按結(jie)構形式(shi)(shi)(shi)和受(shou)力特點樓(lou)梯(ti)形式(shi)(shi)(shi)可(ke)分為板式(shi)(shi)(shi)、梁式(shi)(shi)(shi)、懸挑(剪刀)式(shi)(shi)(shi)和螺旋式(shi)(shi)(shi)，前兩種屬于平(ping)面受(shou)力體系(xi)，后兩種則為空間(jian)受(shou)力體系(xi)。

板(ban)(ban)式樓梯(ti)(ti)是由梯(ti)(ti)段(duan)板(ban)(ban)、平臺板(ban)(ban)和(he)平臺梁組成。梯(ti)(ti)段(duan)板(ban)(ban)是一(yi)塊帶踏步的(de)斜板(ban)(ban)，斜板(ban)(ban)支(zhi)承于(yu)上(shang)、下(xia)(xia)平臺梁上(shang)，底層下(xia)(xia)端(duan)支(zhi)承在地(di)壟墻上(shang)。板(ban)(ban)式樓梯(ti)(ti)的(de)優點是梯(ti)(ti)段(duan)板(ban)(ban)下(xia)(xia)表面平整(zheng)，支(zhi)模(mo)簡(jian)單;其缺點是梯(ti)(ti)段(duan)板(ban)(ban)跨度較大時，斜板(ban)(ban)厚度較大，結構材料用量較多。因此板(ban)(ban)式樓梯(ti)(ti)適用于(yu)可變(bian)荷載(zai)較小、梯(ti)(ti)段(duan)板(ban)(ban)跨度一(yi)般不大于(yu)3m的(de)情況。