木樓(lou)梯(ti)

因不(bu)能防火(huo)，應用(yong)范圍(wei)受到限制。有(you)暗步(bu)(bu)式(shi)和明(ming)(ming)步(bu)(bu)式(shi)兩種。踏步(bu)(bu)鑲嵌于(yu)樓(lou)(lou)梯斜梁(又稱樓(lou)(lou)梯幫)凹槽內(nei)的為(wei)(wei)暗步(bu)(bu)式(shi);釘于(yu)斜梁三(san)角木(mu)上的為(wei)(wei)明(ming)(ming)步(bu)(bu)式(shi)。木(mu)樓(lou)(lou)梯表面用(yong)涂料防腐。