207 OF ENGINEERING FORM Ü LÆ.
Rui.es ion the Weight of Rails.
W — Weight of rail in lbs. per yard.
L = Greatest load on one driving wheel in tuns.
W = L X 12.
Sectional area of rail in inches X 10 for iron or 10’4 for
steel == weight of rail in lbs. per yard. Weight of rail in
lbs. per yard X 1'571 = weight of rails for a mile of single
line of railway, in tons.
Memoranda on Rails, &c.
Depth of rails, from 4i to 5 inches for first-class railway.
Thickness of middle web, | inch.
Width of top table, 2| inches.
Radius of ditto, 12 to 40 inches.
' Width offlanch (if a flanged rail), inches.
Thickness of ditto................i inch.
Weight of fish plates, about 20 lbs. per pair.
100 fish bolts weigh about 1 cwt.
Cast-iron intermediate chairs, each 21f lbs.
Ditto joint „ 39 „
Fifteen larch sleepers creosoted, 9 feet 6 inches long,
5 X 10 inches at the small end, weigh 1 ton.
Permanent Way, Indian State Railways, 5 ft. 6 in. Gauge.
Steel Flanch Rails, 62 lbs. per yard.
Quantity required for 1 mile Single Line.
Weight, lbs. Allowance for waste per cent. Actual require- ments tor Bails of lengths. Rails in assorted lengths.
30 ft. 27 ft. 24 ft. No. Tons. Total tons.
30 ft. rails each 620 352 — — 300 83-02
27 „ 24 „ 558 496 — 391-11 440 40 22 9-07 4-87 ^96-96
Fish plates pair 18 5 352 391 440 380 3-05
Fish bolts •875 5 1408 1564 1760 1520 *60 ^13’75
Spikes Bearing ) •7 4-483 10 5 7744 3520 7822 3520 7920 3520 8600 3700 2-70 7-4Ü
plates f Sleepers* 125’75 5 1760 1760 1760 Tot 1850 al . 104 104 214-71
* Creosoted, 10 ft, X 10 in. X 5 in,