Patent ID: 7444788
Filing Date: 2008-11-04
Classification: E04B,E04C

Abstract:
1. A set of extruded panels defining 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 side wall portion and which are 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 side wall portion and which are 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 second side 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 connecting wall portion; each connecting wall panel spanning between the first and second side walls with a first side edge of the connecting wall panel being connected to the side edges of an adjacent pair of the first side wall panels and with a second side edge of the connecting wall panel being connected to the side edges of an adjacent pair of the second side wall panels 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 elements at said first side edge for attachment to respective ones of the adjacent pair of first side wall panels and a second pair of connector elements at said second side edge for attachment to respective ones of the adjacent pair of second side wall panels; the first side wall panels being arranged to support without bowing cast concrete poured into the interior within each cell; and a plurality of additional support walls which are extruded longitudinally to define a constant cross section along a length thereof; each additional support wall being located between a respective pair of the connecting wall panels and extending generally parallel thereto and thus at right angles to the first side wall panels so as to support the first side wall panels against bowing; each additional support wall being connected at its edges to an inwardly facing surface of the first and second side wall panels at positions thereon spaced from the side edges of the first and second side wall panels; wherein the first and second pairs of connector elements on the connecting wall panels each comprise a T-shaped member for engagement into a respective co-operating C-shaped member on a respective one of the first and second side wall panels at the respective side edge thereof.