Revision of the Niagara Railway Arch Bridge . stantly passing overa bridge, nor for impact readings. Neither is it as easy to use aseither of the other types. The Berry gauge was highly satisfactoryfor the dead load readings and for the static live load, but for impactwork the vibration of the needle of the Ames dial made the readingstoo large, which, of course, was on the side of safety. The Fuller-Westinstrument was, in the writers opinion, the best for all classes of work,and the only one that was really accurate for impact, as there was nodisconcerting vibration of the needle of the Last W
Revision of the Niagara Railway Arch Bridge . stantly passing overa bridge, nor for impact readings. Neither is it as easy to use aseither of the other types. The Berry gauge was highly satisfactoryfor the dead load readings and for the static live load, but for impactwork the vibration of the needle of the Ames dial made the readingstoo large, which, of course, was on the side of safety. The Fuller-Westinstrument was, in the writers opinion, the best for all classes of work,and the only one that was really accurate for impact, as there was nodisconcerting vibration of the needle of the Last Word dial. Forthe work done it was more satisfactory than a deflectometer. The great care necessary in drilling the holes for the gauge pointsand in holding the strain gauge perpendicular to the member wasa vital point, and necessitated a large number of check new scheme devised by Professor Fullers mechanician, Mr. PLATE XXXIX. TRANS. AM. 80C. CIV. ENGRS. VOL. LXXXIII, No. 1460. FOWLER ON REVISION OF NIAGARA RAILWAY ARCH GROUP Virginian Ry. 2-8-8-2 and 210000-lb. L. S. & M. S. Mallet 0-8-8-0 and 210 000-lb. Virginian Ry. 2-10-10-2 and 210 000-lb. Engine 2-10-2 and 210 000-lb. cars. 150 Span, in Feet. \ 23A-The Virginian Ry. 2-10-10-2 and 6 000-lb. per lin. ft. uniform Ry. NIS 2-10-2 and 6 000-lb. per lin. ft. uniform load. GROUP IT (Continued).25-U. S. Standard 2-8-8-2-B and 210 000-J,b. cars26-Pennsylvania 2-10-2 and 210 000-lb. cars Engines 21, 22, 23, 23A, and 25, single-headed; Engines 24 and 26, 26A double-headed. 130 125 120 . 1158 a no - d\ SHEARS, IN PERCENTAGE OF E-60. | 130125120115110 ° 105 = ^=2er^= == 105100 9590858075 75 150in, in Feet. DISCUSSION ON REVISION OF NIAGARA RAILWAY ARCH BRIDGE 2023 West, is one of the greatest improvements yet made for strain gauge Mr,work. This consists in drilling the small holes and then setting into ow er
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