【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
查找跨度表得出合适的椽条尺寸:假设条件:屋面活荷载 1kPa,椽条不支撑吊顶,挠度限值:跨度/150 (1)轻型屋面,跨度4.5m,间距300mm,IIc/IIIc 级SPF:( )(2)轻型屋面,跨度4.5m,间距400mm,Ic 级花旗松:( )(3)重型屋面,跨度2.44m,间距300mm,IVc/Vc 级其他北美树种:( )(4)重型屋面,跨度4.23m,间距400mm,Ic 级SPF:( )(5)轻型屋面,跨度5.2m,间距600mm,IIc/IIIc 级SPF:( )
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参考答案:
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