With relative humidity and temperature data from the National Oceanic and Atmospheric Administration, the average equilibrium moisture content for each month of the year was calculated for 262 locations in the United States and 122 locations outside the United States. As an aid for storage of kiln-dried lumber, a graph is presented for determining the reduction in equilibrium moisture content that results from heating air in an enclosed storage space above the temperature of the outside air.
Drying Hardwood Lumber focuses on common methods for drying lumber of different thickness, with minimal drying defects, for high quality applications. This manual also includes predrying treatments that, when part of an overall quality-oriented drying system, reduce defects and improve drying quality, especially of oak lumber. Special attention is given to drying white wood, such as hard maple and ash, without sticker shadow or other discoloration. Several special drying methods, such as solar drying, are described, and proper techniques for storing dried lumber are discussed. Suggestions are provided for ways to economize on drying costs by reducing drying time and energy demands when feasible. Each chapter is accompanied by a list of references. Some references are cited in the chapter; others are listed as additional sources of information.
Wood is formed in an essentially water-saturated environment in the living tree, and the cell wall remains in this state until the water flow from the roots is interrupted, such as by felling the tree. The wood then begins to lose most of its moisture by drying, resulting in changes in most of its physical properties. These changes, and their relationship to the environment to which the wood is subsequently ex posed, are the subject of this book. The text consists of six chapters. The first chapter discusses cer tain empirical relationships between wood and water, methods of measuring wood moisture content, factors which affect its equilib rium moisture content, and the effect of moisture content on wood strength. The second chapter treats the thermodynamics of moisture sorption by wood, inc1uding enthalpy, entropy, and free energy changes. The third chapter discusses some of the theories which have been proposed to explain the sorption isotherms for hygroscopic ma terials such as wood. Chapter 4 considers hygroexpansion or the shrinking and swelling of wood associated with moisture change. Chapter 5 is concerned with how moisture moves through the cell wall of wood in response to both moisture and temperature gradients. The sixth and final chapter discusses the theoretical and practical aspects of the electrical resistance and dielectric properties of wood, in c1uding the principles involved in their application in electrical moisture meters.
“A surprise best-seller which, apparently, has the power to turn even the most feeble of us into axe-wielding lumberjacks.” —Independent The latest Scandinavian publishing phenomenon is not a Stieg Larsson-like thriller; it’s a book about chopping, stacking, and burning wood that has sold more than 200,000 copies in Norway and Sweden and has been a fixture on the bestseller lists there for more than a year. Norwegian Wood provides useful advice on the rustic hows and whys of taking care of your heating needs, but it’s also a thoughtful attempt to understand man’s age-old predilection for stacking wood and passion for open fires. An intriguing window into the exoticism of Scandinavian culture, the book also features enough inherently interesting facts and anecdotes and inspired prose to make it universally appealing. The U.S. edition is a fully updated version of the Norwegian original, and includes an appendix of U.S.-based resources and contacts. “A how-to guide as well as a celebration of wood—its scent, its variability, and the way it can connect modern life to simpler times . . . You don’t need to have a wood-burning stove or fireplace to be captivated by the craft and lore surrounding a Stone Age method of creating heat.” —The Boston Globe “The book has spread like wildfire.” —Daily Mail “A how-to book with poetry at its heart.” —The Times Literary Supplement
This book explains step by step, with over 1800 photos and more than 600 illustrations how to layout and build your own electric guitar. Build an entire guitar in a small room on a homemade multifunctional work table. Only a router and some easy-to-make jigs are required to prepare the wood.
Much information is available for specific gravity and other properties of wood and bark, but it is widely scattered in the literature. This paper compiles information for estimation of biomass for 156 tree species found in North America for use in national forest inventory applications. We present specific gravities based on average green volume as well as 12 percent moisture content volume for calculation of oven-dry biomass. Additional information is included on bark thickness, bark voids, and bark percentages by species and green and dry weight of wood and bark. --
An in-depth examination of deterioration caused by fungi and other microorganisms, Wood Microbiology explores the major damages to wood and wood products during growth, harvesting, storage, and conversion to finished lumber. The characteristics, causes, detection, effects, and control measures for wood damage are stressed. - Reviews characteristics, classification, and metabolism of fungi responsible for wood deterioration and discoloration - Examines the anatomical, structural, and chemical features of decay - Covers effects of decay on physical and structural properties of wood - Presents methods for preventing biodegradation and for preserving wood - Extensively classroom tested--suitable for a two-quarter or one-semester course - Each chapter contains a summary and detailed references
