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網架公司淺談網架的撓度要求及屋面排水坡度

發布日期:2019-12-30 17:04:01  信息來源:本站原創

網架公司淺談網架的撓度要求及屋面排水坡度 
  網架結構的容許撓度不應超過下列數值:用作屋蓋-l2/250;用作樓面-l2/300。l2為網架的短向跨度。

  網架屋面排水坡度一般為1%~4%,可采用下列辦法找坡: 
  (a)在上弦節點上加設不同高度的小立柱,當小立柱較高時,須注意小立柱自身的穩定性;
  (b)對整個網架起拱;
  (c)采用變高度網架,增大網架跨中高度,使上弦桿形成坡度,下弦桿仍平行于地面,類似梯形桁架。 
  有起拱要求的網架(為消除網架在使用階段的撓度),其拱度可取不大于短向跨度的1/300。
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