木樓梯

因不能防(fang)火，應用(yong)范圍受到限制。有暗(an)步(bu)式(shi)(shi)和明(ming)(ming)步(bu)式(shi)(shi)兩種。踏(ta)步(bu)鑲(xiang)嵌于樓(lou)(lou)(lou)梯(ti)(ti)斜(xie)梁(又稱樓(lou)(lou)(lou)梯(ti)(ti)幫)凹槽內的為暗(an)步(bu)式(shi)(shi);釘(ding)于斜(xie)梁三角木上的為明(ming)(ming)步(bu)式(shi)(shi)。木樓(lou)(lou)(lou)梯(ti)(ti)表面用(yong)涂料防(fang)腐(fu)。