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The Condition of Steel in Bridge Pins
The engineer who receives a report of a large number of tests from plates, angles and other shapes used in his bridge, which indicates an excellent material, may naturally suppose that his bridge pins, made under the same specification, and perhaps from the same casts of steel, are of the same excellent quality. That such is not the case will be demonstrated.
A few years ago it was customary to accept bridge pins, and also other material, on the result of a test made on a specially rolled ¾ -in. round rod. The apparent simplicity and convenience of this method of testing was what led to its adoption, but it did not take long to demonstrate its inconvenience, and the fact that the steel was often in finished shapes before the test rods were rolled. This resulted in the substitution of tests from the finished material, with or without the round tests as a matter of record, and this substitution soon demonstrated that a small round test was not an accurate indication of the condition of steel in other shapes.
The Condition of Steel in Bridge Pins
The engineer who receives a report of a large number of tests from plates, angles and other shapes used in his bridge, which indicates an excellent material, may naturally suppose that his bridge pins, made under the same specification, and perhaps from the same casts of steel, are of the same excellent quality. That such is not the case will be demonstrated.
A few years ago it was customary to accept bridge pins, and also other material, on the result of a test made on a specially rolled ¾ -in. round rod. The apparent simplicity and convenience of this method of testing was what led to its adoption, but it did not take long to demonstrate its inconvenience, and the fact that the steel was often in finished shapes before the test rods were rolled. This resulted in the substitution of tests from the finished material, with or without the round tests as a matter of record, and this substitution soon demonstrated that a small round test was not an accurate indication of the condition of steel in other shapes.
The Condition of Steel in Bridge Pins
Cunningham, A. C. (author)
2021-01-01
91896-01-01 pages
Article (Journal)
Electronic Resource
Unknown
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