木樓梯

因不能(neng)防火，應(ying)用(yong)范圍受到(dao)限制。有暗(an)步(bu)(bu)式(shi)(shi)和明(ming)步(bu)(bu)式(shi)(shi)兩種。踏(ta)步(bu)(bu)鑲嵌于樓(lou)梯斜梁(liang)(又稱樓(lou)梯幫)凹槽內的為暗(an)步(bu)(bu)式(shi)(shi);釘于斜梁(liang)三角木(mu)上的為明(ming)步(bu)(bu)式(shi)(shi)。木(mu)樓(lou)梯表面(mian)用(yong)涂(tu)料防腐。