按(an)結構形式(shi)(shi)和(he)受(shou)力特點樓梯形式(shi)(shi)可分(fen)為板式(shi)(shi)、梁式(shi)(shi)、懸(xuan)挑(剪刀)式(shi)(shi)和(he)螺(luo)旋式(shi)(shi)，前兩(liang)種屬于平(ping)面受(shou)力體系(xi)，后(hou)兩(liang)種則為空間受(shou)力體系(xi)。

板(ban)(ban)(ban)(ban)式(shi)樓梯(ti)(ti)是(shi)(shi)由梯(ti)(ti)段板(ban)(ban)(ban)(ban)、平(ping)(ping)臺(tai)板(ban)(ban)(ban)(ban)和平(ping)(ping)臺(tai)梁組成。梯(ti)(ti)段板(ban)(ban)(ban)(ban)是(shi)(shi)一(yi)塊帶踏步的(de)斜(xie)板(ban)(ban)(ban)(ban)，斜(xie)板(ban)(ban)(ban)(ban)支(zhi)承(cheng)于(yu)(yu)上、下平(ping)(ping)臺(tai)梁上，底層下端(duan)支(zhi)承(cheng)在地壟墻上。板(ban)(ban)(ban)(ban)式(shi)樓梯(ti)(ti)的(de)優點是(shi)(shi)梯(ti)(ti)段板(ban)(ban)(ban)(ban)下表面(mian)平(ping)(ping)整，支(zhi)模簡單;其缺點是(shi)(shi)梯(ti)(ti)段板(ban)(ban)(ban)(ban)跨度(du)較(jiao)大時，斜(xie)板(ban)(ban)(ban)(ban)厚(hou)度(du)較(jiao)大，結構材料用量較(jiao)多。因(yin)此(ci)板(ban)(ban)(ban)(ban)式(shi)樓梯(ti)(ti)適(shi)用于(yu)(yu)可變荷(he)載(zai)較(jiao)小、梯(ti)(ti)段板(ban)(ban)(ban)(ban)跨度(du)一(yi)般不大于(yu)(yu)3m的(de)情況。