按結構形(xing)式(shi)和受(shou)力特點樓(lou)梯(ti)形(xing)式(shi)可分為(wei)板式(shi)、梁式(shi)、懸挑(剪(jian)刀)式(shi)和螺旋(xuan)式(shi)，前兩(liang)種屬于(yu)平(ping)面受(shou)力體(ti)(ti)系，后兩(liang)種則(ze)為(wei)空間受(shou)力體(ti)(ti)系。

板(ban)(ban)(ban)(ban)(ban)式樓梯是(shi)由梯段(duan)板(ban)(ban)(ban)(ban)(ban)、平臺(tai)板(ban)(ban)(ban)(ban)(ban)和平臺(tai)梁組成。梯段(duan)板(ban)(ban)(ban)(ban)(ban)是(shi)一(yi)塊帶踏步的斜板(ban)(ban)(ban)(ban)(ban)，斜板(ban)(ban)(ban)(ban)(ban)支承(cheng)于上(shang)(shang)、下平臺(tai)梁上(shang)(shang)，底(di)層下端支承(cheng)在地壟墻上(shang)(shang)。板(ban)(ban)(ban)(ban)(ban)式樓梯的優(you)點是(shi)梯段(duan)板(ban)(ban)(ban)(ban)(ban)下表面平整，支模簡單(dan);其缺點是(shi)梯段(duan)板(ban)(ban)(ban)(ban)(ban)跨(kua)度(du)(du)較大時，斜板(ban)(ban)(ban)(ban)(ban)厚度(du)(du)較大，結構材料(liao)用量較多。因(yin)此板(ban)(ban)(ban)(ban)(ban)式樓梯適用于可變荷載較小、梯段(duan)板(ban)(ban)(ban)(ban)(ban)跨(kua)度(du)(du)一(yi)般不大于3m的情況。