Abstract: A building panel 20 is disclosed which is of sandwich construction having metal sheet structures 21, 22 interconnected by a core 23. The panel 20 includes profiled edge regions 24, 25 enabling the panel to interlock with a like panel. In one form a paper covering 27 is bonded to the metal sheet structure so that panel has a surface characteristic similar to that of plasterboard. A reinforcing element 40 is also disclosed which is arranged to be connected at the join between abutting panels to improve the load bearing capability of the panel 20.

Abstract: A building panel 20 is disclosed which is of sandwich construction having metal sheet structures 21, 22 interconnected by a core 23. The panel 20 includes profiled edge regions 24, 25 enabling the panel to interlock with a like panel. In one form a paper covering 27 is bonded to the metal sheet structure so that panel has a surface characteristic similar to that of plasterboard. A reinforcing element 40 is also disclosed which is arranged to be connected at the joint between abutting panels to improve the load bearing capacity of the panel 20.

Abstract: A method of building a triangulated frame structure of the kind composed of a plurality of subsidiary members (12) joined by their ends to a plurality of main members (7,8,11) intermedially of the ends of the main members (7,8,11). The method comprises forming the ends of the subsidiary members (12) as protrusile tongues (13); providing the main members (7,8,11) with locator slots (14) each able to accept one of the tongues (13), and located in the main members (7,8,11) at points to which the end of a subsidiary member (12) is to be joined; arraying the main members (7,8,11) and the subsidiary members (12) together substantially in correspondence with the position they are to occupy in the finished frame structure, entering the tongues (13) into that one of the slots nearest to it when the members (7,8,11,12) are in the arrayed position; and bending the entered tongues (13) so that they are at least partially restrained against withdrawal from the slots 14.