按(an)結構形式和受(shou)力特點樓梯(ti)形式可分(fen)為板(ban)式、梁式、懸挑(tiao)(剪刀)式和螺旋式，前兩(liang)種(zhong)屬于平面(mian)受(shou)力體(ti)(ti)系(xi)，后兩(liang)種(zhong)則(ze)為空(kong)間受(shou)力體(ti)(ti)系(xi)。

板(ban)(ban)(ban)式樓梯(ti)是由(you)梯(ti)段(duan)板(ban)(ban)(ban)、平(ping)臺(tai)板(ban)(ban)(ban)和平(ping)臺(tai)梁組成(cheng)。梯(ti)段(duan)板(ban)(ban)(ban)是一塊帶踏步的(de)斜(xie)(xie)板(ban)(ban)(ban)，斜(xie)(xie)板(ban)(ban)(ban)支(zhi)(zhi)承于(yu)(yu)上、下(xia)平(ping)臺(tai)梁上，底層下(xia)端支(zhi)(zhi)承在地(di)壟墻上。板(ban)(ban)(ban)式樓梯(ti)的(de)優(you)點(dian)是梯(ti)段(duan)板(ban)(ban)(ban)下(xia)表(biao)面(mian)平(ping)整(zheng)，支(zhi)(zhi)模簡單;其(qi)缺點(dian)是梯(ti)段(duan)板(ban)(ban)(ban)跨(kua)度較(jiao)(jiao)大(da)時，斜(xie)(xie)板(ban)(ban)(ban)厚(hou)度較(jiao)(jiao)大(da)，結構材料用量較(jiao)(jiao)多。因此(ci)板(ban)(ban)(ban)式樓梯(ti)適用于(yu)(yu)可變荷(he)載較(jiao)(jiao)小(xiao)、梯(ti)段(duan)板(ban)(ban)(ban)跨(kua)度一般不大(da)于(yu)(yu)3m的(de)情況。