etc. Eachfirst fastener 122 includes aportion 126 that protrudes from thefront surface 114 of the foam block 110. Thefirst fastener 122 may comprise a screw, bolt, nail, etc., among others, and may further include ahead portion 130 for reasons that will be described below. - With continued reference to
FIG. 7 , eachwall panel 102 also includes anexterior wall 146 constructed of, for instance, a lightweight concrete material. However, one skilled in the art will appreciate that other lightweight materials such as SHEETCRETE™ by Oldcastle Precast, Inc. and glasscrete can also be utilized. Eachexterior wall 146 is mounted on thefront surface 114 of thewall panel 102. As will be described more fully below, before the material of theexterior wall 146 is fully cured, the protrudingportion 126 of eachfirst fastener 122 is pressed into theexterior wall 142 until thefront surface 114 of the foam block 110 abuts theexterior wall 146. It will be appreciated that a cutout or cutouts, such as but not limited to, dovetail cutouts, can be provided on thefront surface 214 of the foam block to interact with the concrete or other material. These cutouts can be provided in any location and in any direction along the front surface of the foam block. Thereafter, once the concrete has fully cured around the protrudingportion 126 of eachfirst fastener 122, and within the cutout(s), theexterior wall 146 will be rigidly mounted to thefront surface 114 of the foam block 110. Moreover, if ahead portion 130 is provided on thefirst fastener 122, additional rigidity can be provided between theexterior wall 146 and the foam block 110 due to the concrete curing around thehead portion 130. - Referring now to
FIG. 8 , an end-to-end interconnection between two of thewall panels 102 of one embodiment is shown. More specifically, acutout 134 is formed on thefirst end 119 of the foam block 110 of afirst wall panel 102 thus exposing thesecond portion 108 of astud 106. Thesecond portion 108 of thestud 106 may be provided with anaperture 143 for receiving asecond fastener 142 as will be described below. Thesecond end 120 of asecond wall panel 102 includes abracket 138 with aportion 139 protruding from thesecond end 120 mounted adjacent to thesecond portion 108 of astud 106. One skilled in the art will appreciate that thebracket 138 can be mounted to thesecond end 120 in various ways, such as by curing the foam around the bracket, a threaded connection, gluing, etc. Additionally, thebracket 138 may include an aperture 140 for reasons that will be described below. - In operation, two
wall panels 102 are interconnected in an end-to-end relationship by initially placing thefirst end 119 of afirst wall panel 102 adjacent to thesecond end 120 of asecond wall panel 102 such that the protrudingportion 139 is located in thecutout 134. Thereafter, theaperture 143 of thesecond portion 108 of thestud 106 of thefirst wall panel 102 and the aperture 140 of thebracket 138 of thesecond wall panel 102 are aligned and asecond fastener 143 is inserted therethrough to rigidly interconnect the first andsecond wall panels 102. Preferably, thesecond fastener 143 is threaded such that after thefastener 143 is placed through theapertures 143, 140, thefastener 143 is threaded into the siding of a building thus mounting the wall panels to the building. However, ordinary artisans will appreciate that various other interconnection schemes can be used such as nailing, riveting, welding, etc. Further, although only a single bracket, second fastener, etc. have been shown, it will be appreciated that multiple brackets, second fasteners, etc. can be used to provide a desired rigidity between the panels themselves and/or desired rigidity between the panels and the exterior of a building. Moreover, while the first andsecond wall panels 102 are shown to be in a collinear arrangement inFIG. 8 , it is contemplated that the first andsecond wall panels 102 could be interconnected such that the first wall panel is arranged at an angle to the second wall panel. - With respect to
FIG. 8 a, a variation of the end-to-end interconnection between twoadjacent wall panels 102 is shown. More specifically, thesecond portion 108 of astud 106 protrudes from afirst wall panel 102 adjacent thefirst end 119 offirst wall panel 102. Thesecond portion 108 of astud 106 protrudes from asecond wall panel 102 adjacent thesecond end 120 of thesecond wall panel 102. In operation, thesecond portions 108 of thestuds 106 of the first and second wall panels are brought into contact at anoverlapping region 150. Thereafter, the second portions are rigidly connected at theoverlapping region 150 by any method known in the art, such as, but not limited to, welding, a threaded connection, clamping, etc. - With respect to
FIG. 8 b, another variation of the end-to-end interconnection between twoadjacent wall panels 102 is shown. More specifically, thesecond portion 108 of astud 106 protrudes from afirst wall panel 102 adjacent thefirst end 119 offirst wall panel 102. Thesecond portion 108 of astud 106 protrudes from asecond wall panel 102 adjacent thesecond end 120 of thesecond wall panel 102. In operation, thesecond portions 108 of thestuds 106 of the first and second wall panels are brought into contact at anoverlapping region 150. Thereafter, abracket 138 is provided for providing additional support to theoverlapping region 150. Finally,fasteners 154 are provided for rigidly interconnecting thesecond portions 108 of the studs and thebracket 138. To further provide for a robust connection, awasher 158 can be provided to fill in any gaps that exist between thebracket 138 and thesecond portions 108 of thestuds 106 as shown inFIG. 8 b. It will be appreciated that while the aforementioned connection arrangements have been illustrated to rigidly interconnect twoadjacent wall panels 102, others known to ordinary artisans are contemplated as being within the scope of the present invention. - A method of a manufacturing the wall panel of
FIGS. 7 and 8 will now be described. Initially, a mold is provided for curing of the foam blocks. After a plurality of studs are placed in the mold at desired locations, a foam solution is introduced into the mold and allowed to cool and/or cure. After curing, the foam block is removed and if desired, cut into appropriate lengths. Once the foam block has been produced, a form for producing anexterior wall 146 is provided on-site or prefabricated of a shape and size corresponding to the foam block. After the concrete or other material has been placed into the form but before the concrete has completely cured, the protrudingportion 126 of eachfirst fastener 122 of the foam block 110 is pressed into the concrete or other material until thefront surface 114 of the foam block 110 abuts the concrete or other material and the concrete or other material flows into in provided cutouts on thefront surface 114. Thereafter, once the concrete or other material has fully cured around the protrudingportion 126 of eachfirst fastener 122 and within the cutouts, theexterior wall 146 will be rigidly mounted to thefront surface 114 of the foam block 110. As previously described, if ahead portion 130 is provided on thefirst fastener 122, additional rigidity can be provided between theexterior wall 146 and the foam block 110 due to the concrete curing around thehead portion 130. - Referring now to
FIG. 9 and according to another embodiment of the present invention, alightweight wall panel 202 is provided that includes afoam insulation block 210 with a plurality ofstuds 206 embedded therein. The foam block includes front andrear surfaces stud 206 is metal and includes first andsecond portions rear surfaces stud 206 comprises a c-shaped channel. However, ordinary artisans will recognize that other shapes such as z-shaped channels or other shaped channels can be utilized depending on the required strength of thewall panel 202. While eachstud 206 will generally extend from the top to the bottom of thefoam block 210, ordinary artisans will appreciate that multiple studs can be utilized from the top to the bottom of the foam block instead of a just asingle stud 206. Further, thestuds 206 are preferably equally spaced along the length of the foam block. However, it is recognized that other spacings between studs may be required depending upon the desired design requirements. - Further, at least one
first fastener 222 is mounted to thefront surface 214 of thefoam block 210 as well thefirst portion 207 of one of thestuds 206. Eachfirst fastener 222 includes ahead 226, anabutment portion 230, and a protrudingportion 234. The protrudingportion 234 is inserted intofront surface 214 andaperture 209 offirst portion 207 until theabutment portion 234 abuts thefront surface 214. It is appreciated that thefirst fastener 222 can be mounted to thefront surface 214 andfirst portion 207 via a threaded connection, an interference fit, etc. - It is contemplated that fasteners of varied shapes can be provided. For instance, at least one
second fastener 238 is mounted to thefront surface 214 of thefoam block 210 as well as thefirst portion 207 of another one of thestuds 206. Eachsecond fastener 238 includes ahead 242 and a protrudingportion 246. The protrudingportion 246 is inserted intofront surface 214 andaperture 209 offirst portion 207 such that thehead 242 remains separated from the front surface. As ordinary artisans will recognize, thesecond fastener 238 can be mounted to thefront surface 214 andfirst portion 207 via a threaded connection, an interference fit, etc. Also, at least onethird fastener 250 is mounted to thefront surface 214 of thefoam block 210 as well as thefirst portion 207 of another one of thestuds 206. Eachthird fastener 250 includes abridge portion 254 and a pair oflegs 258. Thelegs 258 are inserted intofront surface 214 andapertures 209 offirst portion 207 such that thebridge portion 254 remains separated from the front surface. - With continued reference to
FIG. 9 , eachwall panel 202 also includes anexterior wall 270 constructed of, for instance, a lightweight concrete material. However, ordinary artisans will realize that other lightweight materials such as SHEETCRETE™ by Oldcastle Precast, Inc. and glasscrete can also be utilized. Before the material of theexterior wall 270 is fully cured, thehead portion 226,head portion 242 andbridge portion 254 of first, second andthird fasteners exterior wall 270 until thefront surface 214 of thefoam block 210 abuts theexterior wall 270. Also, thefront surface 214 of the foam block is provided with acutout 278, such as a dovetail-shaped cutout, to interact with the concrete or other material. It will be appreciated that more than one cutout can be provided, and also that the cutout(s) can be provided any location and in any direction along the front surface of the foam block. Thereafter, once the concrete or other material has fully cured around thehead portion 226,head portion 242 andbridge portion 254, and within thecutout 278, theexterior wall 270 will be rigidly mounted to thefront surface 214 of thefoam block 210. - Moreover, if desired, a second layer of concrete or
other material 274 can be provided on thefoam block 210 opposite from theexterior wall 270. To aid in the bonding strength of the foam block to the second layer, bores 262, 266 can be formed through the foam block and a portion of the studs. Thereafter, as the second layer of concrete orother material 274 is placed on top of the foam block, a portion of the concrete or other material will flow into the bores 262, 266. As a result, once the concrete or other material has fully cured, a more rigid connection between the foam block and the second layer will exist. One of ordinary skill will understand that additional bores can be formed through the foam block and not through the studs for flowing of the uncured second layer. - The method of manufacturing the wall panel of
FIG. 9 is similar to the method of manufacturing the wall panel ofFIG. 7 and 8 . - One of ordinary skill in the art will appreciate how many of the aforementioned features are interchangeable with the various embodiments described. For instance, any of the aforementioned fasteners can be utilized in any of the embodiments to aid in bonding of the foam block to the concrete or other material. Further, only a single type of the aforementioned fasteners can be used throughout the wall panel if desired. Additionally, dovetails, bores or other cutouts can be formed in any locations and in any directions in the foam block and the studs to allow for flowing of the concrete or other material into the dovetails, bores or other cutouts. This increases the bonding strength between the foam block and the concrete or other material as well as enhances the crack resistance of the wall panel. Moreover, second layers of concrete or other material can be formed on the wall panels opposite from the first exterior layer or concrete or other material depending upon a user's specific design requirements.
- The foregoing description of the present invention has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit the invention to the form disclosed herein. Consequently, variations and modifications commenced here with the above teachings and the skill or knowledge of the relevant art are within the scope in the present invention. The embodiments described herein above are further extended to explain best modes known for practicing the invention and to enable others skilled in the art to utilize the invention in such, or other, embodiments or various modifications required by the particular applications or uses of present invention. It is intended that the dependent claims be construed to include all possible embodiments to the extent permitted by the prior art.
Claims (20)
1. A wall panel with metallic studs comprising:
an exterior layer comprised of at least one of a cementious or gypsum based material;
a plurality of generally parallel spaced foam blocks positioned on said layer of cementious or gypsum based material, each foam block having an upper end, a lower end and two lateral sides extending therebetween, wherein one lateral side further comprises a lip extending therefrom that defines a space between adjacent foam blocks;
a plurality of metallic framing members each with an upper end and a lower end, at least one said plurality of metallic framing members positioned within the space between the adjacent foam blocks; and
a fastening device interconnecting said metallic framing members to said exterior layer.
2. The wall panel of claim 1 wherein said wall panel is adapted to be cut with a hand saw.
3. The wall panel of claim 1 wherein said plurality of foam blocks are adhered to said plurality of frame members to increase bonding strength.
4. The wall panel of claim 1 wherein said plurality of foam blocks include a passageway therethrough and said plurality of frame members include apertures that are adapted to receive utility wiring or plumbing.
5. The wall panel of claim 1 , further comprising a first channel interconnected to said upper ends of said plurality of spaced metallic framing members.
6. The wall panel of claim 1 , wherein said fastening device is comprised of a stamped flat metal member coated with nylon and is adapted for attachment to said plurality of frame members with at least one of screws, rivets, welds and adhesives.
7. The wall panel of claim 1 , further comprising a bonding agent positioned between said layer of cementious or gypsum material and said foam blocks.
8. The wall panel of claim 1 , further comprising a second channel interconnected to said lower ends of said plurality of spaced framing members.
9. The wall panel of claim 1 , further comprising at least one bore formed through at least a portion of at least one of the framing members and at least one of the foam blocks opposite from the exterior layer for aiding in the bonding of a second exterior layer comprised of at least one of a cementious or gypsum based material.
10. The wall panel of claim 1 , wherein the exterior layer comprises concrete.
11. The wall panel of claim 1 , wherein the exterior layer comprises SHEETCRETE™ by Oldcastle Precast, Inc.
12. The wall panel of claim 1 , wherein the exterior layer comprises glasscrete.
13. A low density wall panel, comprising:
a first exterior layer comprised of at least one of a cementious or gypsum based material;
a foam block positioned on the first exterior layer, the foam block having a front surface and a rear surface, the front surface being in contact with the first exterior layer;
a plurality of studs embedded in the foam block, wherein each stud includes first and second portions, the first portion being adjacent the front surface of the foam block and the second portion being generally opposite the first portion; and
at least one fastener extending into the foam block and the first exterior layer.
14. The wall panel of claim 13 , wherein at least one bore is formed through the foam block and the second portion of at least one of the plurality of studs for aiding in the bonding of a second layer of at least one of a cementious or gypsum based material to the foam block opposite from the first exterior layer.
15. The wall panel of claim 13 , wherein the front surface of the foam block includes at least one cutout for aiding in the bonding of the first exterior layer to the foam block.
16. The wall panel of claim 15 , wherein the cutout includes a dovetail-shaped cutout.
17. The wall panel of claim 13 , wherein the fastener includes a head, an abutment portion, and a protruding portion; wherein when the protruding portion is mounted in the foam block, the abutment portion contacts the front surface of the foam block and the head is mounted in the exterior layer.
18. The wall panel of claim 17 , wherein the protruding portion is threaded.
19. The wall panel of claim 13 , wherein the fastener includes a head and a protruding portion; wherein when the protruding portion is mounted in the foam block, the head is mounted in the exterior layer.
20. The wall panel of claim 19 , wherein the protruding portion is threaded.
Priority Applications (1)
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US11/773,911 US20080104913A1 (en) | 2006-07-05 | 2007-07-05 | Lightweight Concrete Wall Panel With Metallic Studs |
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US80659806P | 2006-07-05 | 2006-07-05 | |
US11/773,911 US20080104913A1 (en) | 2006-07-05 | 2007-07-05 | Lightweight Concrete Wall Panel With Metallic Studs |
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US20050262786A1 (en) * | 2002-03-06 | 2005-12-01 | Messenger Harold G | Concrete foundation wall with a low density core and carbon fiber and steel reinforcement |
US20060218870A1 (en) * | 2005-04-01 | 2006-10-05 | Messenger Harold G | Prestressed concrete building panel and method of fabricating the same |
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WO2008006034A3 (en) | 2008-10-30 |
WO2008006034A2 (en) | 2008-01-10 |
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