木樓梯

因不能防火，應用范圍受(shou)到(dao)限制。有暗步式(shi)和明(ming)步式(shi)兩種(zhong)。踏步鑲嵌于樓梯(ti)(ti)斜(xie)(xie)梁(liang)(又(you)稱(cheng)樓梯(ti)(ti)幫)凹槽內的為暗步式(shi);釘于斜(xie)(xie)梁(liang)三角木上的為明(ming)步式(shi)。木樓梯(ti)(ti)表面用涂料防腐。