按(an)結構形式(shi)和受力特點樓(lou)梯形式(shi)可(ke)分為板式(shi)、梁式(shi)、懸挑(tiao)(剪刀)式(shi)和螺旋(xuan)式(shi)，前兩(liang)(liang)種(zhong)(zhong)屬于平面受力體系，后兩(liang)(liang)種(zhong)(zhong)則為空間受力體系。

板(ban)(ban)(ban)式樓梯(ti)是由梯(ti)段(duan)(duan)板(ban)(ban)(ban)、平臺(tai)板(ban)(ban)(ban)和平臺(tai)梁(liang)組成(cheng)。梯(ti)段(duan)(duan)板(ban)(ban)(ban)是一塊(kuai)帶踏(ta)步的(de)斜板(ban)(ban)(ban)，斜板(ban)(ban)(ban)支(zhi)承(cheng)于(yu)(yu)上(shang)、下(xia)平臺(tai)梁(liang)上(shang)，底層下(xia)端支(zhi)承(cheng)在地壟墻上(shang)。板(ban)(ban)(ban)式樓梯(ti)的(de)優點是梯(ti)段(duan)(duan)板(ban)(ban)(ban)下(xia)表(biao)面平整，支(zhi)模簡單;其缺點是梯(ti)段(duan)(duan)板(ban)(ban)(ban)跨(kua)度較(jiao)大時(shi)，斜板(ban)(ban)(ban)厚度較(jiao)大，結構(gou)材(cai)料用(yong)量較(jiao)多。因(yin)此板(ban)(ban)(ban)式樓梯(ti)適用(yong)于(yu)(yu)可變荷載較(jiao)小、梯(ti)段(duan)(duan)板(ban)(ban)(ban)跨(kua)度一般(ban)不大于(yu)(yu)3m的(de)情(qing)況。