Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910 Tests of Creosoted Timber, Paper No. 1168
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Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910 Tests of Creosoted Timber, Paper No. 1168 - W. B. (William Benjamin) Gregory
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Civil Engineers, vol. LXX, Dec. 1910, by W. B. Gregory
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Title: Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910
Tests of Creosoted Timber, Paper No. 1168
Author: W. B. Gregory
Release Date: February 16, 2006 [EBook #17776]
Language: English
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AMERICAN SOCIETY OF CIVIL ENGINEERS
INSTITUTED 1852
TRANSACTIONS
Paper No. 1168
TESTS OF CREOSOTED TIMBER.
By W. B. Gregory, M. Am. Soc. C. E.
During the last few years a quantity of literature has appeared in which the treatment of timber by preservatives has been discussed. The properties of timber, both treated and untreated, have been determined by the Forest Service, United States Department of Agriculture, and through its researches valuable knowledge has come to engineers who have to deal with the design of wooden structures. There is very little information, however, regarding the effect of time on creosoted timber, and for this reason the results given herewith may prove of interest.
The material tested consisted of southern pine stringers having a cross-section approximately 6 by 16 in. and a length of 30 ft. For the purpose of testing, each beam was cut into two parts, each about 15 ft. long. This material had been in use in a trestle of a railroad near New Orleans for 26 years. The stringers were chosen at random to determine the general condition of the trestle. The timber had been exposed to the weather and subjected to heavy train service from the time it was treated until it was tested. The annual rainfall at New Orleans is about 60 in., and the humidity of the air is high. In spite of these conditions, there was no appearance of decay on any of the specimens tested. The specifications under which the timber was treated were as follows:
Timber.
The timber for creosoting shall be long-leafed or southern pine. Sap surfaces on two or more sides are preferred.
Piles.—The piles shall be of long-leafed or southern pine, not less than 14 in. at the butt. They shall be free from defects impairing their strength, and shall be reasonably straight.