木樓(lou)梯(ti)

因(yin)不能防火，應用范圍受到限制。有(you)暗(an)(an)步(bu)式(shi)和(he)明(ming)步(bu)式(shi)兩種(zhong)。踏步(bu)鑲嵌(qian)于(yu)(yu)樓(lou)梯(ti)斜梁(又稱樓(lou)梯(ti)幫)凹槽內的為(wei)暗(an)(an)步(bu)式(shi);釘于(yu)(yu)斜梁三角木(mu)上的為(wei)明(ming)步(bu)式(shi)。木(mu)樓(lou)梯(ti)表面用涂料防腐。