按結構形式和(he)受(shou)力特點樓梯形式可(ke)分為(wei)板式、梁式、懸挑(剪刀)式和(he)螺旋式，前(qian)兩種(zhong)屬于(yu)平面受(shou)力體系，后兩種(zhong)則(ze)為(wei)空間受(shou)力體系。

板(ban)(ban)式樓梯(ti)是由梯(ti)段(duan)板(ban)(ban)、平臺(tai)板(ban)(ban)和平臺(tai)梁(liang)組成。梯(ti)段(duan)板(ban)(ban)是一塊(kuai)帶(dai)踏(ta)步的斜(xie)板(ban)(ban)，斜(xie)板(ban)(ban)支(zhi)承(cheng)于上、下平臺(tai)梁(liang)上，底層(ceng)下端支(zhi)承(cheng)在地壟(long)墻(qiang)上。板(ban)(ban)式樓梯(ti)的優點(dian)(dian)是梯(ti)段(duan)板(ban)(ban)下表面(mian)平整，支(zhi)模簡單;其(qi)缺點(dian)(dian)是梯(ti)段(duan)板(ban)(ban)跨度(du)較大時，斜(xie)板(ban)(ban)厚(hou)度(du)較大，結構材料用量(liang)較多。因(yin)此板(ban)(ban)式樓梯(ti)適用于可變荷(he)載(zai)較小(xiao)、梯(ti)段(duan)板(ban)(ban)跨度(du)一般(ban)不大于3m的情況。