. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . McKee Tie Plate. Loads as Applied, Te st No. 1, Tes t No. 2, Pounds. Deflec ion Inches. DeEect on Inches. 250 000 000 4,000 022 022 8,000 029 030 12,000 035 038 16,000 042 056 20,000 054 070 24,000 066 081 28,000 081 100 32,000 101 129 36,000 122 165 40,000 154 210 44,000 188 248 48,000 221 285 SUPPORTS OF THE RAIL 123 in unison with the rail. It was not long before the soft fibers of the loblolly-pine suffered under this treatment, and in the course of time so g
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . McKee Tie Plate. Loads as Applied, Te st No. 1, Tes t No. 2, Pounds. Deflec ion Inches. DeEect on Inches. 250 000 000 4,000 022 022 8,000 029 030 12,000 035 038 16,000 042 056 20,000 054 070 24,000 066 081 28,000 081 100 32,000 101 129 36,000 122 165 40,000 154 210 44,000 188 248 48,000 221 285 SUPPORTS OF THE RAIL 123 in unison with the rail. It was not long before the soft fibers of the loblolly-pine suffered under this treatment, and in the course of time so great did theabrasion and crushing of the fibers by the plate become that a considerable holewas made under the plate, in which water gathered. The plate gradually sank. Fig. 86. — Wear of Tie under Tie upper illustration shows a Loblolly Pine Tie treated with Zinc Chloride, after four years service in lower illustration shows a longitudinal section through the spike hole of a Western Yellow PineTie after several years service in Texas.(Bureau of Forestry, Bulletin No. 50.) down into this hole, as shown in the illustration. When the tie was removedit had disappeared in the wood, and the base of the rail was resting on the outeredges of the tie beyond the plate. This tie had been treated with zinc chloride. The water which gatheredunder the tie plate leached out the salt, and as a result decay started on bothsides of the plate, as the illustration shows. The tie had to be removed, al-though the rest of it was perfectly sound (Figs. 87 and 88). STEEL RAILS % /$ v5,-*-,~N . i4 ft. ■2 ^^^hUhhP j— Fig. 87. — Section of Tie under Rail Bearing showing Wear and Decay,
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Keywords: ., bookcentury1900, bookdecade1910, bookidsteelrailsth, bookyear1913
