Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 116
of boiler and the pressure to be carried. For-merly when comparatively low pressures were used (60 to75 pounds per square inch) the diagonal crow foot bracewas considered amply sufficient for staying the flat heads ofboilers of the cylindrical tubular type, both above and be-low the tubes, but in… … Fig. 38 pull at right angles to the plate, thus having a great advan-tage over the diagonal stay in that the pull on the diagonalstay per square inch of section is more than 5 per cent inexcess of what a through stay would have to resist underthe same conditions of pressure. The weakest portion of…
