按結構形(xing)式(shi)和受力特點樓梯(ti)形(xing)式(shi)可分(fen)為板式(shi)、梁式(shi)、懸挑(tiao)(剪刀)式(shi)和螺旋式(shi)，前兩種屬于平面受力體系，后兩種則為空間受力體系。

板(ban)(ban)(ban)(ban)式樓梯(ti)(ti)是(shi)由梯(ti)(ti)段(duan)板(ban)(ban)(ban)(ban)、平(ping)臺(tai)板(ban)(ban)(ban)(ban)和平(ping)臺(tai)梁(liang)組成。梯(ti)(ti)段(duan)板(ban)(ban)(ban)(ban)是(shi)一(yi)塊帶(dai)踏步(bu)的(de)(de)斜(xie)板(ban)(ban)(ban)(ban)，斜(xie)板(ban)(ban)(ban)(ban)支(zhi)承于(yu)上(shang)、下(xia)平(ping)臺(tai)梁(liang)上(shang)，底(di)層下(xia)端支(zhi)承在地壟墻上(shang)。板(ban)(ban)(ban)(ban)式樓梯(ti)(ti)的(de)(de)優點是(shi)梯(ti)(ti)段(duan)板(ban)(ban)(ban)(ban)下(xia)表面平(ping)整，支(zhi)模簡單;其缺點是(shi)梯(ti)(ti)段(duan)板(ban)(ban)(ban)(ban)跨度較(jiao)大(da)時，斜(xie)板(ban)(ban)(ban)(ban)厚度較(jiao)大(da)，結(jie)構材(cai)料用量(liang)較(jiao)多。因此板(ban)(ban)(ban)(ban)式樓梯(ti)(ti)適用于(yu)可變(bian)荷載較(jiao)小、梯(ti)(ti)段(duan)板(ban)(ban)(ban)(ban)跨度一(yi)般不(bu)大(da)于(yu)3m的(de)(de)情況。