按(an)結構形(xing)式和受力特點樓(lou)梯(ti)形(xing)式可(ke)分為(wei)板(ban)式、梁式、懸挑(剪刀)式和螺旋式，前(qian)兩(liang)種屬于平(ping)面受力體(ti)系(xi)，后兩(liang)種則(ze)為(wei)空(kong)間受力體(ti)系(xi)。

板(ban)(ban)式(shi)樓梯(ti)(ti)(ti)是由梯(ti)(ti)(ti)段(duan)(duan)(duan)板(ban)(ban)、平(ping)臺(tai)板(ban)(ban)和(he)平(ping)臺(tai)梁組成(cheng)。梯(ti)(ti)(ti)段(duan)(duan)(duan)板(ban)(ban)是一(yi)(yi)塊帶踏步的(de)斜板(ban)(ban)，斜板(ban)(ban)支(zhi)承(cheng)(cheng)于(yu)上(shang)、下平(ping)臺(tai)梁上(shang)，底(di)層下端支(zhi)承(cheng)(cheng)在地壟墻(qiang)上(shang)。板(ban)(ban)式(shi)樓梯(ti)(ti)(ti)的(de)優點是梯(ti)(ti)(ti)段(duan)(duan)(duan)板(ban)(ban)下表面(mian)平(ping)整，支(zhi)模(mo)簡單;其缺點是梯(ti)(ti)(ti)段(duan)(duan)(duan)板(ban)(ban)跨度較大時，斜板(ban)(ban)厚(hou)度較大，結構材料用(yong)(yong)量(liang)較多(duo)。因此板(ban)(ban)式(shi)樓梯(ti)(ti)(ti)適用(yong)(yong)于(yu)可變(bian)荷(he)載較小、梯(ti)(ti)(ti)段(duan)(duan)(duan)板(ban)(ban)跨度一(yi)(yi)般不大于(yu)3m的(de)情況。