File:Railway track and track work (1908) (14574694610).jpg

Identifier: railwaytracktrac01trat (find matches)
Title: Railway track and track work
Year: 1908 (1900s)
Authors: Tratman, E. E. R. (Edward Ernest Russell), b. 1863
Subjects: Railroad tracks Railroads
Publisher: New York, The Engineering News Publishing Co. (etc., etc.)
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Text Appearing Before Image:
this cutting by the use of metal tie-plates, which are also frequentlyused to replace rail braces on turnout curves. The timbers should be spacedabout 20 to 24 ins. apart, c. to c, not less than 8 ins. apart in the clear, but thespacing must be varied to fit the rail joints and to get a tie under the frog point,or as nearly under as a yoked frog will permit. The required length of the timbers is ascertained by taking the distance (ininches) between the tie at the heel of the switch and the tie under the frog point,dividing this by the number of ties to be placed between them, and adding theamount thus obtained to the length of each tie, starting from the heel of theswitch. This arrangement, with every timber cut to length, is shown in the ErieRy. turnout (Fig. 66). Very frequently, however, instead of using a differentlength for each timber, the timbers are made in groups of the same length to thenearest 6 or 12 ins. This is done by the Southern Pacific Ry., as shown by the 132 TRACK.
Text Appearing After Image:
Vf~a&^Qttiflaxi o3 o ; o 3 -;;.;-:///j6r^ ; E iVrtv/rrfsr** SWITCHES AND FROGS. 133 dotted lines in Fig. 67, but on that road after the ties are laid their ends are cutoff parallel with the sidetrack rail, as indicated, which seems to be entirelyunnecessary, involving useless labor and time. This turnout is for a No. 9spring-rail frog, and tracks 15 ft. c. to c. The last long timber should not exceed 16 ft. in length, though for crossoverson double track the middle timbers are often made long enough to take bothtracks. A practice sometimes followed is to have a plank about 1X10 ins.,16 to 18 ft. long, with the lengths of the several timbers scribed and markedupon it. This is used as a gage in sawing the timbers to length before laying,but it is better to have them sawed to specified lengths at the mill, if this canbe done. To ascertain the length of timbers for a three-throw switch, subtracthalf the length of the standard tie from the length of the switch timber for asingle switch

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