Patent Abstract:
A concrete wall formwork module comprising a first side wall panel structure including a first grid and a first panel secured to the first grid, a second side wall panel structure including a second grid and a second panel secured to the second grid, and connecting rods having about a same length hingedly interconnecting the first and second side wall panel structures to allow movement thereof between a retracted parallel relationship to a spaced apart parallel relationship. A plurality of such concrete wall formwork modules allow assembling a formwork which is functionally similar to conventional formwork since the facing side wall panel structures are connected in a parallel relationship by the thin spacer connecting rods which allow concrete to freely travel within the formwork. When the first and second side wall panel structures are in the retracted parallel relationship, the concrete wall formwork module is more compact and therefore easier and less costly to transport.

Full Description:
FIELD OF THE INVENTION 
     The present invention relates to concrete forms. More specifically, the present invention is concerned with concrete wall formwork modules that can be assemble like bricks to form a mold into which concrete is poured. Once assembled and filled with concrete, the modules are left in place thereby providing a concrete wall with panels on both of its sides. 
     BACKGROUND OF THE INVENTION 
     A formwork for casting a concrete wall is traditionally assembled on the premises using two wood or metal panels maintained in spaced parallel relationship by tie-wires and other appropriate connection means at their ends. This formwork is expensive since its mounting and dismounting are time consuming. 
     U.S. Pat. No. 4,888,931 issued to Serge Meilleur on Dec. 26, 1989 and entitled “Insulating Formwork for Casting a Concrete Wall” discloses an insulating formwork for casting a concrete wall, which is made of foam panels connectable to each other in parallel relationship by means of tie-rods. Once assembled, the panels define a concrete formwork into which concrete can be poured. 
     Even though the assembly of this formwork is simplified by the configuration of the panels, the formwork must still be completely assembled on the premises, thereby requiring time and manual dexterity. 
     U.S. Pat. No. 6,070,380 also issued to Meilleur on Jun. 6, 2000 and entitled “Concrete Wall Formwork Module” discloses a prefabricated concrete formwork module that may be assembled with others similar modules in the manner of a brick wall to form a mould into which concrete is poured. Even though Meilleur&#39;s module solves the above-mentioned problem of the assembly, it presents the new drawback that it is cumbersome, takes a lot of space and is therefore costly to transport. 
     OBJECTS OF THE INVENTION 
     An object of the present invention is therefore to provide a concrete wall formwork module free of the above-mentioned drawbacks. 
     SUMMARY OF THE INVENTION 
     More specifically, in accordance with a first aspect of the present invention, there is provided a concrete wall formwork reinforcing mesh structure comprising: 
     a first side wall grid; 
     a second side wall grid; and 
     at least two connecting rods having about a same length hingedly interconnecting the first and second side wall grids to allow movement thereof between a retracted parallel relationship to a spaced apart parallel relationship. 
     According to a second aspect of the present invention, there is provided a concrete wall formwork module comprising: 
     a first side wall panel structure including a first grid and a first panel mounted to the first grid; 
     a second side wall panel structure including a second grid and a second panel mounted to the second grid; and 
     at least two connecting rods having about a same length hingedly interconnecting the first and second side wall panel structures to allow movement thereof between a retracted parallel relationship to a spaced apart parallel relationship. 
     When the first and second side wall panel structures are in the retracted parallel relationship, the concrete wall formwork module is more compact and therefore easier and less costly to transport. 
     According to a third aspect of the present invention, there is provided a concrete wall formwork corner element for interconnecting two pairs of formwork side walls, each pair positioned in a spaced apart parallel relationship, the corner element comprising: 
     a reinforcing mesh defining two grid walls defining an angle therebetween; each grid wall having a side edge and a fastening plate secured to the side edge; and 
     two panel elements, each secured to a respective grid walls; 
     whereby, in operation, the corner element is positioned between the two pairs of formwork side walls so that each of the two panel elements contacts a side edge of a side wall from a respective pair of the two pairs of formwork side walls while the fastening plate overlays the side wall from a respective pair of the two pairs of formwork side walls. 
     According to a fourth aspect of the present invention, there is provided a method for creating a corner assembly for a formwork comprising: 
     providing a corner element according to the third aspect of the present invention; 
     providing first and second modules according to the second aspect of the present invention; 
     positioning each the first and second modules in the spaced apart relationship; 
     abutting both the first and second modules to the corner element so that the first side wall panels of both the first and second modules are positioned adjacent one another, the second wall panel of the first module contacts a first one of the fastening plates of the corner element and the second wall panel of the second module contacts a second one of the fastening plates of the corner element; 
     fastening the second wall panel of the first module to the first one of the fastening plates of the corner element and the second wall panel of the second module to the second one of the fastening plates of the corner element; 
     securing the first wall panel of the first module to the first wall panel of the second module using an iron angle; and 
     securing the iron angle to the corner element. 
     The concrete wall formwork module according to the present invention allows resisting to sideways thrusting which occurs during the pour of the concrete therein and to the use of a vibrator to stiffen the concrete. It allows assembling formworks which are functionally similar to conventional formworks since the facing side wall panel structures of the module are connected in a parallel relationship by thin spacer connecting rods which allow concrete to freely travel within the formwork. 
     Other objects, advantages and features of the present invention will become more apparent upon reading the following non restrictive description of illustrated embodiments thereof, given by way of example only with reference to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In the appended drawings: 
         FIG. 1  is a perspective view of a concrete wall formwork module according to a first illustrative embodiment of the present invention; 
         FIG. 2  is a side elevation taken along line  2 - 2  from  FIG. 1 ; 
         FIG. 3  is a top plan view of the module from  FIG. 1 , illustrating the first and second side wall panel structures of the module in a retracted parallel relationship; 
         FIG. 4  is a top plan view of the module from  FIG. 1 , illustrated the first and second side wall panel structures of the module in a spaced apart parallel relationship; 
         FIG. 5  is a perspective view of an assembly of a plurality of module from  FIG. 1  in a formwork, the formwork being only partially illustrated, including a concrete wall formwork corner element according to a first illustrative embodiment of the present invention; 
         FIG. 6  is a partial top plan view of the assembly from  FIG. 5 , illustrating the assembly of the corner element with two adjacent modules from  FIG. 1 ; 
         FIG. 6A  is a partial top plan view of a concrete wall formwork corner element according to a second illustrative embodiment of the present invention; 
         FIG. 7  is a top plan view similar to  FIG. 6 , illustrating the resulting formwork with concrete poured therein; and 
         FIG. 8  is a perspective view of the assembly from  FIG. 6 ; 
         FIG. 9  is a perspective view of a concrete wall formwork module according to a second illustrative embodiment of the present invention; 
         FIG. 10  is a side elevation of the module From  FIG. 9 ; 
         FIGS. 11A-11B  are top plan partial views of the module from  FIG. 9 , illustrating the first and second side wall panel structures of the module respectively in a retracted parallel relationship and in a spaced apart parallel relationship; 
         FIG. 12  is a top plan view illustrating a method for creating a 90 degrees corner between two intersecting modules similar to the module from  FIG. 9 ; 
         FIG. 13  is a top plan view illustrating a method for creating a 135 degrees corner between two intersecting modules similar to the module from  FIG. 9 ; 
         FIG. 14  is a perspective view of a concrete wall formwork module according to a third illustrative embodiment of the present invention; 
         FIG. 15  is a side elevation of the module From  FIG. 14 ; 
         FIGS. 16A-16B  are top plan partial views of the module from  FIG. 14 , illustrating the first and second side wall panel structures of the module respectively in a retracted parallel relationship and in a spaced apart parallel relationship; 
         FIG. 17  is a side elevation of a concrete wall formwork module according to a fourth illustrative embodiment of the present invention; 
         FIG. 18  is a side elevation of a concrete wall formwork module according to a fifth illustrative embodiment of the present invention; 
         FIG. 19  is a top plan view illustrating a method for creating a 90 degrees corner between two intersecting modules similar to the module from  FIG. 18 ; 
         FIG. 20  is a top plan view illustrating a method for creating a 135 degrees corner between two intersecting modules similar to the module from  FIG. 18 ; and 
         FIG. 21  is a perspective view illustrating the assembly of a formwork wall using modules from  FIG. 1 . 
     
    
    
     DETAILED DESCRIPTION 
     A concrete wall formwork module  10  according to a first illustrative embodiment of the present invention will now be described with reference to  FIGS. 1 and 2  of the appended drawings. 
     The concrete wall formwork module  10  comprises first and second side wall panel structures  12  and  14  and a plurality of connecting spacer rods  16  for hingedly interconnecting the first and second side wall panel structures  12  and  14 . 
     Each side wall panel structures  12  and  14  includes a rectangular metallic side wall wire grid  18  embedded in a respective insulated foam panel  20 ,  22 . The two side wall grids  18  together with the plurality of spacer rods  16  define a deployable concrete wall formwork reinforcing mesh structure. 
     Each wire grid  18  includes a series of parallel vertical metallic rods  24  generally extending along the height of its respective panel  12  or  14 . The rods  24  are configured so as to define stand-out portions yielding lugs  26  as will be described furtherin in more detail. The vertical rods  24  allow providing structural integrity to the module  10  when concrete is poured therein. 
     Each grid  18  further includes parallel horizontal metallic rods  28  extending along the width of the respective panel  12  or  14 . The horizontal rods  28  are secured to the vertical rods  24  through welding. More specifically, the horizontal rods  28  are positioned on the interior side of the vertical rods  24  so as to protect the welding joints from the sideways thrust which occurs during the pour of the concrete between the two side wall panel structures  12  and  14  as will be explained hereinbelow in more detail. 
     The top and bottom edge portions  30  and  32  of each panel  12  or  14  are configured for complementary engagement. More specifically, the top and bottom edge portions  30  and  32  are provided with grooves  34  and  36  positioned on opposite sides in a complementary way. Other engagement means, including tongues and grooves can alternatively be provided on the top and bottom edge portions  30  and  32 . 
     When the top and bottom edge portions  30  and  32  of the panels  12 - 14  are flat, fastening means can be used to assemble modules  10  on top of each other. 
     The panels  12  and  14  are made of low density plastic foam having a high insulating ability such as polyurethane and expanded or extruded polystyrene. Other materials can also be used. Moreover, as will be explained and illustrated hereinbelow, the two panels  12  and  14  need not to be made from the same material. 
     Each panel  12  or  14  is rectangular in shape and extends along a given height (h) and a given length (l). 
     The thickness of each panel  12  and  14  may vary depending on the applications, its material, its insulating ability, the strength of the material, the surface of the panel, etc. 
     Each panel  12  or  14  is molded with the grid  18  so positioned therein that the stand-out portions  26  extend therefrom for receiving the connecting rods  16  as will now be explained. More specifically, the stand-out portions  26  extend from their respective panel  20  and  22  from a distance sufficient to allow the rods  16  to freely pivot thereabout. The extending length is however kept to a minimum so as to provide stiffness to the module  10 . 
     The connecting spacer rods  16  are in the form of elongated metal plates having bended longitudinal ends defining hook portions  35  for receiving the stand-out portions  26  of the grid  18 . The metal plates  16  are so bended as to yield the hooks  35  on opposite sides thereof, resulting in a more secured attachment between the two panels  12 - 14 . 
     As illustrated in  FIGS. 3 and 4 , the two side wall panel structures  12  and  14  are movable between a retracted parallel relationship (illustrated in  FIG. 3 ) to a spaced apart parallel relationship (illustrated in  FIG. 4 ) (see arrow  38 ). 
     While in the retracted parallel relationship, the module  10  is easily transportable and can be stored or transported without taking too much space. 
     The module  10  can be easily extended and assembled with other similar modules to provide a concrete wall formwork. The connecting rods  16  allow to readily position the two side walls defined by the side wall panel structures  12  and  14  at the predetermined distance. Therefore, no measuring is required on the premises to set the appropriate distance between the two walls  12  and  14 . Of course, the module  10  can be modified and more specifically the connecting rods  16  can be sized for a specific formwork application. 
     Even though only two connecting rods  16  are sufficient to maintain the parallel relationship between the two side wall panel structures  12  and  14 , a person skilled in art would appreciate that the use of a plurality of connecting spacer rods  16  disposed regularly throughout the surface of the module  10  further allows maintaining the integrity of the concrete wall formwork module  10  during the sideways thrust which occurs during pouring of the concrete between the two side wall panel structures  12  and  14 . 
     Returning briefly to  FIGS. 1 and 2 , an elongated fastening plate  40  extends along the width of each side wall panel structures  12  and  14  parallel to the horizontal rods  28 . The plate  40  includes a flange for securing the plate  40  on the top portion of the grid  18  in a snap fitted way. The fastening plate  40  can also be secured to the grid  18  using fasteners or other fastening means. 
     Even though the module  10  has been illustrated with a grid  18  having stand-out portions  26  on the vertical rods  24 , a person skilled in the art will appreciate that the horizontal rods can alternatively be shaped to include stand-out portions. 
     The assembly of a plurality of modules  10  in a formwork and their use to receive concrete will now be explained in more detail with reference to  FIGS. 5 to 8 . 
     As illustrated in  FIG. 5 , two adjacent modules  10  on a same row are abutted. Then they are secured to one another by attaching adjacent pairs of stand-out portions  26 , one from each module  10 , using tie wires. 
     Two adjacent modules  10  and  10 ′ on two different rows are connected through their top and bottom end edge portions  30  and  32 . More specifically, as described hereinabove, the complementary grooves  34  and  36  are joined. Two adjacent modules  10  and  10 ′ are also secured to one another by attaching adjacent pairs of stand-out portions  26 , one from each module  10  and  10 ′, using tie wires (not shown). 
     Of course, all the modules  10  and  10 ′ are then fully extended and their first and second side wall panel structures  12  and  14  are in their spaced apart relationship. It is to be noted that the modules  10 ′ are identical to the modules  10 . A different numeral reference is used to enlighten the fact that they are located on the second row and thus are distinct modules. 
     The assembly of the concrete wall formwork module  10  and  10 ′ in two parallel formwork walls is done similarly to the assembly of a brick wall: the modules  10 ′ on the second row are so positioned that the lateral joints  39  between two adjacent modules are not aligned with similar lateral joints  41  between two adjacent modules from the first row. The same principle of course applies for any two consecutive rows. Of course, a person skilled in the art would appreciate that at least one concrete wall formwork module  10  or  10 ′ from at least one out of two consecutive rows is of a different width than the others. This narrower module is either manufactured narrower or cut to the required width. 
     A concrete wall formwork corner element  42  according to a first illustrative embodiment of the present invention is provided at the intersection of two perpendicular rows to close the formwork and obviously restrain concrete  43  therein. The corner element  42  will now be described in more detail with references to  FIGS. 5 to 8 . 
     The corner element  42  includes an L-shaped grid  44  embedded in an L-shaped insulated foam panel  46 . Similarly to the grid  18 ′, the L-shaped grid  44  includes a series of vertical rods  48  and a series of horizontal rods  50  secured to the vertical rods  48 . An L-shaped support corner  52  is secured to the external side of the corner of the grid  44 . The horizontal rods  48  are so shaped as to define stand-out portions  54  at the intersection of the two walls defined by the L-shaped foam panel  46 . The stand-out portions are so configured and sized so as to extend from the foam panel  46 . 
     Each of the two lateral side arm portions of the L-shaped grid  44  ends with a protruding portion  56  which extends out of the foam panel  46  parallel thereto. Each of the two lateral edges of the grid  48 , which are defined by the extremities of the protruding portions  56 , receives an elongated fastening plate  58 , similar in structure to the elongated fastening plate  40 . The fastening plates  58  allow securing adjacent modules  10  or  10 ′ thereto by providing a surface to receive fasteners  57 . Washers  59  are further used to limit the penetration of the fastener  57  in the module  10  or  10 ′ as it is well known. The fastening plates  58  are welded to the protruding portions  56  of the grid  48 . Other securing method can of course be used. 
     The top and bottom edge portions  60  and  62  of the corner element  42  are also configured for complementary engagement. More specifically, the top and bottom edge portions  60  and  62  are provided with grooves  34  and  36  positioned on opposite sides in a complementary way and for complementary engagement with the top and bottom edge portions  30  and  32  of the module  10  and  10 ′. 
     The corner element  42  is further secured to each pair of adjacent intersecting modules  10  or  10 ′ by the use of a series of parallel transversal corner rods  61 . Each corner rod  61  has one of its longitudinal ends is mounted to a stand-out portion  54  of the L-shaped grid  44 . The other longitudinal end of each corner rod  61  is secured to an angle iron  65  mounted to both adjacent modules  10  or  10 ′ at the intersection thereof using fasteners  67  in the form of screws. Other fasteners can also be used. 
     The rods  61  are provided with widening ball portions  63  at predetermined position along its length. The corner portion of the angle iron  65  includes engagement slots  69  for receiving a ball portion  63  of the rod  61 . Each engagement slot  69  includes an enlarged portion for allowing passage for the ball portions  63  and an elongated portion for receiving the narrower portion of the rod  61  as it is believed to be well known in the art. 
     The plurality of ball portions  63  on a single rod  61  make them adaptable for corner elements and corresponding modules having different geometries. 
     Of course, the number or gap between each corner rods  61  may vary. 
     The angle iron  65  can be removed when the formwork is complete. 
     As illustrated in  FIG. 6A , a concrete wall formwork corner element  42 A according to a second illustrative embodiment of the present invention is provided at the intersection of two rows defining a 135 degrees angle between them. Since the corner element  42 A is very similar to the corner element  42 , only the differences between these two corner elements will be described herein in more detail. 
     The corner element  42 A, including its inner mesh and its foam panel is so shaped as to define a  135  angle. The iron angle  65  is replaced by a similar 135-degrees corner plate  65 A. 
     A concrete wall formwork module  64  according to a second illustrative embodiment of the present invention will now be described with reference to  FIGS. 9-10 . Since the module  64  is very similar to the module  10 , and for concision purposes, only the differences between the two modules  10  and  64  will be described herein in more detail. 
     The concrete wall formwork module  64  comprises first and second side wall panel structures  12  and  14  and a plurality of connecting spacer rods  66  for hingedly interconnecting the first and second side wall panel structures  12  and  14 . 
     The connecting spacer rods  66  are in the form of elongated rectangular wire frames having their longitudinal ends folded up towards each other so as to define two hinges  68  with respective stand-out portions  26  of the grid  18 . 
     The connecting spacer rods  66  allow providing stability to the module  64  along the horizontal axis. Also, as illustrated in  FIGS. 11A-11B , the two side wall panel structures  12  and  14  are made movable by hinges  68  between a retracted parallel relationship (illustrated in  FIG. 11A ) and a spaced apart parallel relationship (illustrated in  FIG. 11B ). 
       FIGS. 12 and 13  illustrate two alternative methods to the corner element  42  to create closed junctions between two intersecting concrete wall formwork modules according to the present invention. Even though, the present method of assembly will be described with reference to the modules structurally identical to the module  64 , it can also be used to assemble other concrete wall formwork modules from the present invention as will be described furtherin. 
     In  FIG. 12 , two modules  70  are joined perpendicularly forming a 90 degrees corner. The modules  70  are identical to the modules  64  with the exception that one of the two side wall panel structures  72  and  74  is shorter than the other. This allows perpendicularly abutting the two modules  70  and still yielding a continuous canal  76  for receiving concrete (not shown). 
     Connections between the two modules  70  and integrity of the corner assembly is provided 1) by attaching the facing pair of stand-outs  77  (each pair including a stand-out from each module  70 ) located near the actual intersection of the two modules  70  using tie wire  75 , and 2) by securing an angle iron  79  at the intersection of the two modules  74  opposite the stand-outs  77  outside the channel  76 . 
       FIG. 13  illustrates the assembly of two modules  78  into a 135 degrees corner. This assembly is achieved by providing modules  78  structurally similar to the modules  64  and  74  but having the following differences: 1) one of the two side panel structures  80  and  82  is shorter than the other, and 2) the two longitudinal ends  84  and  86  of both side panel structures  80  and  82  defines a 67.5 degrees with the plane defined by the panels  80  and  82 . Thereby, abutting the two longitudinal ends  84  and  86  of a first module  78  with the respective longitudinal ends  84  and  86  of another module  78  results in a 135 degrees corner. Of course, a corner defining another angle can be achieved by providing side panel structures having longitudinal ends defining half that angle. 
     As described with reference to  FIG. 12 , connections between the two modules  78  and integrity of the resulting corner assembly is provided 1) by attaching the facing pairs of stand-outs  87  (each pair including a stand-out from each module  78 ) located near the actual intersection of the two modules  78  using a clip  85 , and 2) by securing an elongated 135-degrees angled corner plate  89  at the intersection of the two modules  78  opposite the stand-outs outside the channel formed thereby. 
       FIGS. 14-16  illustrate a concrete wall formwork module  88  according to a third illustrative embodiment of the present invention. Since the module  88  is similar to the module  64 , and for concision purposes, only the differences between the two modules  64  and  88  will be described herein in more detail. 
     The concrete wall formwork module  88  comprises first and second side wall panel structures  90  and  92  and a plurality of connecting spacer rods  66  for hingedly interconnecting the first and second side wall panel structures  90  and  92 . 
     Each side wall panel structures  90  and  92  includes a metallic wire grid  18  and a respective panel  94  and  96  so mounted thereon that the grid  18  is positioned on the exterior side surface of the panel  94  or  96 . 
     The panel  94  is a rigid panel of wood, made for example of presswood, laminated wood, or cement fiberboard, just to name a few. 
     The panel  96  is a low density plastic foam panel similar to the panels  20  and  22 . 
     Both panels  94  and  96  include respective slots  98  and  100  for receiving the stand-out portions  26  of the grids  18 . The panels  94  and  96  are secured to their respective grid  18  by positioning the spacer rods  66 . 
       FIG. 16A  illustrates the first and second side wall panel structures  90  and  92  fully extended in a spaced apart relationship.  FIG. 16B  illustrate the first and second side wall panel structures  90  and  92  in a retracted relationship. 
     Of course, the present invention allows many types and combination of board panels to be mounted to the grid  18 . 
     A person skilled in the art will appreciate that the grids  18  of the side wall panel structures  90  and  92  of the module  88  can be further used as fixation boards whereby construction elements, such as brick&#39;s strip, crepidoma, stucco, bushing (all not shown), can be attached thereon since it is not embedded in the panels  94  and  96 . 
     Of course, the concrete wall formwork corner element  42  can be adapted to complement the module  88 . Such corner element (not shown) would include two panels mounted on an L-shaped grid. 
       FIGS. 17 and 18  show two concrete wall formwork modules  102  and  104  respectively according to fourth and fifth embodiments of the present invention. 
     Since both modules  102  and  104  are very similar to the module  88 , only the differences between these respective modules and the module  88  will be described herein. 
     The concrete wall formwork module  102  comprises two side wall panel structures  90  and a plurality of connecting spacer rods  66  for hingedly interconnecting the two side wall panel structures  90 . 
     Each side wall panel structures  90  and  92  includes a metallic wire grid  18  and a panel  94  so mounted thereon that the grid  18  is positioned on the exterior side surface of the panel  94 . 
     The concrete wall formwork module  104  comprises two side wall panel structures  92  and a plurality of connecting spacer rods  66  for hingedly interconnecting the two side wall panel structures  92 . 
     Each side wall panel structures  92  includes a metallic wire grid  18  and a panel  96  so mounted thereon that the grid  18  is positioned on the exterior side surface of the panel  96 . 
     In  FIG. 19 , two modules  106  are joined perpendicularly so as to form a 90 degrees corner assembly. The modules  106  are identical to the modules  104  with the exception that the side wall panel structure  108  is shorter than the side wall panel structure  110  or  110 ′. This allows perpendicularly abutting the two modules  106  and still yielding a continuous canal  112  for receiving concrete (not shown). Moreover, the horizontal rods  113  of the side wall panel structure  110  of the module  106  are made longer on one side so as to extend beyond the panel  114  for a distance sufficient to act both as support and as a longitudinal end stop for the side wall panel structure  110 ′ of the module  106 . 
     Connections between the two modules  106  and integrity of the resulting corner assembly are provided by 1) attaching the facing pair of stand-outs  115  located near the actual intersection of the two modules  106  using a clip  111 , and 2) by securing an angle iron  117  at the intersection of the two modules  106  opposite the stand-outs  115  outside the channel  112 . 
       FIG. 20  illustrates the assembly of two modules  116  into a 135 degrees corner. This assembly is achieved by providing modules  116  structurally similar to the modules  104  but having the following differences: 1) the side panel structure  118  is shorter than the side panel structure  120 , and 2) the two longitudinal ends  122  and  124  of both side panel structures  118  and  120  defines a 67.5 degrees with the plane defines by the panels  118  and  120 . Thereby, abutting the two longitudinal ends  122  and  124  of a first module  116  with the respective longitudinal ends  122  and  124  of another module  116  results in a 135 degrees corner. Of course, a corner having another angle can be provided by providing side panel structures having longitudinal ends defining half that angle. 
     As described with reference to  FIG. 19 , connections between the two modules  116  is provided 1) by attaching facing pairs of stand-outs  126  located near the actual intersection of the two modules  116  using a clip  125 , and 2) by securing an elongated 135-degrees angled corner plate  89  at the intersection of the two modules  116  opposite the stand-outs outside the channel formed thereby. 
     The assembly of formwork  128  will now be further described with reference to  FIG. 21 . 
     The formwork  128  comprises a plurality of concrete wall formwork modules  10  assembled as described with reference to  FIG. 5 . The use of scaffolding  130 , including erecting beams  132 , allows to vertically leveling the formwork  128  in additions to serve as working platform for workers (not shown). 
     Aligning beams (not shown) can also be used for vertically aligning leveling the formwork. 
     The erecting beams  132  are secured to the modules  10  via their respective fastening plate  40  (not shown in  FIG. 21 ). In cases where the formwork is assembled from concrete wall formwork module from the present invention wherein the grid is not embedded into the panel, the erecting beams  132  can be secured directly to the grid. 
     The scaffolding  130  further includes telescopic poles  134  for aligning the wall  128 . The poles  134  are further provided with fine adjustment means operable by rotation of the poles  134 . 
     As mentioned hereinabove, the formwork  128  is erected similarly to a brick wall. For example, the modules  10  on the second row are so positioned that the lateral joints  39  between two adjacent modules are not aligned with similar lateral joints  41  between two adjacent modules  10  from the first row. The same principle of course applies for any two consecutive rows. 
     Even though the formwork  128  is illustrated comprised of modules  10 , other concrete wall formwork modules according to the present invention can also be used. 
     According to the present invention, tie wires, clips tie-rods or any fasteners can be used for attaching pairs of stand-outs while securing two adjacent modules. 
     The panels of the side wall panel structures are not limited to the materials described hereinabove. They can also be made without limitations of counterveneer, plasterboard, particle board, and any insolating plastic material. Also, as it has been described herein, any combination is also possible. 
     It is to be noted that a concrete wall formwork module according to the present invention can be provided with grids having different geometries than the one described herein. For example, the profile of the lugs may differ. They can have, for example, a rounded profile. Also, they can be made of independent pieces secured to the grids. 
     The general configuration of the grid may also differ from the orthogonal configuration illustrated. Also, the grid is not limited to the wire type. 
     The grid can be made of any metal, or of any composite material. 
     Even though the side wall panel structures of the concrete wall formwork modules form the present invention have been described as being rectangular, they can have other configuration. 
     Also, the two side wall panel structures of a single module can have different geometries. 
     Even though the lateral side edges of the panels have been illustrated as being flat, they can be provided with tongues-and-grooves or with any other complementary cooperating means. 
     Although the present invention has been described hereinabove by way of illustrated embodiments thereof, it can be modified without departing from the spirit and nature of the subject invention, as defined in the appended claims.

Technology Classification (CPC): 4