按結構形(xing)式和受力特點樓梯形(xing)式可分為(wei)板式、梁式、懸挑(剪刀)式和螺旋(xuan)式，前兩種(zhong)屬于平面受力體(ti)系(xi)，后兩種(zhong)則為(wei)空間受力體(ti)系(xi)。

板(ban)(ban)(ban)式(shi)樓(lou)梯是由梯段板(ban)(ban)(ban)、平(ping)臺(tai)(tai)板(ban)(ban)(ban)和平(ping)臺(tai)(tai)梁組(zu)成(cheng)。梯段板(ban)(ban)(ban)是一(yi)塊帶(dai)踏步的(de)斜(xie)板(ban)(ban)(ban)，斜(xie)板(ban)(ban)(ban)支(zhi)承于(yu)上(shang)、下(xia)平(ping)臺(tai)(tai)梁上(shang)，底層下(xia)端支(zhi)承在地壟墻上(shang)。板(ban)(ban)(ban)式(shi)樓(lou)梯的(de)優點是梯段板(ban)(ban)(ban)下(xia)表面平(ping)整，支(zhi)模(mo)簡(jian)單(dan);其缺點是梯段板(ban)(ban)(ban)跨度(du)較大時，斜(xie)板(ban)(ban)(ban)厚(hou)度(du)較大，結(jie)構材料用(yong)量較多。因(yin)此板(ban)(ban)(ban)式(shi)樓(lou)梯適用(yong)于(yu)可變荷載(zai)較小、梯段板(ban)(ban)(ban)跨度(du)一(yi)般不大于(yu)3m的(de)情況。