For the relatively smaller loads, the economical height-to-span ratio scopes of space steel trusses and space prestressed steel trusses can be found.

对于相对较小的荷载，可以找到立体钢桁架及立体预应力钢桁架的经济高跨比范围。

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By study of large amount of computational results, the optimal heights of space steel trusses and space prestressed steel trusses of several spans are got.

通过对大量计算结果的研究，得出了几种跨度下立体钢桁架及立体预应力钢桁架的最优高度。

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