As the top surface of all truss chords are required to follow the surface geometry of the roof, this has the effect of requiring that top chord boxes will twist along their length.
2
圆屋顶额伟大之处在于它封闭区到外部表面的比例最高，那正是巴基想要的效果。
What's so great about the dome is that it does exactly what Bucky wanted; that is, it has the highest ratio of enclosed area to external surface.
3
圆屋顶额伟大之处在于它封闭区到外部表面的比例最高，那正是巴基想要的效果。
What’s so great about the dome is that it does exactly what Bucky wanted; that is, it has the highest ratio of enclosed area to external surface.
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