Collapsible roof for preassembled building

Claim 1

A preassembled building having a collapsible roof comprising: a. A pair of box-like structures each structure having a floor, a vertical outer wall, a vertical inner wall and a ceiling joist; b. Said box-like structures abutting at said inner walls; c. Above each box-like structure a collapsible roof comprising a roof deck and roofing attached thereon; d. Said roof deck attached to a plurality of parallel folding trusses each truss consisting of an upper and lower rafter member; e. Spaced inwardly from the lower end of the lower rafter an angled identation; f. Adjacent the inner edge of said indentation a protruding stop; g. At the outer edge of said ceiling joist a rest plate; h. Said rest plate, indentation and stop cooperating to attach said lower rafter member to said outer edge of said ceiling joist; i. The upper end of the lower rafter and the lower end of the upper rafter rotatably attached at a purlin; j. The upper end of the upper rafter terminating at a ridge member at the top, and abutting the corresponding upper rafter of the opposite box-like structure; k. An interlocking compression member, the lower end of the member attached adjacent the inner wall of the box below; l. The upper end of the compression member supporting the rafters at the purlin; whereby during transit said roofing structure is collapsed onto said ceiling joist.