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
Søgning i bogen
Den bedste måde at søge i bogen er ved at downloade PDF'en og søge i den.
Derved får du fremhævet ordene visuelt direkte på billedet af siden.
Digitaliseret bog
Bogens tekst er maskinlæst, så der kan være en del fejl og mangler.
102
For flooring, 13 to 2 cwt. per square foot, exclusive of the weight
of the flooring, is generally allowed. In store-houses from 2 to
4 cwt. per square foot.
BOWSTRING BRIDGES.
T = Tension of main tie and
= Thrust of arch at crown, in tons.
S = Span „ „ in feet.
R = Rise „ „ in feet.
L = Total load distributed, in tons.
x = Distance of any part from centre of girder, in feet.
m L S
8R
Thrust at any other part of arc = • Te+Le x2
Greatest tension at any perpendicular = N nearly, when
N = number of parts into which the arc is divided by
the perpendiculars.
PILE DRIVING.
D = Set of pile by the last blow in inches.
H = Height the ram has fallen in inches.
L = Safe load for the pile in cwts.
T WH
L = 8 D approximately.
W = 4 cwt. in ordinary pile engines.
WROUGHT-IRON GIRDERS.
D = Depth of girder, in inches.
A = Area of bottom flange, in inches.
S = Span, in inches.
W = Breaking weight, in tons.