TREADBOARD, STAIRWAY AND BUILDING

PROBLEM TO BE SOLVED: To provide a stairway offering a feeling of openness and enhancing design while blocking sight from an area below the stairway.SOLUTION: A stairway includes a treadboard 20 comprising a footboard part 21 that is in an almost rectangular plate form when seen in a planar view and extends almost horizontally, a hanging flange part 22 hung from an edge at a front end part of the footboard part 21, a crest-form drip part 22a at a bottom end of the hanging flange part 22, and a water receiving groove 21c formed along an inner-side edge on a top surface of the footboard part 21. A plate-form treadboard receiving metal fitting 40 is spanned between treadboard connection metal fittings 30, 30 provided on a pair of right and left bridgeboards 10, 10. The treadboard 20 is supported on the treadboard receiving metal fitting 40, with the side with the hanging flange part 22 disposed in the front side of the stairway. Furthermore, the drip part 22a of the upper-stage treadboard 20 and the water receiving groove 21c of the lower-stage treadboard 20 are positioned on a same vertical line.SELECTED DRAWING: Figure 1 【課題】開放感を有し、かつ、階段下からの目線を遮りつつ、意匠性を高めることができる階段を提供すること。【解決手段】略水平に延在される平面視略長方形板状の踏板部２１を備え、踏板部２１の手前側端部の縁部から垂下された垂下フランジ部２２を備えるとともに、垂下フランジ部２２の下端部に、下方に山形状の水切部２２ａを備え踏板部２１の上面の奥側端縁部に沿って、水受け溝２１ｃが形成されている段板２０により形成された階段であって、左右一対のささら桁１０，１０に設けられた段板接合金具３０，３０に、板状の段板受金具４０が架け渡され、段板受金具４０に段板２０が、垂下フランジ部２２側を階段手前に配置して支持され、かつ、上段側の段板２０の水切部２２ａと、下段側の段板２０の水受け溝２１ｃと、が同一鉛直線上に配置されていることを特徴とする階段とした。【選択図】図１