 If the iron be not suff1ciently tough and ductile it will, when corrugated, crack; and though the openings may be so small as to escape cursory examination, they will, when exposed to the weather, rapidly become rusty, and render the whole sheet worthless....  Works in Iron: Bridge and Roof Structures - Page 213by Ewing Matheson - 1877 - 343 pagesFull view - About this book
 | 1892 - 566 pages
...iron is exposed, a certain action is set up in moist air which ends in the destruction of the sheet. " The sheets are generally galvanised before they are corrugated ; but as in process of corrugation the sheets, especially the thicker ones, sometimes crack slightly on the surface... | |
 | James Davies (of London.) - 1899 - 158 pages
...and destruction. If the iron is not sufficiently tough and ductile, it will crack when corrugated, and, though the openings may be so small as to escape...become rusty and render the whole sheet worthless. The quality also depends on the degree of purity possessed by the spelter. Spelter is the name given in... | |
 | 1903 - 456 pages
...iron is exposed, a certain action is set up in moist air which ends in t he destruction of the sheet. The sheets are generally galvanised before they are corrugated; but as in process of corrugation the sheets, especially the thicker ones, sometimes crack slightly on the surface... | |
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