按結構形式和受(shou)力(li)特點樓梯形式可分為(wei)板式、梁式、懸挑(tiao)(剪(jian)刀)式和螺(luo)旋式，前兩種屬于平(ping)面受(shou)力(li)體系，后兩種則為(wei)空間受(shou)力(li)體系。
板(ban)(ban)式(shi)(shi)樓梯(ti)是(shi)由梯(ti)段(duan)板(ban)(ban)、平臺(tai)板(ban)(ban)和平臺(tai)梁(liang)組成(cheng)。梯(ti)段(duan)板(ban)(ban)是(shi)一塊帶踏步(bu)的(de)(de)斜(xie)板(ban)(ban)，斜(xie)板(ban)(ban)支(zhi)承于上(shang)、下平臺(tai)梁(liang)上(shang)，底(di)層下端支(zhi)承在(zai)地壟墻上(shang)。板(ban)(ban)式(shi)(shi)樓梯(ti)的(de)(de)優點(dian)是(shi)梯(ti)段(duan)板(ban)(ban)下表面(mian)平整，支(zhi)模簡(jian)單;其缺點(dian)是(shi)梯(ti)段(duan)板(ban)(ban)跨度較大(da)時，斜(xie)板(ban)(ban)厚度較大(da)，結構材(cai)料用(yong)量較多。因此板(ban)(ban)式(shi)(shi)樓梯(ti)適用(yong)于可變荷載較小、梯(ti)段(duan)板(ban)(ban)跨度一般不大(da)于3m的(de)(de)情況。
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