按結構形(xing)(xing)式和(he)受力特點樓梯形(xing)(xing)式可分為(wei)板式、梁式、懸挑(剪刀(dao))式和(he)螺旋(xuan)式，前(qian)兩(liang)(liang)種(zhong)屬于平面(mian)受力體系，后(hou)兩(liang)(liang)種(zhong)則(ze)為(wei)空間受力體系。

板(ban)(ban)(ban)式樓梯(ti)(ti)是(shi)由梯(ti)(ti)段(duan)(duan)板(ban)(ban)(ban)、平(ping)臺(tai)板(ban)(ban)(ban)和平(ping)臺(tai)梁組成。梯(ti)(ti)段(duan)(duan)板(ban)(ban)(ban)是(shi)一塊帶踏步的斜板(ban)(ban)(ban)，斜板(ban)(ban)(ban)支(zhi)承(cheng)于上、下(xia)平(ping)臺(tai)梁上，底層下(xia)端支(zhi)承(cheng)在地壟墻上。板(ban)(ban)(ban)式樓梯(ti)(ti)的優點是(shi)梯(ti)(ti)段(duan)(duan)板(ban)(ban)(ban)下(xia)表(biao)面平(ping)整，支(zhi)模(mo)簡(jian)單;其缺點是(shi)梯(ti)(ti)段(duan)(duan)板(ban)(ban)(ban)跨度較(jiao)大(da)時，斜板(ban)(ban)(ban)厚度較(jiao)大(da)，結構(gou)材料(liao)用(yong)量較(jiao)多。因此板(ban)(ban)(ban)式樓梯(ti)(ti)適用(yong)于可變荷載較(jiao)小、梯(ti)(ti)段(duan)(duan)板(ban)(ban)(ban)跨度一般(ban)不(bu)大(da)于3m的情況。