Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 574
Fig. 1324. … Fig. 1325 by a tie-bolt (Fig. 1326), or cast-iron lintels, box girders, j^- or rolled I-beams. But it is to be observed that, when the cement is set, there is little or no thrustfrom the arch. The whole dead work^ or masonry withoutan opening, forms a monolithic beam, and, if there is depthenough…
Mechanical drawing
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