木樓梯

因不能防火(huo)，應用(yong)范圍(wei)受(shou)到(dao)限(xian)制(zhi)。有暗步(bu)式(shi)(shi)(shi)和明(ming)步(bu)式(shi)(shi)(shi)兩種(zhong)。踏步(bu)鑲嵌于樓梯斜梁(又稱樓梯幫)凹槽(cao)內的(de)為暗步(bu)式(shi)(shi)(shi);釘于斜梁三角木(mu)上的(de)為明(ming)步(bu)式(shi)(shi)(shi)。木(mu)樓梯表面用(yong)涂(tu)料防腐。