≫ Download Timber Framing Classic Reprint Henry Dievendorf Dewell Books

Timber Framing Classic Reprint Henry Dievendorf Dewell Books

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With some of the theories advanced, and conclusions drawn, there may be differences of opinion. I am frank to state that certain of these conclusions may have to be modified in the light of future tests. It is always unwise to attempt to extend the results of tests too far. However, until such further tests are made, it is imperative that working-values be established for present use. The best that can be done under those circumstances is to use the most reasonable theory that can be found, utilizing the available tests as a guide. This method is certainly better than a blind guess, or a rule-of-thumb method. As an illustration of the condition just mentioned, the present method or methods of designing bolted joints may be cited. I wish to acknowledge the assistance of W. L. Huber, E. L. Cope, and C. H. Munson. Especial acknowledgement is due to A. W. Earl and T. F. Chace for aid in making calculations, and for valuable criticism and suggestions in the preparation of the text, and to Robert S. Lewis of the University of Utah, for the material on timber mine-structures contributed by him. I desire, also, to express my appreciation of the courtesy of the publishers of Engineering Record, Engineering News, Engineering and Mining Journal, and to the American Railway Engineering Association for permission to reproduce material from their publications. Henry D. Dewell. San Francisco, May 1, 1917.
(Typographical errors above are due to OCR software and don't occur in the book.)

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