Extruded permanent form-work for concrete

Abstract

A set of extruded panels is provided which can be assembled on site to create a permanent form-work for concrete. The set includes inside and outside extruded side wall panels which are arranged to be connected edge to edge to form inside and outside walls. Longitudinally spaced connecting wall panels span between the inside and outside walls at spaced positions across the width of the walls to hold the walls apart and define a hollow interior therebetween including a plurality of interconnected cells with a plurality of holes for communication of concrete and reinforcing bars between each cell and the next. Each connecting wall panel has T-shaped connectors at each edge for attachment to corresponding C-shaped receptacles on the side wall panels. Rigid foam insulation is inserted at the outside wall. The inside wall panels are arranged to support without bowing cast concrete poured into the interior within each cell and three different arrangements are shown to support the inside wall each including a wall portion at right angles to the inside wall and between the connecting walls. In one, an integral double wall is provided. In a second, a short support wall extends to a supplementary wall parallel to the inside wall and in the third, a support wall identical to the connector walls spans between the inside and outside walls.

1 . A set of extruded panels for use in constructing a form-work for concrete comprising: 
 a plurality of first side wall panels which are extruded longitudinally to define a constant cross section along a length of the panel including two opposed side edges and an intermediate panel wall portion and which are arranged to be connected edge to edge to form a first side wall with a height of the first side wall defined by the length of the panels and a width of each panel defining a part of a width of the first side wall;    a plurality of second side wall panels which are extruded longitudinally to define a constant cross section along a length of the panel including two opposed side edges and an intermediate panel wall portion and which are arranged to be connected edge to edge to form a second side wall with a height of the second side wall defined by the length of the panels and a width of each panel defining a part of a width of the first second wall;    a plurality of connecting wall panels which are extruded longitudinally to define a constant cross section along a length of the panel including two opposed side edges and an intermediate panel wall portion and which are arranged to span between the first and second side walls at spaced positions across the width of the side walls to hold the first and second walls apart and define a hollow interior therebetween including a plurality of cells formed between each connecting wall panel and the next;    each connecting wall panel having a plurality of holes for communication of concrete and reinforcing bars between each cell and the next;    each connecting wall panel having a first pair of connector element at one edge for attachment to respective ones of the first wall panels and a second pair of connector element at an opposed edge for attachment to respective ones of the second wall panels;    the first side wall panels being arranged to support without bowing cast concrete poured into the interior within each cell;    the first side wall panels including an outer wall facing outwardly of the interior and an inner wall generally parallel to the outer wall and spaced inwardly therefrom, the outer wall being supported against bowing by a wall portion between the connecting wall panels and extending generally parallel thereto and thus at right angles to the first side wall panel, the wall portion being formed integrally with the inner and outer walls.    
   
   
       2 . The set of extruded panels according to  claim 1  wherein there is provided a plurality of parallel wall portions interconnecting the inner and outer walls.  
   
   
       3 . The set of extruded panels according to  claim 1  wherein the inner wall is closed to prevent entry of concrete between the inner and outer walls.  
   
   
       4 . The set of extruded panels according to  claim 1  wherein the connecting walls each include a pair of projecting tongues extending therefrom generally at right angles thereto at a position adjacent to and spaced from the second wall panels for locating between the tongues and the second wall panels pieces of rigid foam insulation.  
   
   
       5 . The set of extruded panels according to  claim 1  wherein the second wall panels include a plurality of longitudinally extending ribs, each rib including a pair of sides and a panel portion.  
   
   
       6 . The set of extruded panels according to  claim 1  wherein the connector elements on the connector walls at the first wall panels comprise T-shaped members each for engagement into a co-operating C-shaped member on a respective one of the first wall panels, the C-shaped member being formed by the edges of the inner and outer walls.  
   
   
       7 . A set of extruded panels for use in constructing a form-work for concrete comprising: 
 a plurality of first side wall panels which are extruded longitudinally to define a constant cross section along a length of the panel including two opposed side edges and an intermediate panel wall portion and which are arranged to be connected edge to edge to form a first side wall with a height of the first side wall defined by the length of the panels and a width of each panel defining a part of a width of the first side wall;    a plurality of second side wall panels which are extruded longitudinally to define a constant cross section along a length of the panel including two opposed side edges and an intermediate panel wall portion and which are arranged to be connected edge to edge to form a second side wall with a height of the second side wall defined by the length of the panels and a width of each panel defining a part of a width of the first second wall;    a plurality of connecting wall panels which are extruded longitudinally to define a constant cross section along a length of the panel including two opposed side edges and an intermediate panel wall portion and which are arranged to span between the first and second side walls at spaced positions across the width of the side walls to hold the first and second walls apart and define a hollow interior therebetween including a plurality of cells formed between each connecting wall panel and the next;    each connecting wall panel having a plurality of holes for communication of concrete and reinforcing bars between each cell and the next;    each connecting wall panel having a first pair of connector element at one edge for attachment to respective ones of the first wall panels and a second pair of connector element at an opposed edge for attachment to respective ones of the second wall panels;    the first side wall panels being arranged to support without bowing cast concrete poured into the interior within each cell;    each first side wall panel being associated with a respective one of a plurality of inner walls generally parallel to the side wall panel and spaced inwardly therefrom, the first side wall panel being supported against bowing by a wall portion located between the connecting wall panels and extending generally parallel thereto and thus at right angles to the first side wall panel, the wall portion being connected between the first side panel and the inner wall so as to communicate forces therebetween.    
   
   
       8 . The set of extruded panels according to  claim 7  wherein the inner wall and the wall portion have holes for penetration of concrete.  
   
   
       9 . The set of extruded panels according to  claim 7  wherein the inner wall and the first wall panel each have a female connector thereon for receiving a male connector at the end of the wall portion.  
   
   
       10 . The set of extruded panels according to  claim 9  wherein the female connector comprises a pair of C-shaped receptacles facing each other and the male connectors comprise a pair of T-shaped members back to back.  
   
   
       11 . The set of extruded panels according to  claim 7  wherein the connecting walls each include a pair of projecting tongues extending therefrom generally at right angles thereto at a position adjacent to and spaced from the second wall panels for locating between the tongues and the second wall panels pieces of rigid foam insulation.  
   
   
       12 . The set of extruded panels according to  claim 7  wherein the second wall panels include a plurality of longitudinally extending ribs, each rib including a pair of sides and a panel portion.  
   
   
       13 . The set of extruded panels according to  claim 7  wherein the connector elements on the connector walls comprise T-shaped members for engagement into co-operating C-shaped members on an inner surface of the first and second panels.  
   
   
       14 . The set of extruded panels according to  claim 7  wherein the inner wall and the first wall panel are identical.