木(mu)樓梯

因不能防(fang)火，應用(yong)范圍受(shou)到限制。有暗步(bu)(bu)式(shi)(shi)(shi)和明步(bu)(bu)式(shi)(shi)(shi)兩種。踏步(bu)(bu)鑲嵌于樓(lou)梯斜梁(又稱樓(lou)梯幫(bang))凹槽內(nei)的為暗步(bu)(bu)式(shi)(shi)(shi);釘(ding)于斜梁三(san)角木上(shang)的為明步(bu)(bu)式(shi)(shi)(shi)。木樓(lou)梯表面用(yong)涂料防(fang)腐。