按結構形式和(he)受力特點樓(lou)梯形式可分為板式、梁式、懸挑(剪刀)式和(he)螺旋式，前兩種(zhong)屬于平(ping)面受力體系，后兩種(zhong)則為空間受力體系。

板(ban)(ban)(ban)(ban)式樓(lou)梯(ti)(ti)是(shi)由(you)梯(ti)(ti)段(duan)板(ban)(ban)(ban)(ban)、平(ping)臺(tai)(tai)板(ban)(ban)(ban)(ban)和平(ping)臺(tai)(tai)梁組(zu)成(cheng)。梯(ti)(ti)段(duan)板(ban)(ban)(ban)(ban)是(shi)一(yi)塊帶踏(ta)步的斜(xie)板(ban)(ban)(ban)(ban)，斜(xie)板(ban)(ban)(ban)(ban)支(zhi)(zhi)承(cheng)于上、下平(ping)臺(tai)(tai)梁上，底層下端支(zhi)(zhi)承(cheng)在地壟(long)墻上。板(ban)(ban)(ban)(ban)式樓(lou)梯(ti)(ti)的優(you)點(dian)是(shi)梯(ti)(ti)段(duan)板(ban)(ban)(ban)(ban)下表面平(ping)整，支(zhi)(zhi)模(mo)簡單(dan);其缺點(dian)是(shi)梯(ti)(ti)段(duan)板(ban)(ban)(ban)(ban)跨(kua)度(du)(du)較(jiao)大時，斜(xie)板(ban)(ban)(ban)(ban)厚(hou)度(du)(du)較(jiao)大，結(jie)構材料用量較(jiao)多。因此板(ban)(ban)(ban)(ban)式樓(lou)梯(ti)(ti)適用于可變(bian)荷載較(jiao)小、梯(ti)(ti)段(duan)板(ban)(ban)(ban)(ban)跨(kua)度(du)(du)一(yi)般不大于3m的情況(kuang)。