按(an)結構形式(shi)和受力(li)特點樓梯(ti)形式(shi)可分為板(ban)式(shi)、梁式(shi)、懸挑(剪刀)式(shi)和螺(luo)旋式(shi)，前兩種(zhong)(zhong)屬于平面受力(li)體(ti)系，后兩種(zhong)(zhong)則為空間(jian)受力(li)體(ti)系。

板(ban)(ban)式(shi)樓(lou)梯是(shi)由梯段(duan)板(ban)(ban)、平(ping)臺板(ban)(ban)和平(ping)臺梁(liang)組成。梯段(duan)板(ban)(ban)是(shi)一塊帶踏步的(de)斜板(ban)(ban)，斜板(ban)(ban)支(zhi)承于上、下平(ping)臺梁(liang)上，底(di)層下端支(zhi)承在地壟墻(qiang)上。板(ban)(ban)式(shi)樓(lou)梯的(de)優(you)點是(shi)梯段(duan)板(ban)(ban)下表面平(ping)整，支(zhi)模簡單;其缺點是(shi)梯段(duan)板(ban)(ban)跨(kua)度較大時，斜板(ban)(ban)厚度較大，結構材料(liao)用(yong)量較多。因(yin)此板(ban)(ban)式(shi)樓(lou)梯適(shi)用(yong)于可變荷載較小、梯段(duan)板(ban)(ban)跨(kua)度一般不(bu)大于3m的(de)情況。