旋轉樓梯通常稱為螺旋形或螺旋式樓梯，通常是圍繞一根單柱布置。由于其流線造型美觀、典雅，節省空間而受歡迎。現在，在各種建筑設計(ji)中旋轉樓(lou)梯(ti)使用的越來(lai)越多，主要是(shi)為了(le)適(shi)應建筑空(kong)間和美觀的要求。旋轉樓(lou)梯(ti)主要分為兩種：

一、懸臂式旋轉樓(lou)梯：這種樓(lou)梯比較簡單，主要(yao)(yao)是利用(yong)(yong)中間鋼(gang)柱(zhu)(zhu)支撐(cheng)，樓(lou)梯踏(ta)步梁焊(han)接在鋼(gang)柱(zhu)(zhu)上。鋼(gang)柱(zhu)(zhu)一般采(cai)用(yong)(yong)鋼(gang)管，要(yao)(yao)求(qiu)柱(zhu)(zhu)底剛接。在計算時(shi)要(yao)(yao)求(qiu)考慮(lv)均布荷載施加在踏(ta)步梁上時(shi)，對結構的(de)(de)(de)(de)作(zuo)用(yong)(yong)，同(tong)時(shi)考慮(lv)不均勻荷載施加時(shi)對鋼(gang)柱(zhu)(zhu)產生的(de)(de)(de)(de)彎矩對柱(zhu)(zhu)底的(de)(de)(de)(de)作(zuo)用(yong)(yong)能否滿足。鋼(gang)柱(zhu)(zhu)的(de)(de)(de)(de)軸心(xin)壓(ya)力承載能力是很強(qiang)的(de)(de)(de)(de)，因此設計的(de)(de)(de)(de)關(guan)鍵在于(yu)樓(lou)梯踏(ta) 步梁的(de)(de)(de)(de)支撐(cheng)力核(he)算，和鋼(gang)柱(zhu)(zhu)在偏心(xin)荷載作(zuo)用(yong)(yong)下的(de)(de)(de)(de)承載能力。

二(er)、板(ban)(ban)(ban)(ban)(ban)式旋轉樓(lou)(lou)梯(ti)(ti)(ti)：這種(zhong)旋轉樓(lou)(lou)梯(ti)(ti)(ti)沒有中(zhong)間(jian)支(zhi)(zhi)撐，支(zhi)(zhi)撐點(dian)在(zai)樓(lou)(lou)梯(ti)(ti)(ti)的(de)底部和上部，主要(yao)靠樓(lou)(lou)梯(ti)(ti)(ti)本身旋轉成型(xing)(xing)。這種(zhong)樓(lou)(lou)梯(ti)(ti)(ti)的(de)樓(lou)(lou)梯(ti)(ti)(ti)梁一般(ban)采用焊(han)接(jie)矩(ju)形管，踏(ta)步(bu)(bu)板(ban)(ban)(ban)(ban)(ban)、立(li)板(ban)(ban)(ban)(ban)(ban)均為(wei)10mm鋼板(ban)(ban)(ban)(ban)(ban)，要(yao)求滿焊(han)。樓(lou)(lou)梯(ti)(ti)(ti)梁的(de)加工很(hen)困難(nan)，因(yin)為(wei)實際上是空間(jian)曲線(xian)，一般(ban)是先加工兩個立(li)板(ban)(ban)(ban)(ban)(ban)，立(li)板(ban)(ban)(ban)(ban)(ban)按(an)實際放樣要(yao)求進行彎曲成型(xing)(xing)，在(zai)現場(chang)安(an)裝內側(ce)板(ban)(ban)(ban)(ban)(ban)后，在(zai)現場(chang)組對(dui)另外三塊板(ban)(ban)(ban)(ban)(ban)，并(bing)焊(han)接(jie)牢(lao)固(gu)。踏(ta)步(bu)(bu)板(ban)(ban)(ban)(ban)(ban)和立(li)板(ban)(ban)(ban)(ban)(ban)現場(chang)安(an)裝和焊(han)接(jie)。板(ban)(ban)(ban)(ban)(ban)式旋轉樓(lou)(lou)梯(ti)(ti)(ti)是整(zheng)體(ti)受(shou)力模(mo)型(xing)(xing)，踏(ta)步(bu)(bu)立(li)板(ban)(ban)(ban)(ban)(ban)和面(mian)板(ban)(ban)(ban)(ban)(ban)與樓(lou)(lou)梯(ti)(ti)(ti)梁剛接(jie)，實際計算(suan)時(shi)，可在(zai)模(mo)型(xing)(xing)中(zhong)按(an)折(zhe)算(suan)成的(de)截(jie)面(mian)參數考慮受(shou)力和傳遞(di)荷載。這種(zhong)樓(lou)(lou)梯(ti)(ti)(ti)在(zai)滿布荷載時(shi)為(wei)最不利情況，按(an)此計算(suan)滿足即可，同時(shi)注意對(dui)節點(dian)的(de) 驗算(suan)。