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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Safe Load in Structures.
In cast-iron columns
Wrought-iron structures.
In cast-iron girders for tanks
In ditto for bridges and floors
In timber .
Stone and bricks
. = J breaking weight.
• =i„
• == * » »
- =J »
• =10
Relative Strength of Beams or Girders.
Relative strength.
Supported at one end and loaded at the other . . . = 1
Supported at one end and load distributed . . . . = 2
Supported at both ends and load at centre . . . . = 4
Supported at both ends and load distributed . . . = 8
OB CONVERSELY.
Supported at both ends and load distributed . . . — 1
Supported at both ends and load at centre . . . . = *
Supported at one end, load distributed . . . . == *
Supported at one end, load at the other end . . . = }
Strength of Rolled-iron Beams.
BW = Breaking Weight distributed in Tons.
Depth of Beam. Size of Flange. BW for different Spana
10 ft. 15 ft. 20 ft. 25 ft.
5 in. 2 X 4 in. 6-6
6 „ 2 X % „ 10 6-6 5
7 „ 3 X J„ 14 9 7 5
8 „ 3 X 3, 20 13 10 8
9 » 4 X < „ 36 24 18 14
10 „ 41 X1 » 60 40 30 24