按(an)結構形式(shi)(shi)和受(shou)力(li)特點(dian)樓梯形式(shi)(shi)可分為板式(shi)(shi)、梁式(shi)(shi)、懸挑(剪刀)式(shi)(shi)和螺旋(xuan)式(shi)(shi)，前兩種屬于(yu)平面受(shou)力(li)體(ti)(ti)系，后兩種則(ze)為空間受(shou)力(li)體(ti)(ti)系。

板(ban)(ban)式樓梯(ti)(ti)(ti)(ti)是(shi)(shi)(shi)由梯(ti)(ti)(ti)(ti)段板(ban)(ban)、平臺(tai)板(ban)(ban)和平臺(tai)梁組(zu)成。梯(ti)(ti)(ti)(ti)段板(ban)(ban)是(shi)(shi)(shi)一(yi)塊帶踏(ta)步的(de)斜(xie)板(ban)(ban)，斜(xie)板(ban)(ban)支承于上(shang)、下(xia)平臺(tai)梁上(shang)，底層下(xia)端支承在地壟墻(qiang)上(shang)。板(ban)(ban)式樓梯(ti)(ti)(ti)(ti)的(de)優點是(shi)(shi)(shi)梯(ti)(ti)(ti)(ti)段板(ban)(ban)下(xia)表面平整，支模簡單;其缺點是(shi)(shi)(shi)梯(ti)(ti)(ti)(ti)段板(ban)(ban)跨度較(jiao)大時(shi)，斜(xie)板(ban)(ban)厚度較(jiao)大，結構材料用量較(jiao)多。因此板(ban)(ban)式樓梯(ti)(ti)(ti)(ti)適用于可變荷載較(jiao)小、梯(ti)(ti)(ti)(ti)段板(ban)(ban)跨度一(yi)般不(bu)大于3m的(de)情況。