Girder No. 1.
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Experiment No. 1 . Experiment No. 2. Experiment No. 3. Experiment No. 4.
inches. inches. inches. inches.
Depth. 2·015 2·02 2·073 2·040
Thickness .. ·975 ·98 1·030 ·990
Area of section .................. 1·965 1·98 2·135 2·020
Weight applied, lbs. Deflection. Deflection. Deflection. Deflection.
40 ·015 ·013 ·014 ·014
376 ·145 ·115
600 ·203
712 ·280 ·233 ·264 ·244
936 ·330
1160 ·490 ·420 ·397 ·414
1608 ·725 ·625 ·579 ·614
1664 Broke ·755 ·655
1720 ·680 ·629 ·659
1832 ...... ·737 ·679 ·734
1888 ...... Broke ·699 ·764
1916 -.. A... Broke
1944 ...... ·734
2000 ... ... ·762
2028 ..... ·774
2056 ... ... .' .. ... ·789
2084 ... ... ... ... Broke
Breaking weight, lbs. ......... 1664 1888 2084 1916
Deflection with nine-tenths of breaking weight, inches ·643 ·667 ·699 ·670
Girder No. 2.
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Experiment No. 1. Experiment No. 2. Experiment No. 3. Experiment No. 4.
inches. inches. inches. inches.
Total depth. 2·54 2·53 2·49 2·50
Depth between upper and lower ribs. ·56 ·55 ·51 ·55
Area of top rib. 1·00 1·00 ·97 ·98
Area of bottom rib 1·01 1·00 ·99 ·97
Weight applied, lbs. Deflection. Deflection. Deflection. Deflection.
40 ·009 ·007 ·007 ·007
712 ·132 ·134 ·137
804 ·199
1292 ·304
1516 ·302 ·319 ·312
1740 ·414
1852 ·372
1964 ·489 ·397 ·426 ·433
2076 ·427
2188 Broke ·445 ·479 ·487
2300 .... ·479 ·526 ·532
2412 ...... ·512 Broke ·550
2524 ...... ·542 ...... Broke
2636 ...... ·575
2748 ...... Broke
Breaking weight, lbs. ......... 2188 2748 2412 2524
Deflection with nine-tenths of breaking weight, inches ·489 ·532 ·482 ·516
