按結構形(xing)式(shi)(shi)和(he)受(shou)(shou)力特點(dian)樓梯形(xing)式(shi)(shi)可分為(wei)板式(shi)(shi)、梁式(shi)(shi)、懸挑(剪刀)式(shi)(shi)和(he)螺旋(xuan)式(shi)(shi)，前(qian)兩(liang)種屬(shu)于平面受(shou)(shou)力體系，后兩(liang)種則(ze)為(wei)空間受(shou)(shou)力體系。

板(ban)(ban)式樓梯(ti)(ti)(ti)是由(you)梯(ti)(ti)(ti)段(duan)(duan)板(ban)(ban)、平(ping)臺板(ban)(ban)和平(ping)臺梁組成。梯(ti)(ti)(ti)段(duan)(duan)板(ban)(ban)是一塊帶踏步的(de)斜(xie)板(ban)(ban)，斜(xie)板(ban)(ban)支承于上(shang)、下平(ping)臺梁上(shang)，底層下端支承在地(di)壟(long)墻上(shang)。板(ban)(ban)式樓梯(ti)(ti)(ti)的(de)優(you)點是梯(ti)(ti)(ti)段(duan)(duan)板(ban)(ban)下表面平(ping)整，支模簡單;其缺點是梯(ti)(ti)(ti)段(duan)(duan)板(ban)(ban)跨度(du)(du)較大時，斜(xie)板(ban)(ban)厚度(du)(du)較大，結構材料用(yong)量較多。因此(ci)板(ban)(ban)式樓梯(ti)(ti)(ti)適用(yong)于可變(bian)荷載較小、梯(ti)(ti)(ti)段(duan)(duan)板(ban)(ban)跨度(du)(du)一般不大于3m的(de)情(qing)況。