Excerpt from Guide to the Grading of Structural Timbers and the Determination of Working Stresses
Holes may be caused by the dropping out of knots; by the peck to which some species, principally Cypress, are subject; by insects and worms that attack wood; or by tools used in handling logs or timbers. The effect of knot holes or of loose or encased knots is' likely to be less than that of tightly intergrown knots of the same size because of the usually lesser deviation of grain. The effect of holes from other causes is due principally to the absence of wood and the cutting across of fibers, and as such holes do not cause deviations of grain, the effect is less than that of knots of the same sizes.
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Paperback. Condition: New. Print on Demand. This book provides instruction on grading and using structural timbers for commercial construction applications. Originally issued by the United States Department of Agriculture in 1934, this is a foundational reference for builders, architects, and engineers seeking a deeper understanding of the material properties of timber and how it relates to structural integrity. This book provides a contextual overview of how timber is used in construction, going on to discuss how the quality of wood is assessed and separated into strength grades for building codes and standards. Further, the author reviews the effects of seasoning, or drying out the timber, on its quality and strength. The book concludes with discussions on the influence of specific factors, such as cross grain patterns and shakes, on a timber's strength, as well as the calculation of working stresses based on the relevant factors. While the book's age may suggest a lack of modern knowledge, the principles covered in this book continue to be the foundation for modern grading and usage standards for structural timber in the present day. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Seller Inventory # 9781528427463_0
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PAP. Condition: New. New Book. Shipped from UK. Established seller since 2000. Seller Inventory # LX-9781528427463
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PAP. Condition: New. New Book. Shipped from UK. Established seller since 2000. Seller Inventory # LX-9781528427463
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Seller: moluna, Greven, Germany
Condition: New. KlappentextrnrnExcerpt from Guide to the Grading of Structural Timbers and the Determination of Working StressesHoles may be caused by the dropping out of knots by the peck to which some species, principally Cypress, are subject by ins. Seller Inventory # 2149128948
Quantity: Over 20 available