| 摘要 |
PROBLEM TO BE SOLVED: To provide a roof truss structure capable of obtaining a wide attic space by easy construction work and optimizing at from a viewpoint of cost. SOLUTION: This roof truss structure 10 supporting a roof is provided with a plurality of straight beams 13 arranged in a row just below two respective flat side roof faces 11 flowing to the right and left sides using a ridge 17 as a boundary and a flat side vent beam 12 arranged by crossing the straight beams 13 orthogonally. End parts of the straight beams 13 and an end part of the flat side vent beam 12 are joined with an external wall of a building, the straight beams 13 or the flat side vent beam 12, respectively, and are supported to dispense with an internal wall, thereby ensuring a wide attic space.
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