按結構形式和(he)(he)受力特點樓(lou)梯(ti)形式可分為板式、梁式、懸挑(剪(jian)刀(dao))式和(he)(he)螺旋(xuan)式，前兩(liang)種屬于平(ping)面受力體系，后兩(liang)種則為空(kong)間受力體系。

板(ban)(ban)式(shi)樓梯是由梯段板(ban)(ban)、平臺(tai)板(ban)(ban)和平臺(tai)梁組成(cheng)。梯段板(ban)(ban)是一塊(kuai)帶踏步(bu)的斜(xie)(xie)板(ban)(ban)，斜(xie)(xie)板(ban)(ban)支(zhi)承(cheng)于上(shang)、下(xia)平臺(tai)梁上(shang)，底(di)層下(xia)端(duan)支(zhi)承(cheng)在地(di)壟墻上(shang)。板(ban)(ban)式(shi)樓梯的優點是梯段板(ban)(ban)下(xia)表面平整，支(zhi)模簡單;其缺點是梯段板(ban)(ban)跨度(du)較(jiao)大時，斜(xie)(xie)板(ban)(ban)厚(hou)度(du)較(jiao)大，結(jie)構材料用量較(jiao)多。因此(ci)板(ban)(ban)式(shi)樓梯適用于可變荷載較(jiao)小、梯段板(ban)(ban)跨度(du)一般不(bu)大于3m的情況。