木(mu)樓(lou)梯

因不能防(fang)火，應用(yong)范圍受到限(xian)制(zhi)。有暗步(bu)式(shi)和明(ming)步(bu)式(shi)兩種(zhong)。踏步(bu)鑲嵌于樓(lou)梯斜梁(又稱樓(lou)梯幫)凹槽內的為(wei)(wei)暗步(bu)式(shi);釘(ding)于斜梁三角木(mu)上的為(wei)(wei)明(ming)步(bu)式(shi)。木(mu)樓(lou)梯表面用(yong)涂料防(fang)腐。