ALL-WEATHER TYPE TEMPORARY ROOF

PURPOSE:To make it possible to expand a roof area easily by the structure comprising a plurality of tie beams, prefabricated scaffoldings, support beams which support the tie beams, casters and rails. CONSTITUTION:A tie beam 1 consists of a V-cross section-space truss which comprises two upper chords 1a, 1a, lower chords 1b and a plurality of diagonal members. Then, prefabricated scaffoldings 2 are erected substantially in parallel at a specified spacing in the ridge direction where casters 7 with a jack are mounted to the lower end of each post 2 respectively and are loaded on a rail 3. Then, support beams 8 are spanned on the scaffoldings 2 along the ridge direction. The beams 8 are fixed with a horizontal member 2b with a clamp 10. A bearing 9 is loaded on the beam 8. A bearing plate 4 on the end of the tie beam 1 is installed to the bearing 9 and fixed with a clip 12. This construction makes it possible to expand easily a roof area by increasing the number of scaffoldings 2 and extending the beam 8 and spanning the tie beams 1.