| 摘要 |
PROBLEM TO BE SOLVED: To provide a triangular truss 21 of a large-scaled deck plate by lessening shape processing or weld working of an attaching part for attaching an oblique steel material 11 constituting the triangular truss 21 of the deck plate and suppressing a cost. SOLUTION: An upper steel material 5 supporting the lower side of the deck plate of a waveform cross section is long in the direction of a corrugated wavelength, a pair thereof are arranged mutually parallel, and one flat side face 5A is mutually opposed thereto. A pair of upper attaching steel plates 7 welded between a pair of the upper steel materials are obliquely oppositely positioned in the form of an inverted truncated chevron shape and both side edges are welded along the flat side face 5A of the upper steel plate. The upper end of an oblique steel material 11 is welded on these upper attaching steel plates. A pair of these oblique steel materials are arranged in the form of an inverted truncated chevron shape, and the lower end is welded on a lower steel material 13. The cross section of the lower steel material has both inverted truncated chevron shaped side faces 17A so that the lower steel material is suitable for welding with the oblique steel material, and is arranged in an orthogonal direction to the corrugated wavelength.
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