Building construction and superintendence, by F.E. Kidder ... (1896)
Kidder, Frank E. (Frank Eugene), 1859-1905 · New York, W.T. Comstock · leaf 168
al in the long run ; they are also easily dented. Copper is the most durable of all materials and should be usedwhen the rest of the construction will warrant the expense. Galvanized iron, however, makes a very durable conductor, whenkept painted, and if made of suitable thickness is not easily… … ;rrri^> Fig. 144.—Steams Patent Cypress Conductor and Malleable Wall Irons. 16-ounce cold rolled copper. With both metals the joints should beboth soldered and riveted. Metal conductors may be round, octa-gon or rectangular in section, but should contain some provision forexpansion in case of…
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