Tests of large bridge columns. . Mayari steel Carbon steel Fig. 68.—Riveted sections of steels magnified 6j diameters. The upper edges are adjacentto the rivets and show the combined effects of working from punch and rivet Tests of Large Bridge Columns in by J. E. Howard31 that reaming commonly does not removeall the material that is disturbed by the operation of seemed advisable under the conditions of modern manufactureand workmanship to briefly examine this point again. Twoplates 5 by y% inch of high carbon and Mayari steel, respectively,were tested. A double row of punched, riv
Tests of large bridge columns. . Mayari steel Carbon steel Fig. 68.—Riveted sections of steels magnified 6j diameters. The upper edges are adjacentto the rivets and show the combined effects of working from punch and rivet Tests of Large Bridge Columns in by J. E. Howard31 that reaming commonly does not removeall the material that is disturbed by the operation of seemed advisable under the conditions of modern manufactureand workmanship to briefly examine this point again. Twoplates 5 by y% inch of high carbon and Mayari steel, respectively,were tested. A double row of punched, riveted, and drilled holesof yi inch diameter were placed in series in the plates. Therewere two holes of each set spaced 2 inches apart, the rows being2*%. inches apart. The material was planed in a shaper untilthe midsection of one row of rivets and holes was exposed. Etch-ings were made by the metallurgical division of the Bureau ofStandards on polished sections taken through the rivets andholes and magnified to 67 diameters.
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