按(an)結構(gou)形(xing)式(shi)(shi)(shi)和受(shou)(shou)力特點樓梯形(xing)式(shi)(shi)(shi)可分為板式(shi)(shi)(shi)、梁式(shi)(shi)(shi)、懸挑(剪刀)式(shi)(shi)(shi)和螺旋式(shi)(shi)(shi)，前兩種(zhong)屬于平面受(shou)(shou)力體系，后(hou)兩種(zhong)則為空間受(shou)(shou)力體系。

板(ban)(ban)(ban)式樓梯(ti)(ti)(ti)是(shi)由梯(ti)(ti)(ti)段板(ban)(ban)(ban)、平(ping)臺(tai)板(ban)(ban)(ban)和平(ping)臺(tai)梁組成(cheng)。梯(ti)(ti)(ti)段板(ban)(ban)(ban)是(shi)一塊(kuai)帶踏步的斜板(ban)(ban)(ban)，斜板(ban)(ban)(ban)支承于(yu)上(shang)、下(xia)(xia)平(ping)臺(tai)梁上(shang)，底層下(xia)(xia)端(duan)支承在地壟(long)墻上(shang)。板(ban)(ban)(ban)式樓梯(ti)(ti)(ti)的優點是(shi)梯(ti)(ti)(ti)段板(ban)(ban)(ban)下(xia)(xia)表面平(ping)整，支模簡單;其缺點是(shi)梯(ti)(ti)(ti)段板(ban)(ban)(ban)跨度較(jiao)大時，斜板(ban)(ban)(ban)厚(hou)度較(jiao)大，結構材料用(yong)量較(jiao)多。因此(ci)板(ban)(ban)(ban)式樓梯(ti)(ti)(ti)適(shi)用(yong)于(yu)可(ke)變荷載較(jiao)小(xiao)、梯(ti)(ti)(ti)段板(ban)(ban)(ban)跨度一般不(bu)大于(yu)3m的情況。