Fire Control Notes Vol 11

Author : United States. Forest Service
Publisher : Forgotten Books
ISBN 13 : 9780266591047
Total Pages : 422 pages
Book Rating : 4.5/5 (91 download)

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Download or read book Fire Control Notes, 1939, Vol. 3 written by United States. Forest Service and published by Forgotten Books. This book was released on 2017-10-22 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Fire Control Notes, 1939, Vol. 3: A Quarterly Periodical Devoted to the Technique of Fire Control Previous to 1933 lookout towers purchased on the basis of plans and specifications were of structural steel. About that time there were coming into use in this country, timber connectors which, in comparison with ordinary bolted or spiked joints, greatly facilitated the transmission of stress through joints in timber structures. The connectors as used in Forest Service lookout-tower construction consist of metal rings which are placed between two timbers, the connecting bolt passing through the center of the ring. The ring, with half its width projecting into the contacting face of each timber, transmits the stress from one timber to the other. These connectors are commonly used in CCC portable camp buildings. The development of the timber connectors and resultant increased possibilities for economical use of timber led to its consideration for lookout towers, a matter in which the lumber industry and the Forest Service were much interested. An attempt to purchase towers showed that the industry was not prepared to produce prefabricated timber in competition with the steel industry, where prefabrication was a long established practice. However, in View of the Forest Service's interest in developing the economical utilization of woods, eight towers were purchased on a specification restricted to timber, as an experimental project. Reports of this project indicated that fabrication was decid edly defective, causing long delays during erection. As a result, tower bids were again limited to steel. Pressure on the Forest Service to consider timber gradually in creased as the timber industry improved its methods of prefabrication and the large purchases of towers in connection with the CCC program so stimulated this pressure that the subject was reopened. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.