The Viaduct Works' Handbook
Forfatter: Henry N. Maynard
År: 1868
Forlag: E. And F. N. Spon
Sted: London
Sider: 108
UDK: 624.3
Being A Collection Of Examples From Actual Practice Of Viaducts, Bridges, Roofs, And Other Structures In Iron; Together With Tables Of Prices, Weights, And Other Information Useful To Engineers In Design And Estimating Wrought And Cast-Iron Work
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7
The weight of ironwork per span for the double way is as
follows:—
Tons cwts.qrs. lbs.
Tension bars . . 14 7 2 2
Compression bars . . 17 0 2 21
Diagonal struts . 9 13 0 22
„ties. . 6 19 118
Gusset bracing .411 320
Pins, bolts, nuts, &c. . 3 17 2 27
Bearing blocks, &c. . 0 2112 • Tons cwts. qrs.lbs.
For one pair main girders 56 13 3 10 X 2 = 113 7 2 20
Flooring of wrought-iron plates and cross girders 50 5 0 0
163 12 2 20 per span,
or 1-09 tons per foot run, including flooring; and taking the value of
the ironwork, delivered f. o. b. in an English port, at £16 per ton, it
brings the price to about £17 9s. per foot run.
The whole of the wrought-iron used in the above was manufac-
tured at Blaenavon Works, which are situated within a few miles of
the spot. The handrailing is formed of light ornamental cast-iron,
bolted to the platform. The gross cost of this bridge, piers and
abutments included, was £68,800, or about £41 10s. per foot run.
It was erected immediately on the site of the Viaduct Works of
Messrs. Kennard Brothers, by whom it was designed and carried
out, and the cost of erection is included. Many other bridges of
this class have been made since the Crumlin Viaduct; amongst
others made at the same works may be mentioned Barrakur Bridge.