按結構形式和受力(li)特點(dian)樓(lou)梯形式可(ke)分為(wei)板式、梁式、懸挑(tiao)(剪刀)式和螺(luo)旋式，前兩種(zhong)屬于平面受力(li)體系(xi)，后兩種(zhong)則為(wei)空間(jian)受力(li)體系(xi)。

板(ban)(ban)式(shi)樓梯(ti)是(shi)由梯(ti)段(duan)板(ban)(ban)、平(ping)(ping)臺(tai)板(ban)(ban)和平(ping)(ping)臺(tai)梁組成。梯(ti)段(duan)板(ban)(ban)是(shi)一塊帶(dai)踏步的斜(xie)板(ban)(ban)，斜(xie)板(ban)(ban)支(zhi)(zhi)承于上(shang)、下(xia)(xia)平(ping)(ping)臺(tai)梁上(shang)，底層下(xia)(xia)端(duan)支(zhi)(zhi)承在地壟墻(qiang)上(shang)。板(ban)(ban)式(shi)樓梯(ti)的優點(dian)是(shi)梯(ti)段(duan)板(ban)(ban)下(xia)(xia)表面平(ping)(ping)整，支(zhi)(zhi)模簡單;其缺點(dian)是(shi)梯(ti)段(duan)板(ban)(ban)跨(kua)度(du)較大時，斜(xie)板(ban)(ban)厚度(du)較大，結構材料(liao)用量較多(duo)。因此板(ban)(ban)式(shi)樓梯(ti)適(shi)用于可變(bian)荷(he)載較小、梯(ti)段(duan)板(ban)(ban)跨(kua)度(du)一般不(bu)大于3m的情(qing)況。