按結構形(xing)式(shi)和受力(li)特(te)點樓梯形(xing)式(shi)可分為板式(shi)、梁式(shi)、懸挑(剪刀)式(shi)和螺旋式(shi)，前(qian)兩種(zhong)屬于平面(mian)受力(li)體(ti)系(xi)(xi)，后兩種(zhong)則(ze)為空間受力(li)體(ti)系(xi)(xi)。

板(ban)(ban)式樓梯(ti)(ti)是由梯(ti)(ti)段(duan)(duan)板(ban)(ban)、平(ping)臺板(ban)(ban)和平(ping)臺梁組成(cheng)。梯(ti)(ti)段(duan)(duan)板(ban)(ban)是一塊帶踏步的(de)斜板(ban)(ban)，斜板(ban)(ban)支(zhi)承于(yu)上、下平(ping)臺梁上，底層下端支(zhi)承在地壟墻上。板(ban)(ban)式樓梯(ti)(ti)的(de)優點是梯(ti)(ti)段(duan)(duan)板(ban)(ban)下表面平(ping)整，支(zhi)模簡單;其缺點是梯(ti)(ti)段(duan)(duan)板(ban)(ban)跨度較(jiao)(jiao)大時(shi)，斜板(ban)(ban)厚度較(jiao)(jiao)大，結(jie)構材料(liao)用(yong)量(liang)較(jiao)(jiao)多。因(yin)此板(ban)(ban)式樓梯(ti)(ti)適用(yong)于(yu)可變荷載(zai)較(jiao)(jiao)小、梯(ti)(ti)段(duan)(duan)板(ban)(ban)跨度一般不大于(yu)3m的(de)情(qing)況。