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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65
more here than supp1y tables of the prices of different kinds of
roof suitable for ordinary purposes.
The simple roof of corrugated iron in the arched form is, in
moderate spans, often employed without any framing, save light
horizontal tie-bars at intervals connecting the opposite wall plates or
gutters, to counteract the thrust of the arch. This is an inexpensive
kind of roof, and, in spans not exceeding 35 feet, may be employed
with advantage for sheds or buildings of an inferior class. It is,
however, necessary to say in reference to such roofs, that the amount
of material of which they are composed is quite inconsistent with
the results of calculation upon which the details of the roofs above
referred to are designed; and they cannot be recommended as suitable
for buildings of a permanent character, although they do often
withstand for many years the periodical gales, in a manner difficult to
reconcile with the small amount of material in them.
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