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" muckbars" (the result of first rolling from puddle blooms), cutting and piling them, reheating to a welding heat, rolling into bars, then cutting, piling, and reheating again, when they are rolled to the needed sizes. Compression pieces are single refined,... "
Railroad Economics: Or, Notes, with Comments from a Tour Over Ohio Railways ... - Seite 28
von Stillman Williams Robinson - 1882 - 131 Seiten
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Transactions of the American Society of Mechanical Engineers

American Society of Mechanical Engineers - 1881
...differ for different parts of bridges. Tension members are never made of anything but "double refined" iron, that is, iron that has been double rolled. This...its thickness without fracture; and when knicked and broken should show a fibrous structure. Such iron in the regular truss tension members is usually allowed...
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Van Nostrand's Engineering Magazine, Band 26

1882
...the ultimate or elastic resistance of the iron adopted for the allowable strain for all parts of any one bridge. The factor of safety is " a thing that...its thickness without fracture; and when knicked and broken should show a fibrous structure. Such iron in the regular truss tension members is usually allowed...
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