Iron Roofs: Examples of Design, Description, Illustrated With Working Drawings (Classic Reprint) - Hardcover

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Excerpt from Iron Roofs: Examples of Design, Description, Illustrated With Working Drawings

Bridge was erected over the river Thames. In Westminster Bridge, a curve parallel to an ellipse was adopted as giving better headway than a true ellipse. An elliptical curve, however, is not the most economical construction for ironwork. The principal of the trussing of the roof over the House of Lords (figure 13) was a great advance upon the old systems that had been adopted, but would probably be much modified if constructed in the present day.

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