按結構形(xing)式和受力(li)特點樓(lou)梯形(xing)式可(ke)分為(wei)板式、梁式、懸挑(剪刀)式和螺旋式，前兩(liang)種屬于平面(mian)受力(li)體(ti)系(xi)，后兩(liang)種則(ze)為(wei)空(kong)間受力(li)體(ti)系(xi)。

板(ban)(ban)(ban)式(shi)樓(lou)(lou)梯(ti)是由(you)梯(ti)段(duan)(duan)板(ban)(ban)(ban)、平臺板(ban)(ban)(ban)和平臺梁組成。梯(ti)段(duan)(duan)板(ban)(ban)(ban)是一塊帶踏步的(de)斜板(ban)(ban)(ban)，斜板(ban)(ban)(ban)支承于上(shang)、下平臺梁上(shang)，底層下端支承在地壟墻上(shang)。板(ban)(ban)(ban)式(shi)樓(lou)(lou)梯(ti)的(de)優點是梯(ti)段(duan)(duan)板(ban)(ban)(ban)下表面平整，支模簡(jian)單;其缺點是梯(ti)段(duan)(duan)板(ban)(ban)(ban)跨(kua)度較大時(shi)，斜板(ban)(ban)(ban)厚度較大，結構材料用(yong)量較多。因此板(ban)(ban)(ban)式(shi)樓(lou)(lou)梯(ti)適用(yong)于可變荷(he)載較小、梯(ti)段(duan)(duan)板(ban)(ban)(ban)跨(kua)度一般不大于3m的(de)情況。