BUILDING STRUCTURE FRAMEWORK FOR PROTECTING STAGE STRUCTURE

摘要

A building structure framework for supporting a sheet material covering comprises a main structure (A) having a generally rectangular floor plan and being constituted by a plurality of generally parallel arches (1) which extend at right-angles to an axis of symmetry of the floor plan. Each arch (1) is constituted by a plurality of interconnected girders (4, 5, 6) comprising a pair of leg girders (4) for supporting the arch on a horizontal surface, and at least four identical main girders (5).