MEMBRANE STRUCTURE ROOF BEAM MATERIAL AND MEMBRANE STRUCTURE ROOF

PROBLEM TO BE SOLVED: To eliminate a need for sealing or otherwise space under a roof, and easily construct, move, erect and deform a membrane structure roof by filling hollow beams formed out of an airtight membrane with the compressed air, and jointing the sides of the beams to each other in sequence for forming the membrane structure roof. SOLUTION: Beam materials 1 have a shape for forming a part of a right circular cone, and is formed out of conical sides 5 and bottoms 6. Also, the beam materials 1 are made of high-strength lightweight membrane materials capable of resisting high internal pressure and realizing a lightweight structure. In addition, the beam materials 1 of the same shape and size are filled with the compressed air, and the right circular cone sides 5 thereof are sequentially jointed to each other for forming an annuls, with the bottoms 6 aligned, thereby providing a membrane structure roof 10 of umbrella type. As the roof 10 is formed to pressurize the membrane structure itself, a work for sealing or otherwise space under the roof 10 is not required. Also, the beam materials 1 are jointed to form the membrane roof structure, and the membrane structure roof can be divided into beam material units for design, construction, transport, erection and repair. The roof structure is also capable of easily coping even with a design change.