按結構形式(shi)(shi)和受力特點(dian)樓(lou)梯(ti)形式(shi)(shi)可(ke)分為(wei)板式(shi)(shi)、梁式(shi)(shi)、懸(xuan)挑(剪刀(dao))式(shi)(shi)和螺旋式(shi)(shi)，前兩種(zhong)屬(shu)于(yu)平面受力體系，后(hou)兩種(zhong)則(ze)為(wei)空間(jian)受力體系。

板(ban)(ban)式樓梯(ti)是由梯(ti)段(duan)(duan)板(ban)(ban)、平臺(tai)(tai)板(ban)(ban)和平臺(tai)(tai)梁(liang)(liang)組成。梯(ti)段(duan)(duan)板(ban)(ban)是一(yi)塊帶踏步的斜板(ban)(ban)，斜板(ban)(ban)支(zhi)承于上、下平臺(tai)(tai)梁(liang)(liang)上，底層下端支(zhi)承在地壟墻(qiang)上。板(ban)(ban)式樓梯(ti)的優點是梯(ti)段(duan)(duan)板(ban)(ban)下表面(mian)平整(zheng)，支(zhi)模簡單(dan);其缺點是梯(ti)段(duan)(duan)板(ban)(ban)跨度(du)較(jiao)大時，斜板(ban)(ban)厚度(du)較(jiao)大，結構材料用量較(jiao)多。因此板(ban)(ban)式樓梯(ti)適用于可變荷載較(jiao)小、梯(ti)段(duan)(duan)板(ban)(ban)跨度(du)一(yi)般不大于3m的情況。