按(an)結構形式(shi)(shi)和受(shou)力特點樓梯形式(shi)(shi)可分為板式(shi)(shi)、梁(liang)式(shi)(shi)、懸挑(剪刀)式(shi)(shi)和螺(luo)旋式(shi)(shi)，前兩種屬于平面(mian)受(shou)力體系，后(hou)兩種則為空間(jian)受(shou)力體系。

板(ban)(ban)(ban)式(shi)(shi)樓梯(ti)是由(you)梯(ti)段(duan)(duan)(duan)(duan)板(ban)(ban)(ban)、平臺(tai)板(ban)(ban)(ban)和平臺(tai)梁(liang)組成。梯(ti)段(duan)(duan)(duan)(duan)板(ban)(ban)(ban)是一(yi)塊帶踏步的斜板(ban)(ban)(ban)，斜板(ban)(ban)(ban)支承于(yu)上(shang)、下平臺(tai)梁(liang)上(shang)，底層(ceng)下端支承在地(di)壟墻上(shang)。板(ban)(ban)(ban)式(shi)(shi)樓梯(ti)的優點(dian)是梯(ti)段(duan)(duan)(duan)(duan)板(ban)(ban)(ban)下表面平整，支模(mo)簡單;其缺點(dian)是梯(ti)段(duan)(duan)(duan)(duan)板(ban)(ban)(ban)跨度(du)較(jiao)(jiao)大時，斜板(ban)(ban)(ban)厚度(du)較(jiao)(jiao)大，結(jie)構材料用(yong)量較(jiao)(jiao)多。因(yin)此板(ban)(ban)(ban)式(shi)(shi)樓梯(ti)適用(yong)于(yu)可變(bian)荷(he)載較(jiao)(jiao)小(xiao)、梯(ti)段(duan)(duan)(duan)(duan)板(ban)(ban)(ban)跨度(du)一(yi)般不大于(yu)3m的情況(kuang)。