. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . city) 50,000 lbs. plus 10 per cent overload 5,000 lbs. Total 117,320 lbs. Equipped with four- motors, one motor to each axle. Fig. 53. — Typical Dynamic Load Diagrams for Electric Railway = Dynamic load per wheel, pounds(S = Static load per wheel, poundsD = S + 10,000 where S is more than 15,000D = S where S is less than 15,000 CHAPTER IIIsupports of the rail 13. The Tie The most common material used for the tie is wood. Some have sug-gested (and this
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . city) 50,000 lbs. plus 10 per cent overload 5,000 lbs. Total 117,320 lbs. Equipped with four- motors, one motor to each axle. Fig. 53. — Typical Dynamic Load Diagrams for Electric Railway = Dynamic load per wheel, pounds(S = Static load per wheel, poundsD = S + 10,000 where S is more than 15,000D = S where S is less than 15,000 CHAPTER IIIsupports of the rail 13. The Tie The most common material used for the tie is wood. Some have sug-gested (and this suggestion is made with increasing frequency) that ties should be made out of materials otherthan wood. Granite ties wereamong the earliest substitutesoffered; they were used for sometime in Dublin, Ireland, andon the old Boston and LowellRailroad in Massachusetts. Forsome fifty years various formsof metal ties have been sug-gested, and a large number ofsteel ties have been tried invarious countries. In recentyears concrete ties have beenmade. The following examplespresent in a general way whathas been attempted as a substi-. FiG. 54. — Carnegie Steel Tie. tute for the wooden tie. The list is far from complete, and must necessarilyremain so, as new forms of metal and concrete ties are constantly being subject has been very fully reported upon by the comniittee on ties of theAmerican Railway Engineering Association.* Steel ties have been used quite extensively on the Union Railroad and on theBessemer and Lake Erie The total number of steel ties on these tworoads is over one million or enough to lay 300 miles of track. There are a largenumber of steel ties of the Carnegie type (Fig. 54) in use throughout the country. * See U(>i)<)it of Committee on Ties, Proceedings Am. lly. Eng. Assn., 1909, 1910, 1911, and1912, pp. 343-370. 90 SUPPORTS OF THE HAIL 91 Fig. 55 shows the insulated tie in use on the Bessemer and liake Erie Rail-road. The insulated
Size: 1568px × 1594px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidsteelrailsth, bookyear1913
