按結構形(xing)式(shi)和受力(li)(li)特(te)點樓梯形(xing)式(shi)可(ke)分為(wei)板式(shi)、梁(liang)式(shi)、懸(xuan)挑(tiao)(剪刀)式(shi)和螺(luo)旋式(shi)，前兩(liang)種(zhong)屬(shu)于平(ping)面(mian)受力(li)(li)體系，后兩(liang)種(zhong)則為(wei)空(kong)間受力(li)(li)體系。

板(ban)(ban)(ban)(ban)式(shi)樓梯是(shi)(shi)由梯段(duan)板(ban)(ban)(ban)(ban)、平臺板(ban)(ban)(ban)(ban)和(he)平臺梁組成。梯段(duan)板(ban)(ban)(ban)(ban)是(shi)(shi)一塊(kuai)帶踏步的(de)斜板(ban)(ban)(ban)(ban)，斜板(ban)(ban)(ban)(ban)支(zhi)承(cheng)于(yu)上、下平臺梁上，底層下端支(zhi)承(cheng)在地壟墻上。板(ban)(ban)(ban)(ban)式(shi)樓梯的(de)優點是(shi)(shi)梯段(duan)板(ban)(ban)(ban)(ban)下表(biao)面平整，支(zhi)模簡單;其缺點是(shi)(shi)梯段(duan)板(ban)(ban)(ban)(ban)跨度(du)較大(da)時，斜板(ban)(ban)(ban)(ban)厚(hou)度(du)較大(da)，結構材(cai)料用量較多(duo)。因此板(ban)(ban)(ban)(ban)式(shi)樓梯適用于(yu)可變荷(he)載較小、梯段(duan)板(ban)(ban)(ban)(ban)跨度(du)一般不大(da)于(yu)3m的(de)情(qing)況。