按(an)結構形式(shi)(shi)和受力(li)特點樓梯形式(shi)(shi)可(ke)分(fen)為(wei)(wei)板式(shi)(shi)、梁(liang)式(shi)(shi)、懸挑(剪刀)式(shi)(shi)和螺(luo)旋式(shi)(shi)，前兩種(zhong)屬于平(ping)面受力(li)體(ti)系(xi)，后兩種(zhong)則(ze)為(wei)(wei)空間受力(li)體(ti)系(xi)。

板(ban)(ban)(ban)式樓(lou)梯(ti)是由(you)梯(ti)段(duan)板(ban)(ban)(ban)、平臺(tai)板(ban)(ban)(ban)和平臺(tai)梁組成。梯(ti)段(duan)板(ban)(ban)(ban)是一(yi)塊帶踏步的斜板(ban)(ban)(ban)，斜板(ban)(ban)(ban)支(zhi)承(cheng)于(yu)(yu)上、下平臺(tai)梁上，底層(ceng)下端支(zhi)承(cheng)在地壟墻(qiang)上。板(ban)(ban)(ban)式樓(lou)梯(ti)的優點(dian)是梯(ti)段(duan)板(ban)(ban)(ban)下表面平整(zheng)，支(zhi)模簡單;其缺點(dian)是梯(ti)段(duan)板(ban)(ban)(ban)跨度(du)較(jiao)大(da)時，斜板(ban)(ban)(ban)厚度(du)較(jiao)大(da)，結構材料(liao)用(yong)(yong)量較(jiao)多。因此板(ban)(ban)(ban)式樓(lou)梯(ti)適(shi)用(yong)(yong)于(yu)(yu)可變荷載較(jiao)小、梯(ti)段(duan)板(ban)(ban)(ban)跨度(du)一(yi)般(ban)不大(da)于(yu)(yu)3m的情況。