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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and are generally about £9 per set more than the above. Fig. 3
represents the half of a set of ordinary flange or bridge-rail switches,
rivetted to wrought-iron plates. Fig. 4 represents a pair of strong
bridge rail switches, with wrought-iron plates, mounted on timber.
These are more costly than the above; but they are, however, very
durable, and have been adopted for many years on the Great Western
Railway of England, and a large quantity have been manufactured
here for export to Australia.
Crossings.—These are made in great variety. A very good