. Railway maintenance engineering, with notes on construction . 38. Sections, Foreign.—In Europe a T-rail section is Vignole rail, used extensively abroad, was invented in Englandin 1836 by Mr. Chas. Vignoles. In England, however, the ideaseems to prevail that a T-rail track is undesirable and the bullhead rail is generally used on the EngUsh railways. Fig. 635shows the 100-lb. section of the British Standard bull head rail. 39. Weight.—The 90-lb. and 100-lb. sections are now gen-erally adopted as standard on American railroads. Sections of RAILS 109 heavier weight have not met with g
. Railway maintenance engineering, with notes on construction . 38. Sections, Foreign.—In Europe a T-rail section is Vignole rail, used extensively abroad, was invented in Englandin 1836 by Mr. Chas. Vignoles. In England, however, the ideaseems to prevail that a T-rail track is undesirable and the bullhead rail is generally used on the EngUsh railways. Fig. 635shows the 100-lb. section of the British Standard bull head rail. 39. Weight.—The 90-lb. and 100-lb. sections are now gen-erally adopted as standard on American railroads. Sections of RAILS 109 heavier weight have not met with general favor, although thereare a few exceptions, notably the 105-lb. rail standard onthe New York Central, illustrated in Fig. 62, and the in use on the Central Railroad of New Jersey. One thousandtons of this latter rail were ordered in 1910 for use on sharp orders were placed in the years 1912, 1913 and1914, bringing the total tonnage up to 6600 tons. This railhas very high carbon and one of the reasons for the road try-. Head Web Flange 3Z5^ Fig. 62. —Dudley Rail Section, 105 Lbs. per Yd. ing the heavy section was to enable a higher carbon contentto be used than would be considered safe in the 90- or The Pennsylvania have ordered a considerable tonnageof 125-lb. rail and are gradually putting it in the track for test. The heaviest rail contemplated in the and sections was the 100-lb. The new section of the Ameri-can Railway Engineering Association starts at the 100-lb. railand gives designs for sections as heavy as 140 lbs. It does not no RAILWAY MAINTENANCE appear, however, to be the intention that these very heavy railsshould be adopted for present use. The principal reason in going to heavier sections has beento reduce the stresses in the track structure. It should beobserved, however, that good results are not always obtainedas the weight increases, owing to the difficulties met with in themanufa
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