Tests of large bridge columns. . .0104 + .0143 4 084 800 46 000 +.0002 .0000 +.0002 .0000 +.0113 + .0150 4 173 600 47 000 + .0003 .0000 +.0002 + .0001 + .0118 +.0156 4 262 400 48 000 + .0004 + .0001 —.0005 + .0004 + .0002 —.0008 + .0124 + .0160 4 351 200 49 000 + .0004 + .0002 + .0002 + .0133 + .0170 4 440 000 50 000 + .0006 + .0003 +.0001 .0000 +.0139 + .0176 4 528 800 51 000 + .0008 + .0005 .0000 .0000 —.0009 +.0145 + .0186 4 617 600 52 000 + .0008 + .0005 .0000 .0000 +.0151 + .0194 4 706 400 53 000 + .0007 + .0005
Tests of large bridge columns. . .0104 + .0143 4 084 800 46 000 +.0002 .0000 +.0002 .0000 +.0113 + .0150 4 173 600 47 000 + .0003 .0000 +.0002 + .0001 + .0118 +.0156 4 262 400 48 000 + .0004 + .0001 —.0005 + .0004 + .0002 —.0008 + .0124 + .0160 4 351 200 49 000 + .0004 + .0002 + .0002 + .0133 + .0170 4 440 000 50 000 + .0006 + .0003 +.0001 .0000 +.0139 + .0176 4 528 800 51 000 + .0008 + .0005 .0000 .0000 —.0009 +.0145 + .0186 4 617 600 52 000 + .0008 + .0005 .0000 .0000 +.0151 + .0194 4 706 400 53 000 + .0007 + .0005 .0000 .0000 +.0161 + .0203 4 795 200 54 000 + .0007 + .0006 .0000 .0000 — .0007 + .0168 + .0212 4 884 000 55 000 + .0008 +.0008 .0000 — .0008 +.0177 + .0221 4 972 800 56 000 57 000 + .0007+ .0008 +.0008+.0010 + .0206+ .0203 + .0226+.0230 5 061 600 .0000 5 150 400 58 000 + .0004 + .0010 +.0001 + .0227 + .0233 5 239 000 59 000 Tests of Large Bridge Columns 25. North Face Soaih Face Fa*/ Face Fig. 1.—Column U2US (nickel steel). Key to stations on Table 3 26 Technologic Papers of the Bureau of Standards TABLE 4.—Log of Test Column U8U9 of Nickel Steel {Cumulative (±) Elongations at Stations Below. Tested Jan. 28,1913. Time of Test, a. m. to 4 p. Load in Load,pounds pounds persquare 47 48 49 50 51 52 age,47 to 52 53 54 55 56 inch 110 300 1 000 si «Tc 551 500 5 000 —.0030 —.0025 —.0025 — .0026 —.0026—.0014 + .0004 +.0006 1 103 000 10 000 —.0062 —.0063 — .0061 —.0053 —. + .0008 o ofl 3 +.0008 1 654 500 15 0C0 —.0091 —.0091 —.0089 —. + .0013 +.0015 2 206 000 20 000 —.0132 —.0125 —.0123 —.0125 + .0017 +.0016 2 757 500 25 000 —.0160 +.0022 +.0022 3 3
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