按結(jie)構形式和受(shou)(shou)力(li)特點樓梯形式可分為(wei)板(ban)式、梁(liang)式、懸挑(tiao)(剪刀)式和螺旋式，前兩(liang)種屬于(yu)平面受(shou)(shou)力(li)體(ti)系，后(hou)兩(liang)種則為(wei)空間受(shou)(shou)力(li)體(ti)系。

板(ban)(ban)(ban)(ban)(ban)式樓梯(ti)(ti)(ti)是由梯(ti)(ti)(ti)段(duan)(duan)板(ban)(ban)(ban)(ban)(ban)、平臺板(ban)(ban)(ban)(ban)(ban)和平臺梁組成。梯(ti)(ti)(ti)段(duan)(duan)板(ban)(ban)(ban)(ban)(ban)是一(yi)塊帶踏步的斜(xie)板(ban)(ban)(ban)(ban)(ban)，斜(xie)板(ban)(ban)(ban)(ban)(ban)支承(cheng)于(yu)(yu)上、下平臺梁上，底層下端支承(cheng)在地壟墻上。板(ban)(ban)(ban)(ban)(ban)式樓梯(ti)(ti)(ti)的優點(dian)是梯(ti)(ti)(ti)段(duan)(duan)板(ban)(ban)(ban)(ban)(ban)下表面平整(zheng)，支模(mo)簡單(dan);其缺點(dian)是梯(ti)(ti)(ti)段(duan)(duan)板(ban)(ban)(ban)(ban)(ban)跨度較(jiao)大(da)時，斜(xie)板(ban)(ban)(ban)(ban)(ban)厚度較(jiao)大(da)，結構材料用量較(jiao)多。因此板(ban)(ban)(ban)(ban)(ban)式樓梯(ti)(ti)(ti)適(shi)用于(yu)(yu)可變荷載較(jiao)小、梯(ti)(ti)(ti)段(duan)(duan)板(ban)(ban)(ban)(ban)(ban)跨度一(yi)般(ban)不大(da)于(yu)(yu)3m的情況。