This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...tower construction, built by the same operating company under about the same conditions, where the steel tower line was built at a substantially lower first cost than that of the wood, as noted in Chapter XII. The company cites as the reason for the difference the fact that the tower line work, wire stringing and all, ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...tower construction, built by the same operating company under about the same conditions, where the steel tower line was built at a substantially lower first cost than that of the wood, as noted in Chapter XII. The company cites as the reason for the difference the fact that the tower line work, wire stringing and all, was done with common labor. With systematic plans for carrying on the work and with judicious selection of labor and equipment, there is no reason why the present average labor cost of steel tower construction cannot be reduced. CHAPTER VII Reinforced Concrete Construction Reinforced concrete poles are divided into two general classes, the solid and the hollow types; the latter include such as are built with the major portion hollow and the rest solid. The solid type is the one that has been used in a great deal of the construction of this character in the United States, probably the main reason being that isolated companies have all built their own poles, and the work being to a great extent a preliminary investigation as to the possibilities of concrete in line construction, have not cared to go to any great expense for forms or appliances, such as would be required for molding hollow poles. In the casting of solid poles most companies have employed horizontal forms, though there have been several instances of poles of great ' size where it "was deemed expedient on account of their weight, to build vertical forms at the pole locations and cast them in place, so that upon the removal of the forms the poles would be v;; Boitsr Detail of Splice Fig. 75.--Forms--Marseilles Land and Water Co.'s concrete pole. ready for service, after seasoning a reasonable length of time. The forms for poles consist of tapered troughs of usually square or he...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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New. Trade paperback (US). Glued binding. 308 p. In Stock. 100% Money Back Guarantee. Brand New, Perfect Condition, allow 4-14 business days for standard shipping. To Alaska, Hawaii, U.S. protectorate, P.O. box, and APO/FPO addresses allow 4-28 business days for Standard shipping. No expedited shipping. All orders placed with expedited shipping will be cancelled. Over 3, 000, 000 happy customers.