按(an)結構形式(shi)和受力特點樓(lou)梯形式(shi)可分(fen)為板式(shi)、梁(liang)式(shi)、懸挑(tiao)(剪刀)式(shi)和螺旋式(shi)，前兩種(zhong)屬于平面(mian)受力體系(xi)，后(hou)兩種(zhong)則為空間(jian)受力體系(xi)。

板(ban)(ban)式(shi)(shi)樓梯是(shi)(shi)由梯段(duan)板(ban)(ban)、平臺(tai)板(ban)(ban)和平臺(tai)梁(liang)組成。梯段(duan)板(ban)(ban)是(shi)(shi)一(yi)塊帶踏(ta)步的斜(xie)板(ban)(ban)，斜(xie)板(ban)(ban)支(zhi)承(cheng)于上(shang)、下平臺(tai)梁(liang)上(shang)，底層下端(duan)支(zhi)承(cheng)在地壟墻(qiang)上(shang)。板(ban)(ban)式(shi)(shi)樓梯的優點是(shi)(shi)梯段(duan)板(ban)(ban)下表面平整，支(zhi)模簡(jian)單;其缺點是(shi)(shi)梯段(duan)板(ban)(ban)跨度較大(da)時(shi)，斜(xie)板(ban)(ban)厚度較大(da)，結構材料用量較多(duo)。因此(ci)板(ban)(ban)式(shi)(shi)樓梯適(shi)用于可變荷載較小、梯段(duan)板(ban)(ban)跨度一(yi)般不大(da)于3m的情況。