| 摘要 |
A crank structure of a truss girder for a reinforced concrete slab is provided to manufacture and construct easily, to improve the workability on manufacture and to cut down the cost required by welding a crack with a deck plate on one contact point only. In a truss girder(10) for a reinforced concrete slab composed of an upper chord(12) and a pair of lower chords(14) installed on a deck plate(18) formed by shaping a galvanized coil steel plate, a lattice member(16) extended longitudinally by abutting the upper part of the upper chord(12) and right and left parts of the lower chord(14) by turns, and many cranks supporting the upper chord(12) and the lower chord(14), the crack is welded together with the upper chord(12) and the lower chord(14), then moved downward and welded with the deck plate(18) on one contact point.
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