. The trackman's helper, a handbook for track foremen, supervisors and engineers . 8, Sy^ and 9 inches Width 5 and 6 inches Thickness % inch and up This type of plate can be furnished without the de-pressions in the top. The Lackawanna Hook Shoulder tj^pe of plate asillustrated measures III/2 x 7 x % ; weight seven-teen (17) pounds, for one hundred and one (101)pound rail with 5% width base, flat rail base line of plate is ex-central to rail. Forty-eightper cent. (48%) of plate bearing on inside and fifty-two per cent. (52%) on outer side of central line ofrail. Holes punched for
. The trackman's helper, a handbook for track foremen, supervisors and engineers . 8, Sy^ and 9 inches Width 5 and 6 inches Thickness % inch and up This type of plate can be furnished without the de-pressions in the top. The Lackawanna Hook Shoulder tj^pe of plate asillustrated measures III/2 x 7 x % ; weight seven-teen (17) pounds, for one hundred and one (101)pound rail with 5% width base, flat rail base line of plate is ex-central to rail. Forty-eightper cent. (48%) of plate bearing on inside and fifty-two per cent. (52%) on outer side of central line ofrail. Holes punched for four (4) holding (standardscrew) spikes, and two (2) guard (common) spikes. Fig. 77 shows a type of plate with screw spike. Another type is the ^Erac combined rail anchor 318 THE TRACKMANS HELPER and tie plate {Fig. 78). This combination consistsof:— 1st. A rolled steel double shouldered tie-plate. round corrugated steel pin working on an angularplane. (A) Section of rail. (B) Tie-plate. (C)Shoulder ^\dth obtuse angle on inner surface. (D) Around, corrugated steel Fig. 78. The *Erac Combined Rail Anchor and Tie Plate The pin moves in angle in the direction of the creep-ing, expansion or contraction. The greater the tend-ency to creep the more firmly the pin locks. The Lundie plate, of still another type, is shownin Fig. 79. An inspection of test rails in the maintrack of a trunk line road indicated the effect securedby the use of this plate and was described in the Gazette as follows: New 100-lb. A. R. A. type A rails were laid onparallel tracks on a 5-deg., 40-min. curve carrying aheavy freight traffic one year before the inspection re-ferred to. The Lundie tie plates were placed under TIE PLATES 319 the rails in one track while ordinary flat plates wereused in the other track. The superelevation of thehigh rail was standard. The usual wear of the railhead was found on the track laid with flat plates asindicated in the accompanying drawing reproducedfrom m
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Keywords: ., bookcentury1900, bookdecade1910, bookidtrackmanshel, bookyear1917
