. The trackman's helper, a handbook for track foremen, supervisors and engineers . s given in Fig. 24, B, C, and D of therails used at the present time show the modificationswhich have been made to meet the criticism of themanufacturers in regard to the faults in the designof the heavier A. S. C. E. sections. These thick base sections, adopted after the studiesof 1907, cool with less curvature than the former thinbase types and require less cold straightening. Thestraightening or gagging tends to develop injuriousstrains in the base, and there appears to be a fewernumber of base failures in th
. The trackman's helper, a handbook for track foremen, supervisors and engineers . s given in Fig. 24, B, C, and D of therails used at the present time show the modificationswhich have been made to meet the criticism of themanufacturers in regard to the faults in the designof the heavier A. S. C. E. sections. These thick base sections, adopted after the studiesof 1907, cool with less curvature than the former thinbase types and require less cold straightening. Thestraightening or gagging tends to develop injuriousstrains in the base, and there appears to be a fewernumber of base failures in the new sections as com-pared with the A. S. C. E. design. To still further reduce the failures in the base ofthe rail. Dr. P. H. Dudley has designed a section foruse on the New York Central in which the radius ofthe fillet between the base and the web is increased toone inch. Laying rail under heavy traffic. Mr. W. F. Renchof the P. R. R. recently published the following ex-cellent notes in the Ry. Age Gazette: STANDARD TEE RAIL SECTIONS (by permission of Lefax, Phila.) _^Hd-,^S. H—height E—depth of baae B—base A—head angle Hd-«-head A2—base angle web. S—elope of headD—depth of head N—center of web fishAll dimensions in inches. >%.%,^ %.?^ ^3 %>%i _, ^a^^^^_ s^;:^^ ii?^:^^^^^^;^^^^s^_^ ^_ s^^^?^^::^^^ ^i ;^^#:£:^-^:s^-^.^:^:i?^^^^,v:^?^:^;^^;^^^^^;#^>v^^-=?^;s:i ^^^^2^^^^s^i;r^^^^s^^s^^#:J!^^^;^^^;^^ g^^^^^-^^x. ^:^:^:^.^;^^^^^^^^i^^?^^:^-s^^^^^s^^^^;^^:^^-^^^^ — ^ ^ g^ eg CM CM <M CO CT ev) g] M <^^ gj j cj g? e^ iM i^km im cv>,- -^ §S ggl )00 -- ^3—• = 3r 5 to h-■» ■* — C: O- xH ^oopooccoooo ^•^00000000 00 CDOi^OiOOkOCDOO w? ~ 000000000000wT-oii^omooow^iOk5 0>ooc^^«--o»o§3^|-Soo?Sl;§ooSS^■^ooo6«I--r~o«>oococco■^:!Wcoo^^oc505C 150 ?: (.•■icid-: cic. ;^: ?i t)Ci?< ?4-^^ S. — — o< ci ci ?j o ci c ■. — ?i ?i ?i f j J^ c i ?i ci cl ?4 c 1 ? • < °°52^. 1=2?,, -lo?.!;!^?,. £,, °h
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidtrackmanshelperh01kind
