按結構形式和受力特點樓梯形式可分為(wei)板式、梁式、懸挑(剪刀)式和螺旋式，前兩種屬于平面受力體(ti)系，后兩種則為(wei)空間受力體(ti)系。

板(ban)(ban)(ban)(ban)式樓梯(ti)是(shi)由梯(ti)段(duan)板(ban)(ban)(ban)(ban)、平臺板(ban)(ban)(ban)(ban)和(he)平臺梁(liang)組成。梯(ti)段(duan)板(ban)(ban)(ban)(ban)是(shi)一塊帶踏步的斜(xie)板(ban)(ban)(ban)(ban)，斜(xie)板(ban)(ban)(ban)(ban)支(zhi)承(cheng)于上(shang)(shang)、下平臺梁(liang)上(shang)(shang)，底層下端(duan)支(zhi)承(cheng)在地(di)壟墻(qiang)上(shang)(shang)。板(ban)(ban)(ban)(ban)式樓梯(ti)的優點(dian)是(shi)梯(ti)段(duan)板(ban)(ban)(ban)(ban)下表面平整，支(zhi)模簡(jian)單;其缺(que)點(dian)是(shi)梯(ti)段(duan)板(ban)(ban)(ban)(ban)跨度較大(da)時，斜(xie)板(ban)(ban)(ban)(ban)厚度較大(da)，結構材(cai)料(liao)用量(liang)較多(duo)。因此(ci)板(ban)(ban)(ban)(ban)式樓梯(ti)適(shi)用于可變荷載較小、梯(ti)段(duan)板(ban)(ban)(ban)(ban)跨度一般不大(da)于3m的情況。