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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 208
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Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 208
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Book Description
Author: Michael A. Ritter
Publisher:
ISBN: 9781410221919
Category : Technology & Engineering
Languages : en
Pages : 500
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Book Description
Timber's strength, light weight, and energy-absorbing properties furnish features desirable for bridge construction. Timber is capable of supporting short-term overloads without adverse effects. Contrary to popular belief, large wood members provide good fire resistance qualities that meet or exceed those of other materials in severe fire exposures. From an economic standpoint, wood is competitive with other materials on a first-cost basis and shows advantages when life cycle costs are compared. Timber bridges can be constructed in virtually any weather conditions, without detriment to the material. Wood is not damaged by continuous freezing and thawing and resists harmful effects of de-icing agents, which cause deterioration in other bridge materials. Timber bridges do not require special equipment for installation and can normally be constructed without highly skilled labor. They also present a natural and aesthetically pleasing appearance, particularly in natural surroundings. The misconception that wood provides a short service life has plagued timber as a construction material. Although wood is susceptible to decay or insect attack under specific conditions, it is inherently a very durable material when protected from moisture. Many covered bridges built during the 19th century have lasted over 100 years because they were protected from direct exposure to the elements. In modem applications, it is seldom practical or economical to cover bridges; however, the use of wood preservatives has extended the life of wood used in exposed bridge applications. Using modem application techniques and preservative chemicals, wood can now be effectively protected from deterioration for periods of 50 years or longer. In addition, wood treated with preservatives requires little maintenance and no painting. Another misconception about wood as a bridge material is that its use is limited to minor structures of no appreciable size. This belief is probably based on the fact that trees for commercial timber are limited in size and are normally harvested before they reach maximum size. Although tree diameter limits the size of sawn lumber, the advent of glued-laminated timber (glulam) some 40 years ago provided designers with several compensating alternatives. Glulam, which is the most widely used modem timber bridge material, is manufactured by bonding sawn lumber laminations together with waterproof structural adhesives. Thus, glulam members are virtually unlimited in depth, width, and length and can be manufactured in a wide range of shapes. Glulam provides higher design strengths than sawn lumber and provides better utilization of the available timber resource by permitting the manufacture of large wood structural elements from smaller lumber sizes. Technological advances in laminating over the past four decades have further increased the suitability and performance of wood for modern highway bridge applications.
Author: Henry H. Gibson
Publisher:
ISBN:
Category : Timber
Languages : en
Pages : 734
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Author: S. M. Hulse
Publisher: Farrar, Straus and Giroux
ISBN: 0374716552
Category : Fiction
Languages : en
Pages : 272
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Book Description
Winner of the Christianity Today Book Award, Fiction In Eden Mine, the award-winning author of Black River examines the aftershocks of an act of domestic terrorism rooted in a small Montana town on the brink of abandonment, as it tears apart a family, tests the faith of a pastor and the loyalty of a sister, and mines the deep rifts that come when the reach of the government clashes with individual freedom If I stay here, Jo, I know you could find me. If you wanted to, you could find me. For generations, the Fabers have lived near Eden Mine, scraping by to keep ahold of their family's piece of Montana. Jo and her brother, Samuel, will be the last. Despite a long battle, their property has been seized by the state through eminent domain—something Samuel deems a government theft. As Jo packs, she hears news of a bombing. Samuel went off to find work in Wyoming that morning, but soon enough, it's clear that he's not gone but missing, last seen by a security camera near the district courthouse?now a crime scene?in Elk Fork. And the nine-year-old daughter of a pastor at a nearby church lies in critical condition. Can the person Jo loves and trusts most have done this terrible thing? Can she have missed the signs? The last time their family met violence, Jo lost her ability to walk. Samuel took care of her, outfitted their barn with special rigging so she could still ride their mule. What secrets has he been keeping? As Jo watches the pastor fight for his daughter, watches the authorities hunt down a criminal, she wrestles with an impossible choice: Must she tell them where Samuel might be? Must she choose between loyalty and justice? Between the brother she knows and the man he has become? A timely story of the tensions splintering families and communities all over this country, S.M. Hulse's Eden Mine is also a steady-eyed gaze into the ideals of the West and the legacies of violence, a moving account of faith in the face of evil, and a heartrending reckoning of the terrible choices we make for the ones we love.
Author: Gary Snyder
Publisher: Catapult
ISBN: 1582439354
Category : Religion
Languages : en
Pages : 206
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Book Description
A collection of captivatingly meditative essays that display a deep understanding of Buddhist belief, wildness, wildlife, and the world from an American cultural force. With thoughts ranging from political and spiritual matters to those regarding the environment and the art of becoming native to this continent, the nine essays in The Practice of the Wild display the deep understanding and wide erudition of Gary Snyder. These essays, first published in 1990, stand as the mature centerpiece of Snyder's work and thought, and this profound collection is widely accepted as one of the central texts on wilderness and the interaction of nature and culture.
Author: Anthony Godfrey
Publisher: U.S. Government Printing Office
ISBN:
Category : Nature
Languages : en
Pages : 688
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Book Description
"United States Department of Agriculture, Forest Service, Pacific Southwest Region"
Author: Donald J. Mead
Publisher: Food & Agriculture Organization of the UN (FAO)
ISBN: 9789251076347
Category : Forest management
Languages : en
Pages : 0
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Book Description
"Pinus radiata (radiata pine) is a versatile, fast-growing, medium-density softwood, suitable for a wide range of end-uses. Its silviculture is highly developed, and is built on a rm foundation of over a century of research, observation and practice. Radiata pine is often considered a model for growers of other plantation species. This book explores current knowledge of, and experience with radiata pine forest plantation management and examines its long-term sustainability. Radiata pine management needs to integrate the biological aspects of tree-growing, with socio-economics, management objectives, practical considerations and other constraints and opportunities. Although stands of radiata pine may appear to be simple, they are actually quite complex ecosystems because they contain large, long-lived trees that change dramatically over time and interact in changing ways with the environment and with other organisms. The focus of this book is on the principles and practices of growing radiata pine sustainably. It also looks ahead to emerging challenges facing radiata pine plantation management, such as the effects of climate change, new diseases and other threats, and meeting changing product needs and societal demands."--Page 4 of cover.
Author: Henry Solon Graves
Publisher: Forgotten Books
ISBN: 9781391618043
Category :
Languages : en
Pages : 144
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Book Description
Excerpt from The Black Hills Forest Reserve The ranches are taken up as placer claims in 20-acre plats, and in this way long strips of cultivable land are obtained along the open val leys. Probably there are not, on an average, more than 30 to 40 acres of plowed land on each ranch, the rest of the Open area being used for hay or pasture. There are altogether 450 to 460 ranches in the tim bered portion of the Black Hills. In the foothills, below the timber line, there are a great number of ranches scattered along the streams and on rich flats. 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.
Author: Norman MacLean
Publisher: University of Chicago Press
ISBN: 022647223X
Category : Fiction
Languages : en
Pages : 263
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Book Description
The New York Times–bestselling classic set amid the mountains and streams of early twentieth-century Montana, “as beautiful as anything in Thoreau or Hemingway” (Chicago Tribune). When Norman Maclean sent the manuscript of A River Runs Through It and Other Stories to New York publishers, he received a slew of rejections. One editor, so the story goes, replied, “it has trees in it.” Today, the title novella is recognized as one of the great American tales of the twentieth century, and Maclean as one of the most beloved writers of our time. The finely distilled product of a long life of often surprising rapture—for fly-fishing, for the woods, for the interlocked beauty of life and art—A River Runs Through It has established itself as a classic of the American West filled with beautiful prose and understated emotional insights. Based on Maclean’s own experiences as a young man, the book’s two novellas and short story are set in the small towns and mountains of western Montana. It is a world populated with drunks, loggers, card sharks, and whores, but also one rich in the pleasures of fly-fishing, logging, cribbage, and family. By turns raunchy and elegiac, these superb tales express, in Maclean’s own words, “a little of the love I have for the earth as it goes by.” “Maclean’s book—acerbic, laconic, deadpan—rings out of a rich American tradition that includes Mark Twain, Kin Hubbard, Richard Bissell, Jean Shepherd, and Nelson Algren.” —New York Times Book Review Includes a new foreword by Robert Redford, director of the Academy Award–winning film adaptation
Author: Wilfred M. Husted
Publisher:
ISBN:
Category : Animal remains (Archaeology)
Languages : en
Pages : 254
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Book Description
