按結構形(xing)式和受力特點樓梯形(xing)式可(ke)分為板式、梁式、懸挑(剪刀(dao))式和螺(luo)旋式，前(qian)兩種(zhong)屬于平面(mian)受力體(ti)系，后兩種(zhong)則為空間受力體(ti)系。

板(ban)(ban)式樓(lou)梯(ti)是由梯(ti)段(duan)(duan)板(ban)(ban)、平臺(tai)(tai)板(ban)(ban)和平臺(tai)(tai)梁組成。梯(ti)段(duan)(duan)板(ban)(ban)是一塊帶踏步(bu)的(de)斜板(ban)(ban)，斜板(ban)(ban)支承于(yu)(yu)上、下(xia)平臺(tai)(tai)梁上，底層(ceng)下(xia)端支承在地壟墻上。板(ban)(ban)式樓(lou)梯(ti)的(de)優點(dian)是梯(ti)段(duan)(duan)板(ban)(ban)下(xia)表面平整，支模簡單;其缺點(dian)是梯(ti)段(duan)(duan)板(ban)(ban)跨度(du)較大時，斜板(ban)(ban)厚(hou)度(du)較大，結(jie)構材料(liao)用(yong)量較多。因此板(ban)(ban)式樓(lou)梯(ti)適用(yong)于(yu)(yu)可變荷載較小(xiao)、梯(ti)段(duan)(duan)板(ban)(ban)跨度(du)一般不大于(yu)(yu)3m的(de)情況。