木(mu)樓(lou)梯

因不能防(fang)(fang)火，應用范圍受到(dao)限(xian)制。有(you)暗(an)步(bu)式(shi)(shi)(shi)和(he)明(ming)步(bu)式(shi)(shi)(shi)兩種(zhong)。踏(ta)步(bu)鑲嵌(qian)于樓梯(ti)(ti)斜梁(liang)(又(you)稱樓梯(ti)(ti)幫)凹(ao)槽(cao)內的為(wei)暗(an)步(bu)式(shi)(shi)(shi);釘于斜梁(liang)三角木上的為(wei)明(ming)步(bu)式(shi)(shi)(shi)。木樓梯(ti)(ti)表面(mian)用涂料防(fang)(fang)腐。