木(mu)樓(lou)梯(ti)

因(yin)不能防火，應用(yong)(yong)范圍受到限制。有(you)暗步式(shi)(shi)和明步式(shi)(shi)兩種。踏步鑲嵌于樓(lou)梯(ti)(ti)斜梁(又稱樓(lou)梯(ti)(ti)幫(bang))凹(ao)槽內的為(wei)暗步式(shi)(shi);釘于斜梁三角木上的為(wei)明步式(shi)(shi)。木樓(lou)梯(ti)(ti)表面用(yong)(yong)涂(tu)料防腐(fu)。