CA2093708A1 - Prefabricated building foundation - Google Patents
Prefabricated building foundationInfo
- Publication number
- CA2093708A1 CA2093708A1 CA 2093708 CA2093708A CA2093708A1 CA 2093708 A1 CA2093708 A1 CA 2093708A1 CA 2093708 CA2093708 CA 2093708 CA 2093708 A CA2093708 A CA 2093708A CA 2093708 A1 CA2093708 A1 CA 2093708A1
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- CA
- Canada
- Prior art keywords
- members
- wall
- footing
- foundation
- prefabricated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
Abstract
PREFABRICATED BUILDING FOUNDATION
ABSTRACT OF THE DISCLOSURE
A structural member is provided for the tilt-up assembly of a foundation of a structure. The member is characterized by fastening means adapted to restrict lateral shifting of the member relative to adjacent members, and comprises either a wall panel, a wall T-junction member, a wall corner member, an elongate straight footing member, a T- junction footing member or a footing corner member. The fastening means may comprise a rabbet joint. The footing members may be provided with an upwardly-extending key adapted to mate with a groove recessed into a lower face of a wall member. The member may be coated with a waterproof coating prior to assembly thereof into a foundation. A resilient waterproof membrane may be interposed between adjacent members within a completed foundation, to provide a resilient seal between adjoining members. Methods for constructing a foundation from the members are disclosed, employing either a prefabricated footing, a conventional poured footing, or the use of a "wet footing" method, wherein prefabricated wall members are positioned onto a poured footing prior to setting of the concrete of the footing, resulting in a rigid, unitary foundation.
ABSTRACT OF THE DISCLOSURE
A structural member is provided for the tilt-up assembly of a foundation of a structure. The member is characterized by fastening means adapted to restrict lateral shifting of the member relative to adjacent members, and comprises either a wall panel, a wall T-junction member, a wall corner member, an elongate straight footing member, a T- junction footing member or a footing corner member. The fastening means may comprise a rabbet joint. The footing members may be provided with an upwardly-extending key adapted to mate with a groove recessed into a lower face of a wall member. The member may be coated with a waterproof coating prior to assembly thereof into a foundation. A resilient waterproof membrane may be interposed between adjacent members within a completed foundation, to provide a resilient seal between adjoining members. Methods for constructing a foundation from the members are disclosed, employing either a prefabricated footing, a conventional poured footing, or the use of a "wet footing" method, wherein prefabricated wall members are positioned onto a poured footing prior to setting of the concrete of the footing, resulting in a rigid, unitary foundation.
Description
~a~3708 PREFABRICATED BUILDING FOUNDATION
FIELD OF THE INVENTION
The present invention relates to prefabricated footing and tilt-up wall members for the assembly of a foundation for a house, building or other structure. The members are secured to each other with fastening means, and a waterproof membrane is positioned within the joints therebetween. A
coating may be applied to the members prior to assembly of the foundation. The invention further relates to methods of construction of a foundation from said elements.
BACKGROUND OF TÆ INVENTION
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Traditional foundations, fabricated from poured-in-place concrete and requiring in-place assembly of forms, suffer several drawbacks. Forms are time-consuming to construct and require careful assembly to maintaln square corners. Pouring of the concrete is temperature-dependant and requires the transport of large amounts of concrete. If it is desired to provide a waterproof coating to the foundation, this must be applied on site, with consequent time and labour requirements and difficulties in obtaining complete coating.~ The resulting foundation comprises a unitary structure and is subject to cracking, and ~ ~ 3~
consequential leakage, as a result of soil shifting and heaving. In particular, the joint between the footlng and the walls is subject to cracking. As well, the upper surface of the footing of a poured-in-place foundation is usually flat, and doesn~t easily dispel accumulated moisture.
These drawbacks may be addressed by the use of a tilt-up prefabricated foundation comprised of interlocking structural members. Assembly of such a structure is rapid and relatively inexpensive, with the requirement of in-place 1 10 forms and concrete pouring eliminated. The use of pre-cast corner members provides an easy means to maintain square corners. A slight flexibility of the joints between the members reduces the likelihood of cracking, and the use of a waterproof resilient membrane between the jolnts alleviates water seepage. A pre-cast footing may be provided with a sloping upper shoulder and an upwardly-extending tongue, to prevent water pooling and seepage between the wall and footlng members.
The use of interlocking prefabricated building members, including tilt-up members, is well known, in particular for retaining walls and the walls of above-ground structures.
The provision of prefabricated building members for use in foundations is less well known, and the provision of tilt-up foundation members has not been previously disclosed, to the knowledge of the present inventor. In general, known prefabricated foundation elements comprise pre-cast concrete : `
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wall members that interlock with each other and may mate with interlocking elements incorporated into the footing. For example, Canadian Patent No. 895,075 (Cooper) discloses a foundation having prefabricated interlocking wall members, that are linked to the footing and to each other by means of a tongue and groove arrangement. The footing is poured in place, and is provided with an upwardly-extending tongue that mates with a corresponding groove recessed within the wall panels. However, the use of a tongue and groove arrangement to secure the wall members together precludes the provision of a tilt-up assembly method. Rather, the members are required to be lowered into place by a crane. A drawback of this assembly method is that it is difficult to interpose a resillent sealing membrane between ad~acent wall members.
A requirement of prefabricated construction, particularly with a foundation, is that joints between ad~oinlng wall members be watertight. Typically, a prefabricated foundation wall ls provided wlth a rigid grouting between the wall panels, which will be sub~ect to cracking from the inevitable shifting of the panels, and water seepage through the wall will likely result.
It is known to provide a resilient, waterproof filler between the joints of interlocking building members, but not with respect to prefabricated foundations. It is difficult to provide a resilient filler within the joints of wall members that are slid or wedged into place, since the sliding 2~37a8 contact between the members will tend to dislodge and tear any resilient membrane or other filler. The use of a tilt-up method of assembly allows for the provision of a resilient membrane interposed between adjacent wall members.
The use of a tilt-up assembly method also provides a more rapid and less expensive means to assemble a foundation, relative to other prefabricated foundations. The wall members may be tilted up into place by use of a fork lift or winch arrangement, and readily secured to each other by means of fastening elements.
It i9 further desirable to pre-coat the foundation members with a sealant to provide a foundation resistant to the entry of moisture. The provision of prefabricated elements lends itself well to a precoating process, since each element may be fully and effectively coated at the factory with minimal expense.
OBJECTS OF THE INVENTION
It is an ob;ect of the invention to provide a prefabricated tilt-up foundatlon, comprised at least in part of interlocking members, that is adapted to resist cracking from shifting of the underlying soil, resists the entry of moisture into the foundation and that requires less time and labour than is required to construct a conventional foundation. Further ob;ects are to provide elements for the :
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assembly of a tilt-up foundation, and a method for assembling a foundation from said elements.
The present invention comprises a structural member for the tilt-up assembly of a foundation of a structure. The member is characterized by fastening means adapted to restrict lateral shifting of the member relative to adjacent members. The member comprises either a wall panel, a wall T-~unction member, a wall corner member, an elongate straight footing member, a T-junction footing member or a footing corner member. The fastening means may comprise a rabbet ~oint. For the wall members, the fastening means may further include a plate spanning the junction between neighbouring members. The plate may be engaged to anchor plates anchored to the vertical corners of each wall member. The footing members may be provided with a sloping upper shoulder for moisture drainage and an upwardly-extending key adapted to mate with a groove recessed into a lower face of a wall member. The member may be coated with a waterproof coating prior to assembly thereof into a foundation.
The invention further comprises a foundation for a structure, assembled at least in part from the said structural members. A resilient waterproof membrane may be ?
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interposed between ad~acent members, to provide a resilient seal between adjoining members. The membrane may comprise a spray-on compound adapted to provlde a resilient membrane when sprayed onto a surface.
The invention further comprises a method for constructing a foundation, comprising the assembly of members as identified above. The footing may be fabricated either by way of traditional in-place forming, or the footing comprise interlocking precast members, or the foundation may be assembled with a "wet footing~ method, wherein prefabricated wall members are positioned onto a poured footing while the concrete thereof is still plastic, with the footing forming a rigid link with the wall upon setting of the concrete.
It wlll be understood that all directional references employed herein, such as ~vertical~ horizontal~, "upper", "lower", etc., are in reference to the normal, installed position of the structural members.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is perspective view of a portion of a foundation fabricated from interlocking members according to the present invention;
Figure 2 is a plan view of a foundatlon according to the present invention;
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Figure 3 is a sectional view, along line a-a of Figure 2, showing a portion of a wall panel and footing member;
Figure 4 is a perspective view of a first side footing member;
Figure 5 is a perspective view of a second side footing member;
Figure 6 is a perspective view of a footing corner member;
Figure 7 is a plan view of a footing corner member;
Figure 8 is a perspective view of a footing T-junction member;
Figure 9 is a plan view of a footing T-junction member;
Figure 10 is a perspective view of a first wall panel;
Figure 11 is a plan view of a first wall panel;
Figure 12 ls a perspective view of a second wall panel;
I Figure 13 is a plan view of a second wall panel;
I Figure 14 is a perspective view of a wall corner member;
Flgure 15 ls a plan view of a wall corner member;
Figure 16 is a perspective view of a wall T-junction member;
Figure 17 is a plan view of a wall T-~unction member; ~
Figure 18 is a sectional view, along line b-b of Figure ~ ::
1, of a portion of a wall;
Figure 19 sectional view as in Figure 3, showing a further embodiment of the invention.
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
A foundation constructed according to the present invention, as seen generally in Figures 1 and 2, comprises a concrete footing 2 and walls 4. The walls are comprised of interlocking members, consisting of wall panels 5, wall corner members 6 and wall T-junction members 7. The footing 2 is comprised as well of interlocking members, comprising longitudlnal side footing members 8, footing T-junction members 9 and corner footing members 10. As in a conventional foundation, the footing rests within a prepared, level trench.
Referring to Figures 3-9, a longitudinally-oriented key 12 extends from the upper face of the footing members 8, 9 and 10 adapted to mate with a corresponding groove 14 recessed into the lower face of the wall members. The key and groove may be tapered slightly downwardly and outwardly, to provide for a tlghter fit. The key and groove arrangement is adapted both to retain the wall members onto the footing, and to hinder seepage between the footing and wall. It will be apparent that the shape of the key may vary, and needn't comprise an elongate member. The key could, for example, comprise an array of generally cubical members, adapted to mate with corresponding cubical recesses wlthin the wall members. A strip of waterproof membrane 15 is interposed between the footing and the respective wall members.
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The footing and wall members may be reinforced with steel reinforcing rod or mesh, not shown, which may be introduced during fabrication of the various members by employing a two-step pouring process, with the mesh or rod being positioned during fabrication between layers of concrete making up the respective member.
The upper face of each of the footing members is provided with downwardly sloping shoulders 20 on either lateral side thereof. The slope of the shoulders allows moisture to drain from the footing, and to collect in a drainage pipe 22 positioned adjacent the footing outside the foundation.
The footing members interlock by means of a rabbet arrangement, wherein a rectangular recess 25 recessed within an end face of each footing member mates with a corresponding tongue 26 extending from an end face of a neighbouring footing member. As seen in Figures 4-7, first and second types of side footing members 8~a) and 8~b), respectively, are provided, having the tongue extending outwardly from the end faces ad~acent the same and opposing sides of the member, respectively. Any footing configuration may be assembled from the various slde, corner and T-~unction members, provided that only right-angled corners are required.
Referring to Figures 10-17, each of the wall members 5, 6 and 7 is provided with an interlocking means similar to that of the footing members, comprising a recess 30 adapted 3 ~
to mate with a tongue 32 in a neighbouring wall member. The configuration of the wall members correspond with the individual footing members, including the provision of first and second wall panels 5(a) and 5(b), having the tongue 32 extending outwardly from the end faces of the panels adjacent the same and opposing lateral faces, respectively. Any right-angled wall configuration may be assembled with various combinations of first and second wall panels 5(a) and (b), wall corner members 6 and wall T-junction members 7.
I 10The wall panels s(a) and (b) may be transported and 1 assembled with relative ease in lengths up to about 10 feet.
It will be seen that the interlocking means may comprise any ~oint or fastening means that allows for tilt-up assembly of the wall members. For example, the side faces could be tapered or even square, provided that a suitable fastening means is provided to secure ad~acent wall members together.
Referring to Figure 18, a resilient membrane 40 is applied between adjoining wall members, and serves to prevent the seepage of moisture between the members and to accommodate slight shifting of the members relative to each ¦other and their expansion and contraction. The membrane may be applied by spraying a compound adapted to provide a resilient membrane when sprayed onto a surface, onto the side faces of the wall members before or during assembly of the foundation. An external metal fastening means 45, comprising inner and outer steel plates 50, 52, retains the ~ :
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membrane in position and further secures adjacent wall members together. The fastening plates are recessed within a shallow recess 54 extending along each exterior vertical edge of each wall member. The inner steel plates 50 are each fixed to a vertical edge of one of the wall members within the recess 54. The inner plates may be anchored to the wall member by means of anchors 56 set into the wall during the fabrication thereof. The outer steel plate 52 spans a pair of adjacent inner plates, and may be tack welded to the inner plates following assembly of the foundation.
Assembly of the foundation is commenced by positioning the footing members 2 within a level trench, in the desired configuration. The membrane strip 15 is drapeæ over the footing, and individual wall panels and wall corner members are then lowered into the trench and tilted up by crane, forklift or winch from a reclining position to a vertical position. Resilient membranes 40 may applied to the end faces of the wall panels and wall corner members before they are positioned, if the membrane has not been applied prior to delivery to the site. It may be necessary to prop the wall panels in place prior to fastening. The wall panels and corner members are then secured together by tack welding or otherwise fastening an outer plate 52 across each neighbouring pair of inner plates 50. A drainage pipe 22 may be placed alongside the footing exterlor to the foundation.
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An alternative construction method, shown in Figure 19, is to apply a "wet footing~ method, wherein a conventional poured footing 60 is provided. The forms 62 for the footing of this method extend several inches above the upper surface of the wet concrete. ~he wall members 5 are positioned onto the footing before the concrete has set. Displacement of the concrete by the wall members causes the thickness of the footing to increase, allowing the use of a reduced amount of concrete for the construction of the footing. Upon hardening, the concrete forms a rigid bond with the wall, resulting in a rigid, unitary wall and footing. This method of assembly is particularly appropriate for commerclal buildings, wherein a rigid connection is required between footing and foundation wall.
Although the present invention has been described in detail by way of preferred embodiments thereof, it will be understood by those skilled in the art that variations may be made thereto without departing from the spirit and scope of the invention, as defined by the appended claims.
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FIELD OF THE INVENTION
The present invention relates to prefabricated footing and tilt-up wall members for the assembly of a foundation for a house, building or other structure. The members are secured to each other with fastening means, and a waterproof membrane is positioned within the joints therebetween. A
coating may be applied to the members prior to assembly of the foundation. The invention further relates to methods of construction of a foundation from said elements.
BACKGROUND OF TÆ INVENTION
~ :
Traditional foundations, fabricated from poured-in-place concrete and requiring in-place assembly of forms, suffer several drawbacks. Forms are time-consuming to construct and require careful assembly to maintaln square corners. Pouring of the concrete is temperature-dependant and requires the transport of large amounts of concrete. If it is desired to provide a waterproof coating to the foundation, this must be applied on site, with consequent time and labour requirements and difficulties in obtaining complete coating.~ The resulting foundation comprises a unitary structure and is subject to cracking, and ~ ~ 3~
consequential leakage, as a result of soil shifting and heaving. In particular, the joint between the footlng and the walls is subject to cracking. As well, the upper surface of the footing of a poured-in-place foundation is usually flat, and doesn~t easily dispel accumulated moisture.
These drawbacks may be addressed by the use of a tilt-up prefabricated foundation comprised of interlocking structural members. Assembly of such a structure is rapid and relatively inexpensive, with the requirement of in-place 1 10 forms and concrete pouring eliminated. The use of pre-cast corner members provides an easy means to maintain square corners. A slight flexibility of the joints between the members reduces the likelihood of cracking, and the use of a waterproof resilient membrane between the jolnts alleviates water seepage. A pre-cast footing may be provided with a sloping upper shoulder and an upwardly-extending tongue, to prevent water pooling and seepage between the wall and footlng members.
The use of interlocking prefabricated building members, including tilt-up members, is well known, in particular for retaining walls and the walls of above-ground structures.
The provision of prefabricated building members for use in foundations is less well known, and the provision of tilt-up foundation members has not been previously disclosed, to the knowledge of the present inventor. In general, known prefabricated foundation elements comprise pre-cast concrete : `
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wall members that interlock with each other and may mate with interlocking elements incorporated into the footing. For example, Canadian Patent No. 895,075 (Cooper) discloses a foundation having prefabricated interlocking wall members, that are linked to the footing and to each other by means of a tongue and groove arrangement. The footing is poured in place, and is provided with an upwardly-extending tongue that mates with a corresponding groove recessed within the wall panels. However, the use of a tongue and groove arrangement to secure the wall members together precludes the provision of a tilt-up assembly method. Rather, the members are required to be lowered into place by a crane. A drawback of this assembly method is that it is difficult to interpose a resillent sealing membrane between ad~acent wall members.
A requirement of prefabricated construction, particularly with a foundation, is that joints between ad~oinlng wall members be watertight. Typically, a prefabricated foundation wall ls provided wlth a rigid grouting between the wall panels, which will be sub~ect to cracking from the inevitable shifting of the panels, and water seepage through the wall will likely result.
It is known to provide a resilient, waterproof filler between the joints of interlocking building members, but not with respect to prefabricated foundations. It is difficult to provide a resilient filler within the joints of wall members that are slid or wedged into place, since the sliding 2~37a8 contact between the members will tend to dislodge and tear any resilient membrane or other filler. The use of a tilt-up method of assembly allows for the provision of a resilient membrane interposed between adjacent wall members.
The use of a tilt-up assembly method also provides a more rapid and less expensive means to assemble a foundation, relative to other prefabricated foundations. The wall members may be tilted up into place by use of a fork lift or winch arrangement, and readily secured to each other by means of fastening elements.
It i9 further desirable to pre-coat the foundation members with a sealant to provide a foundation resistant to the entry of moisture. The provision of prefabricated elements lends itself well to a precoating process, since each element may be fully and effectively coated at the factory with minimal expense.
OBJECTS OF THE INVENTION
It is an ob;ect of the invention to provide a prefabricated tilt-up foundatlon, comprised at least in part of interlocking members, that is adapted to resist cracking from shifting of the underlying soil, resists the entry of moisture into the foundation and that requires less time and labour than is required to construct a conventional foundation. Further ob;ects are to provide elements for the :
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assembly of a tilt-up foundation, and a method for assembling a foundation from said elements.
The present invention comprises a structural member for the tilt-up assembly of a foundation of a structure. The member is characterized by fastening means adapted to restrict lateral shifting of the member relative to adjacent members. The member comprises either a wall panel, a wall T-~unction member, a wall corner member, an elongate straight footing member, a T-junction footing member or a footing corner member. The fastening means may comprise a rabbet ~oint. For the wall members, the fastening means may further include a plate spanning the junction between neighbouring members. The plate may be engaged to anchor plates anchored to the vertical corners of each wall member. The footing members may be provided with a sloping upper shoulder for moisture drainage and an upwardly-extending key adapted to mate with a groove recessed into a lower face of a wall member. The member may be coated with a waterproof coating prior to assembly thereof into a foundation.
The invention further comprises a foundation for a structure, assembled at least in part from the said structural members. A resilient waterproof membrane may be ?
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interposed between ad~acent members, to provide a resilient seal between adjoining members. The membrane may comprise a spray-on compound adapted to provlde a resilient membrane when sprayed onto a surface.
The invention further comprises a method for constructing a foundation, comprising the assembly of members as identified above. The footing may be fabricated either by way of traditional in-place forming, or the footing comprise interlocking precast members, or the foundation may be assembled with a "wet footing~ method, wherein prefabricated wall members are positioned onto a poured footing while the concrete thereof is still plastic, with the footing forming a rigid link with the wall upon setting of the concrete.
It wlll be understood that all directional references employed herein, such as ~vertical~ horizontal~, "upper", "lower", etc., are in reference to the normal, installed position of the structural members.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is perspective view of a portion of a foundation fabricated from interlocking members according to the present invention;
Figure 2 is a plan view of a foundatlon according to the present invention;
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Figure 3 is a sectional view, along line a-a of Figure 2, showing a portion of a wall panel and footing member;
Figure 4 is a perspective view of a first side footing member;
Figure 5 is a perspective view of a second side footing member;
Figure 6 is a perspective view of a footing corner member;
Figure 7 is a plan view of a footing corner member;
Figure 8 is a perspective view of a footing T-junction member;
Figure 9 is a plan view of a footing T-junction member;
Figure 10 is a perspective view of a first wall panel;
Figure 11 is a plan view of a first wall panel;
Figure 12 ls a perspective view of a second wall panel;
I Figure 13 is a plan view of a second wall panel;
I Figure 14 is a perspective view of a wall corner member;
Flgure 15 ls a plan view of a wall corner member;
Figure 16 is a perspective view of a wall T-junction member;
Figure 17 is a plan view of a wall T-~unction member; ~
Figure 18 is a sectional view, along line b-b of Figure ~ ::
1, of a portion of a wall;
Figure 19 sectional view as in Figure 3, showing a further embodiment of the invention.
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
A foundation constructed according to the present invention, as seen generally in Figures 1 and 2, comprises a concrete footing 2 and walls 4. The walls are comprised of interlocking members, consisting of wall panels 5, wall corner members 6 and wall T-junction members 7. The footing 2 is comprised as well of interlocking members, comprising longitudlnal side footing members 8, footing T-junction members 9 and corner footing members 10. As in a conventional foundation, the footing rests within a prepared, level trench.
Referring to Figures 3-9, a longitudinally-oriented key 12 extends from the upper face of the footing members 8, 9 and 10 adapted to mate with a corresponding groove 14 recessed into the lower face of the wall members. The key and groove may be tapered slightly downwardly and outwardly, to provide for a tlghter fit. The key and groove arrangement is adapted both to retain the wall members onto the footing, and to hinder seepage between the footing and wall. It will be apparent that the shape of the key may vary, and needn't comprise an elongate member. The key could, for example, comprise an array of generally cubical members, adapted to mate with corresponding cubical recesses wlthin the wall members. A strip of waterproof membrane 15 is interposed between the footing and the respective wall members.
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The footing and wall members may be reinforced with steel reinforcing rod or mesh, not shown, which may be introduced during fabrication of the various members by employing a two-step pouring process, with the mesh or rod being positioned during fabrication between layers of concrete making up the respective member.
The upper face of each of the footing members is provided with downwardly sloping shoulders 20 on either lateral side thereof. The slope of the shoulders allows moisture to drain from the footing, and to collect in a drainage pipe 22 positioned adjacent the footing outside the foundation.
The footing members interlock by means of a rabbet arrangement, wherein a rectangular recess 25 recessed within an end face of each footing member mates with a corresponding tongue 26 extending from an end face of a neighbouring footing member. As seen in Figures 4-7, first and second types of side footing members 8~a) and 8~b), respectively, are provided, having the tongue extending outwardly from the end faces ad~acent the same and opposing sides of the member, respectively. Any footing configuration may be assembled from the various slde, corner and T-~unction members, provided that only right-angled corners are required.
Referring to Figures 10-17, each of the wall members 5, 6 and 7 is provided with an interlocking means similar to that of the footing members, comprising a recess 30 adapted 3 ~
to mate with a tongue 32 in a neighbouring wall member. The configuration of the wall members correspond with the individual footing members, including the provision of first and second wall panels 5(a) and 5(b), having the tongue 32 extending outwardly from the end faces of the panels adjacent the same and opposing lateral faces, respectively. Any right-angled wall configuration may be assembled with various combinations of first and second wall panels 5(a) and (b), wall corner members 6 and wall T-junction members 7.
I 10The wall panels s(a) and (b) may be transported and 1 assembled with relative ease in lengths up to about 10 feet.
It will be seen that the interlocking means may comprise any ~oint or fastening means that allows for tilt-up assembly of the wall members. For example, the side faces could be tapered or even square, provided that a suitable fastening means is provided to secure ad~acent wall members together.
Referring to Figure 18, a resilient membrane 40 is applied between adjoining wall members, and serves to prevent the seepage of moisture between the members and to accommodate slight shifting of the members relative to each ¦other and their expansion and contraction. The membrane may be applied by spraying a compound adapted to provide a resilient membrane when sprayed onto a surface, onto the side faces of the wall members before or during assembly of the foundation. An external metal fastening means 45, comprising inner and outer steel plates 50, 52, retains the ~ :
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membrane in position and further secures adjacent wall members together. The fastening plates are recessed within a shallow recess 54 extending along each exterior vertical edge of each wall member. The inner steel plates 50 are each fixed to a vertical edge of one of the wall members within the recess 54. The inner plates may be anchored to the wall member by means of anchors 56 set into the wall during the fabrication thereof. The outer steel plate 52 spans a pair of adjacent inner plates, and may be tack welded to the inner plates following assembly of the foundation.
Assembly of the foundation is commenced by positioning the footing members 2 within a level trench, in the desired configuration. The membrane strip 15 is drapeæ over the footing, and individual wall panels and wall corner members are then lowered into the trench and tilted up by crane, forklift or winch from a reclining position to a vertical position. Resilient membranes 40 may applied to the end faces of the wall panels and wall corner members before they are positioned, if the membrane has not been applied prior to delivery to the site. It may be necessary to prop the wall panels in place prior to fastening. The wall panels and corner members are then secured together by tack welding or otherwise fastening an outer plate 52 across each neighbouring pair of inner plates 50. A drainage pipe 22 may be placed alongside the footing exterlor to the foundation.
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An alternative construction method, shown in Figure 19, is to apply a "wet footing~ method, wherein a conventional poured footing 60 is provided. The forms 62 for the footing of this method extend several inches above the upper surface of the wet concrete. ~he wall members 5 are positioned onto the footing before the concrete has set. Displacement of the concrete by the wall members causes the thickness of the footing to increase, allowing the use of a reduced amount of concrete for the construction of the footing. Upon hardening, the concrete forms a rigid bond with the wall, resulting in a rigid, unitary wall and footing. This method of assembly is particularly appropriate for commerclal buildings, wherein a rigid connection is required between footing and foundation wall.
Although the present invention has been described in detail by way of preferred embodiments thereof, it will be understood by those skilled in the art that variations may be made thereto without departing from the spirit and scope of the invention, as defined by the appended claims.
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Claims (36)
1. A structural member for the tilt-up assembly of a foundation of a structure, said member characterized by fastening means adapted to restrict lateral shifting of the member relative to adjacent members.
2. A structural member as claimed in claim 1 comprising a side, T-junction or corner footing member.
3. A structural member as claimed in claim 2, wherein said member is provided with a key extending upwardly therefrom, adapted to mate with a corresponding recess within the lower face of a wall member.
4. A structural member as claimed in claim 2, wherein said footing member is provided with an upper lateral shoulder that slopes downwardly towards a side thereof.
5. A member as claimed in claim 1, wherein said fastening means includes a recess within a vertical edge of said member and an outwardly-extending member adjacent said recess, adapted to mate with a like recess and member of an adjacent like member to provide a rabbet joint therebetween
6. A structural member as claimed in claim 1 comprising a wall member, comprising a wall panel, wall T-junction member or wall corner member.
7. A structural member as claimed in claim 1 wherein said fastening means includes a fastening plate spanning adjacent wall members and fixedly engaged to a lateral face of each of said wall members.
8. A structural member as claimed in claim 7 wherein there is further provided an anchor plate anchored to an edge of said wall member, adapted to serve as a base for the attachment of said fastening plate.
9. A structural member as claimed in claim 1, wherein there is further provided a resilient membrane on a side face of said member, adapted to restrict the entry of moisture between adjacent members.
10. A structural member as claimed in claim 9, wherein said membrane comprises or derives from a compound adapted to provide a resilient membrane when sprayed onto a surface.
11. A structural member as claimed in claim 1 there is provided a water resistant coating substantially coating said member, applied prior to assembly thereof into a foundation.
12. A prefabricated foundation for a structure, comprised of precast structural members, said members each characterized by fastening means adapted to restrict lateral shifting of the member relative to adjacent members.
13. A prefabricated foundation as claimed in claim 12 wherein said members include footing corner, T-junction or side members.
14. A prefabricated foundation as claimed in claim 12, wherein said footing members are each provided with a key extending upwardly therefrom, adapted to mate with a corresponding recess within the lower face of a wall member.
15. A prefabricated foundation as claimed in claim 12, wherein said footing members are each provided with an upper lateral shoulder that slopes downwardly towards a side thereof.
16. A prefabricated foundation as claimed in claim 11 wherein said structural members include a wall panel, wall T-junction or wall corner members.
17. A prefabricated foundation as claimed in claim 12 wherein said fastening means includes a recess within a vertical edge of at least one of said members and an outwardly-extending member adjacent said recess, adapted to mate with a like recess and member of an adjacent like member to provide a rabbet joint therebetween
18. A prefabricated foundation as claimed in claim 17 wherein two of said rabbets are provided in said wall panel member, recessed into opposing vertical edges of the same lateral face thereof.
19. A prefabricated foundation as claimed in claim 12 wherein said fastening means includes a fastening plate spanning adjacent wall panels and fixedly engaged to a lateral face of each of said panels.
20. A prefabricated foundation as claimed in claim 19, wherein there is further provided an anchor plate anchored to an edge of each of said panels, adapted to serve as a base for the attachment of said fastening plate.
21. A prefabricated foundation as claimed in claim 12, wherein there is further provided a resilient membrane interposed between adjoining interlocking members, said membrane adapted to provide a water resistant seal between said members.
22. A prefabricated foundation as claimed in claim 21, wherein said membrane comprises a spray-on compound, applied to at least one side face of an interlocking member prior to or during assembly of said foundation.
23. A prefabricated foundation as claimed in claim 12, wherein said structural members are each provided with a water resistant coating prior to assembly into a foundation.
24. A prefabricated foundation as claimed in claim 12, wherein the footing thereof is fabricated from concrete poured into a form, and said wall members are positioned onto said footing before said concrete has hardened.
25. A method for assembling a foundation for a structure, comprising the steps of installing a footing and positioning prefabricated foundation wall members on said footing, by means of tilting up said wall members from a reclining to a vertical position and fastening each of said wall members to adjacent wall members by means of fastening means.
26. A method as claimed in claim 25 wherein interlocking means are provided between said footing and said wall members.
27. A method as claimed in claim 26 wherein said interlocking means comprises a key extending upwardly from said footing, adapted to mate with a corresponding recess within a lower face of each of said wall members.
28. A method as claimed in claim 25 wherein said footing comprises interlocking prefabricated corner members, T-junction members, or straight side members.
29. A method as claimed in claim 25 wherein said wall members comprise wall corner members, wall T-junction members, or wall panels.
30. A method as claimed in claim 25, comprising the further step of interposing a resilient waterproof membrane between adjoining wall members.
31. A method as claimed in claim 30, wherein said waterproof membrane is applied by spraying a compound adapted to provide a resilient membrane when sprayed on a surface sprayed therewith, onto at least one side face of one of said members.
32. A method as claimed in claim 25 wherein said fastening means comprises a fastening plate spanning adjacent wall panels and fixedly engaged to a lateral face of each of said panels.
33. A method as claimed in claim 32, wherein there is further provided a plate fixedly engaged to an edge of each of said wall members, adapted to serve as a base for the attachment of said fastening plate.
34. A method as claimed in claim 25, comprising the further step of interposing a waterproof membrane between said footing and said wall members.
35. A method as claimed in claim 25 comprising the further step of pre-coating each interlocking member with a water resistant coating prior to assembly thereof into said foundation.
36. A method as claimed in claim 25, comprising the further step of providing a poured concrete footing, and positioning said wall members within said footing prior to the setting of said concrete, wherein said footing and wall members form a rigid bond upon hardening of the concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2093708 CA2093708A1 (en) | 1993-04-08 | 1993-04-08 | Prefabricated building foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2093708 CA2093708A1 (en) | 1993-04-08 | 1993-04-08 | Prefabricated building foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2093708A1 true CA2093708A1 (en) | 1994-10-09 |
Family
ID=4151439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2093708 Abandoned CA2093708A1 (en) | 1993-04-08 | 1993-04-08 | Prefabricated building foundation |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2093708A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004106641A1 (en) * | 2003-05-30 | 2004-12-09 | Schroeder Peter | Insulating shuttering element, in particular for producing a building floor plate shuttering and method for producing said shuttering |
| CN104294842A (en) * | 2014-10-22 | 2015-01-21 | 国家电网公司 | Combined assembly type medium-and-low-voltage electrical equipment foundation |
| CN110106993A (en) * | 2019-05-13 | 2019-08-09 | 中国十七冶集团有限公司 | The vertical crack resistence of assembled architecture precast shear wall, waterproof construction and construction method |
| CN111502063A (en) * | 2020-04-24 | 2020-08-07 | 中冶交投善筑成都装配式建筑科技发展有限公司 | Assembled concrete corner wall |
| CN114960719A (en) * | 2022-06-28 | 2022-08-30 | 中国电建集团西北勘测设计研究院有限公司 | Assembly type annular foundation and assembly method thereof |
-
1993
- 1993-04-08 CA CA 2093708 patent/CA2093708A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004106641A1 (en) * | 2003-05-30 | 2004-12-09 | Schroeder Peter | Insulating shuttering element, in particular for producing a building floor plate shuttering and method for producing said shuttering |
| CN104294842A (en) * | 2014-10-22 | 2015-01-21 | 国家电网公司 | Combined assembly type medium-and-low-voltage electrical equipment foundation |
| CN110106993A (en) * | 2019-05-13 | 2019-08-09 | 中国十七冶集团有限公司 | The vertical crack resistence of assembled architecture precast shear wall, waterproof construction and construction method |
| CN111502063A (en) * | 2020-04-24 | 2020-08-07 | 中冶交投善筑成都装配式建筑科技发展有限公司 | Assembled concrete corner wall |
| CN114960719A (en) * | 2022-06-28 | 2022-08-30 | 中国电建集团西北勘测设计研究院有限公司 | Assembly type annular foundation and assembly method thereof |
| CN114960719B (en) * | 2022-06-28 | 2024-01-05 | 中国电建集团西北勘测设计研究院有限公司 | Assembled annular foundation and assembling method thereof |
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