按(an)結構形式和(he)(he)受力(li)特點(dian)樓梯形式可分為(wei)板式、梁式、懸挑(剪(jian)刀)式和(he)(he)螺旋式，前兩種(zhong)屬于平(ping)面受力(li)體系，后兩種(zhong)則為(wei)空間受力(li)體系。

板(ban)(ban)(ban)(ban)式(shi)樓梯是(shi)由梯段(duan)(duan)板(ban)(ban)(ban)(ban)、平臺板(ban)(ban)(ban)(ban)和平臺梁(liang)組成。梯段(duan)(duan)板(ban)(ban)(ban)(ban)是(shi)一塊帶踏步的(de)(de)斜(xie)板(ban)(ban)(ban)(ban)，斜(xie)板(ban)(ban)(ban)(ban)支承(cheng)于(yu)上、下平臺梁(liang)上，底層下端支承(cheng)在(zai)地壟墻上。板(ban)(ban)(ban)(ban)式(shi)樓梯的(de)(de)優點(dian)(dian)是(shi)梯段(duan)(duan)板(ban)(ban)(ban)(ban)下表面平整，支模簡單;其缺點(dian)(dian)是(shi)梯段(duan)(duan)板(ban)(ban)(ban)(ban)跨(kua)度(du)較(jiao)大時，斜(xie)板(ban)(ban)(ban)(ban)厚度(du)較(jiao)大，結構材料用量較(jiao)多(duo)。因此(ci)板(ban)(ban)(ban)(ban)式(shi)樓梯適用于(yu)可變荷載較(jiao)小、梯段(duan)(duan)板(ban)(ban)(ban)(ban)跨(kua)度(du)一般(ban)不大于(yu)3m的(de)(de)情況。