按(an)結構形式(shi)和受力特點(dian)樓梯形式(shi)可分為板式(shi)、梁式(shi)、懸挑(剪刀)式(shi)和螺旋(xuan)式(shi)，前兩(liang)種(zhong)屬于平面受力體系，后兩(liang)種(zhong)則為空間受力體系。

板(ban)(ban)(ban)式(shi)樓(lou)(lou)梯(ti)(ti)是由梯(ti)(ti)段(duan)板(ban)(ban)(ban)、平(ping)(ping)臺(tai)板(ban)(ban)(ban)和平(ping)(ping)臺(tai)梁(liang)組成。梯(ti)(ti)段(duan)板(ban)(ban)(ban)是一(yi)塊帶踏(ta)步的(de)斜(xie)板(ban)(ban)(ban)，斜(xie)板(ban)(ban)(ban)支承于(yu)上、下(xia)平(ping)(ping)臺(tai)梁(liang)上，底層(ceng)下(xia)端支承在地壟墻上。板(ban)(ban)(ban)式(shi)樓(lou)(lou)梯(ti)(ti)的(de)優點是梯(ti)(ti)段(duan)板(ban)(ban)(ban)下(xia)表面平(ping)(ping)整，支模(mo)簡單;其(qi)缺點是梯(ti)(ti)段(duan)板(ban)(ban)(ban)跨度較(jiao)大(da)時，斜(xie)板(ban)(ban)(ban)厚度較(jiao)大(da)，結構材料用(yong)量較(jiao)多(duo)。因此板(ban)(ban)(ban)式(shi)樓(lou)(lou)梯(ti)(ti)適(shi)用(yong)于(yu)可變荷載較(jiao)小、梯(ti)(ti)段(duan)板(ban)(ban)(ban)跨度一(yi)般不大(da)于(yu)3m的(de)情(qing)況(kuang)。