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William Phillips Thompson
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11,500. Thompson, W. P., [Hoffmann & Kalweit]. May 16. Girders; floors; ceilings.-A girder of uniform strength is built up of two bent sheet-iron or steel plates a, connected by distance-pieces b and formed with shoulders f having horizontal upper faces for supporting flat floors g, and inclined lower faces, which, when the girders are inverted, form abutments for arched floors. Wooden or like bars c, e, to which the flooring and ceiling may be nailed, are secured to the girders by ties d. The thickness of the plates a varies along the length in proportion to the stresses, the external dimensions being constant.
GB190711500D1907-05-161907-05-16Improvements in Girders for Building Purposes.
ExpiredGB190711500A
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