净跨径对于梁式桥指设计洪水位线上相邻两桥墩（或桥台）的水平净距离；对于拱桥指两起拱线间的水平距离。
奇怪的是，作为此古桥最基本的技术数据的净跨径现尚无定论，众说纷纭。
It is quite strange that no final conclusion has yet been reached on the clear span of this ancient bridge as the most basic datum. Public opinions are divergent.
该文建议挖开掩盖赵州桥拱脚的石块和泥土，找到两拱脚，精确测定净跨径。
The article proposes to clear away the earth and stones covering the two springs of arch of the bridge and then survey and determine with accuracy its clear span.
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