按結構形式(shi)(shi)(shi)和受力(li)特點(dian)樓梯形式(shi)(shi)(shi)可分為(wei)板式(shi)(shi)(shi)、梁式(shi)(shi)(shi)、懸挑(剪刀(dao))式(shi)(shi)(shi)和螺(luo)旋(xuan)式(shi)(shi)(shi)，前(qian)兩種屬(shu)于平(ping)面受力(li)體系，后兩種則(ze)為(wei)空間受力(li)體系。

板(ban)(ban)(ban)式樓梯(ti)是(shi)由梯(ti)段(duan)板(ban)(ban)(ban)、平(ping)(ping)臺(tai)板(ban)(ban)(ban)和平(ping)(ping)臺(tai)梁(liang)(liang)組成。梯(ti)段(duan)板(ban)(ban)(ban)是(shi)一(yi)塊帶踏(ta)步(bu)的斜(xie)板(ban)(ban)(ban)，斜(xie)板(ban)(ban)(ban)支承(cheng)于(yu)上、下平(ping)(ping)臺(tai)梁(liang)(liang)上，底層(ceng)下端(duan)支承(cheng)在地壟墻(qiang)上。板(ban)(ban)(ban)式樓梯(ti)的優點是(shi)梯(ti)段(duan)板(ban)(ban)(ban)下表面(mian)平(ping)(ping)整，支模(mo)簡單(dan);其缺點是(shi)梯(ti)段(duan)板(ban)(ban)(ban)跨度較大時，斜(xie)板(ban)(ban)(ban)厚度較大，結構材料用量較多。因(yin)此板(ban)(ban)(ban)式樓梯(ti)適用于(yu)可變荷載較小、梯(ti)段(duan)板(ban)(ban)(ban)跨度一(yi)般不大于(yu)3m的情況。