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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106
Hoop-Iron.— Weight of Ten Lineal Feet.
Width in inches and parts .. I t 7 > 1 1% 11 11 11 13 14 2
No. of gauge 21 20 19 18 17 16 15 14 13 12
Weight in lbs. and decimal) parts j .685 .885 1.24 1.60 2.05 2.73 3.40 3.72 4.72 6.06
Velocity of Wind.
Miles per hour. Feet per second. Names. Miles per hour. Feet per second. Names.
1 2 3 4 5 10 15 20 25 1.47 2.93' 4.40' 5.87 1 7.33 J 11.67 22.00 29.34 36.67 Light Airs Breeze Brisk Gale Fresh Gale 30 35 40 45 50 55 80 100 40.011 51.34 J 58.68I 66.01J 73.35) 88.02 J 117.361 146.70J Strong Gale Hard Gale Storm Hurricane
Wind’s Impulse.
Velocity feet per second. Impulse on a square foot, in pounds. Velocity feet per second. Impulse on a square foot, in pounds.
10 0.229 90 18.526
20 0.915 100 22.872
30 2.059 110 27.675
40 3.660 120 32.926
50 5.718 130 38.654
60 8.234 140 44.830
70 11.207 150 51.462
80 14.638