Stand-pipe Accidents and Failures in the United States: A Chronological Record of Accidents to and Failures of Water-works Stand-pipes in the United States ...

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Engineering News Publishing Company, 1895 - Standpipes - 195 pages
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Page 173 - ... phosphorus, and having an ultimate tensile strength of not less than 54,000 nor more than 62,000 pounds per square inch, an elastic limit not less than one-half the ultimate strength, an elongation of not less than 26 per cent, in eight inches and a reduction of area of not less than 50 per cent. at fracture, which shall be silky in character. Before or after being heated to a cherry red and quenched in water at 80 deg.
Page 137 - In estimating the strains to which engineering structures may be subjected by winds, the maximum pressures are, of course, the most important. The above formula gives a mean pressure corresponding to a mean wind velocity, it is important to note that momentary pressures as much as 35 per cent in excess of the above mean pressure may continually occur and recur.
Page 166 - Four rivets to be bent cold into the form of a hook with parallel sides without showing cracks or flaws.
Page 171 - The steel must be uniform in character for each specified kind. The finished bars, plates, and shapes must be free from cracks on the faces or corners, and have a clean, smooth finish. No work shall be put upon any steel at or near the blue temperature or between that of boiling water and of ignition of hard-wood sawdust.
Page 166 - Two rivets to be flattened out cold under the hammer to a thickness of one-half the diameter without showing cracks or flaws.
Page 174 - Beveling, etc. All calking edges shall be planed to a proper bevel. All parts must be adjusted to a perfect fit, and properly marked before leaving the shop. Erection. In assembling the work, the rivet holes shall match so that hot rivets may be inserted without the use of a hammer. Drifting is prohibited. Eccentric holes, if any, must be reamed, and if required, larger-sized rivets shall be used in such holes.
Page 155 - Before or after heating to a light yellow heat and quenching in cold water, this steel must stand bending 180 degrees to a curve, whose inner radius is equal to the thickness of the sample, without sign of fracture.
Page 157 - ... ordinary testing machine, but it diminishes its toughness under shock to a still greater degree, and this it is that unfits phosphoric steels for most purposes. (4) The effect of phosphorus on static ductility appears to be very capricious, for we find many cases of highly phosphoric steel which show excellent elongation, contraction and even fair elastic ratio, while side by side with them are others produced under apparently identical conditions but statically brittle. (5) If any relation between...
Page 163 - Wrought iron is generally used for field-rivets, because it is less liable to injury from overheating and from the decrease in temperature due to the loss of time in passing from the forge to the riveters. Steel properly heated would cool to a point below which it is not advisable to do any work upon it, and if heated to a temperature sufficient to compensate for the cooling it would be subjected to such oxidation as would make it "red-short.
Page 173 - Soft medium steel shall have an ultimate strength of from 55,000 to 65,000 pounds per square inch, as determined from standard test pieces; an elastic limit of not less than one-half the ultimate strength; an elongation of not less than 25 per cent in 8 inches; and a reduction of area at fracture of not less than 50 per cent. Samples to bend cold 180...

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