STEEL FLOOR SLAB AND BRIDGE

To provide a steel floor slab which can improve fatigue durability, and a bridge.SOLUTION: A steel floor slab comprises: a deck plate in which a plurality of positions in a first direction are supported by main girders; a horizontal rib joined to a lower face of the deck plate, and extending in the first direction; and a plurality of vertical ribs joined to the lower face of the deck plate and the horizontal rib while extending in a second direction intersecting with the first direction, and arranged in the first direction. The vertical rib arranged on the main girder side in the first direction in the deck plate out of the plurality of vertical ribs is larger in dimension than the vertical rib arranged on an intermediate part side of the adjacent main girders.SELECTED DRAWING: Figure 2 【課題】疲労耐久性を向上することができる鋼床版及び橋梁を提供する。【解決手段】鋼床版は、第１方向の複数の位置が主桁によって支持されるデッキプレートと、デッキプレートの下面に接合され、第１方向に延びる横リブと、第１方向に交差する第２方向に延びた状態でデッキプレートの下面及び横リブに接合され、第１方向に複数設けられる縦リブとを備え、複数の縦リブのうち、デッキプレートにおいて第１方向の主桁側に配置される縦リブは、隣り合う主桁同士の中間部側に配置される縦リブよりも寸法が大きい。【選択図】図２