木樓梯

因不能(neng)防火(huo)，應用(yong)范圍受到限制。有暗(an)步(bu)(bu)式(shi)(shi)和明步(bu)(bu)式(shi)(shi)兩(liang)種。踏步(bu)(bu)鑲嵌于(yu)樓(lou)梯斜梁(又稱樓(lou)梯幫)凹(ao)槽內的為暗(an)步(bu)(bu)式(shi)(shi);釘(ding)于(yu)斜梁三(san)角木(mu)(mu)上的為明步(bu)(bu)式(shi)(shi)。木(mu)(mu)樓(lou)梯表面用(yong)涂料防腐。