The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 402
k of the side length, to be drawn out (oftheir cells) to form the roof of the leading work, length after length ; bywhich means, the same bars travel along the roof to the next junction, unlessby accident any of them get bj-oken, or stick fast in some part of their jour-ney ; whereupon they are… … as to cause snch an effect, it would probably be unwise to draw the bars atall, were it even possible to do so, lest a movement be given to the earth thatwould be liable to [produce results far more costly tlian the value of a fewbars. When the bars are drawn, great care should be taken, as before…
Architecture · Civil engineering · Science
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