Layout tool for locating holes on structural steel
作者： Abraham E. Shlager
DOI:
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摘要: A layout tool is movable along a structural beam or girder and includes measuring scales adapted to facilitate accurate location of holes be formed at selected places on the beam. The for manual use construction site.
lens.org 参考文章(3)
Edgar W Cunningham, Universal templet for structural-steel work ,(1920)
Petrenko Wassyl, Vorrichtung zum Anreissen und Ankoernen von Stahlbauteilen od. dgl. ,(1964)
Wayland Hernlund, Gage for determining points on structural i-beams. ,(1911)