木樓梯

因(yin)不能(neng)防(fang)火，應(ying)用范圍受到限制。有暗步(bu)(bu)(bu)式(shi)(shi)和明(ming)(ming)步(bu)(bu)(bu)式(shi)(shi)兩種(zhong)。踏步(bu)(bu)(bu)鑲嵌于樓(lou)梯(ti)斜梁(又稱(cheng)樓(lou)梯(ti)幫)凹槽內的為(wei)暗步(bu)(bu)(bu)式(shi)(shi);釘于斜梁三角木上的為(wei)明(ming)(ming)步(bu)(bu)(bu)式(shi)(shi)。木樓(lou)梯(ti)表面用涂料防(fang)腐(fu)。