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23 results found
Because of its biological nature, which is influenced by many factors as discussed in Chapter 6, the quality of timber is enormously variable. Therefore, some sort of arrangement or classification must be undertaken prior to its use, in order to get the most out of this valuable resource. It is…
Author(s): David E. Kretschmann, Roland Hernandez
Keywords: Wood, mechanical properties, lumber, timber, wood grading, elasticity, grading, elasticity, grading, engineered wood, modulus of elasticity, glued assemblies, wood strength, structural timbers, stiffness
Source: Primary wood processing : principles and practice. Dordrecht : Springer, c2006: ISBN: 1402043929: 9781402043925: pages 339-390.
Year: 2006
The degradation of a wood load-bearing (in-service) member may be caused by any one of several organisms that derive their nourishment or shelter from the wood substrate in which they live. Consequently, it is important to periodically inspect wood structures to determine their condition. A…
Author(s): Robert J. Ross, Xiping Wang
Keywords: White pine, structural timbers, building timbers, Quincy mine, blacksmith shops, degradation
Source: Structure magazine. (Sept. 2005): pages 32-34.
Year: 2005
Structural lumber markets have traditionally been dominated by softwood species. Historically, however, hardwood species have been extensively used for certain structural products such as timbers for railway and highway bridges, railway ties, mine timbers, and for pallets and containers. In the…
Author(s): David W. Green
Keywords: Merchantable volume, lumber grading, grading, valuation, elasticity, lumber, mechanical properties, modulus of elasticity, yield, structural timbers, grading, hardwoods
Source: Undervalued hardwood for engineered materials and components. Madison, WI : Forest Products Society ; Marquette, MI : Northern Initiative, [c2005]: Pages 31-50
Year: 2005
This paper discusses the effects of size and moisture content on stress wave properties of wood and evaluates the feasibility of using stress waves to E-rate Douglas-fir dimension lumber in green condition. Six size groups of Douglas-fir lumber were tested using both stress wave and static bending…
Author(s): Xiping Wang
Keywords: Wood grading, grading, flexure, mechanical properties, lumber, nondestructive testing, bending, moisture, stress waves, moisture content, elasticity, modulus of elasticity, wave mechanics, strength, structural timbers, bending strength, Douglas fir
Source: Proceedings of the 10th world conference on timber engineering : Miyazaki, Japan, 2008 June 2-5. [S.l. : s.n.], 2008: [8] pages.
Year: 2008
In an effort to encourage the development of value-added engineered applications for small-diameter round timber, research is being conducted at the US Forest Products Laboratory to develop and verify design guidelines for connections with specific application to round timbers. The objective of…
Author(s): Kug-Bo Shim, Ronald W. Wolfe, Marshall Begel
Keywords: Iron plates, steel plates, shear, elasticity, bending, value added, ponderosa pine, mechanical properties, nails, spikes, testing, fasteners, metals, joints, failure, utilization, wood, bending strength, shear strength, structural timbers, connectors, small-diameter timber, smallwood, small timbers, strength
Source: Wood and fiber science. Vol. 41, no. 3 (July 2009): p. 313-321.
Year: 2009
Author(s): Forest Products Laboratory
Keywords: Grading, structural timbers
Source: Technical note ; 200
Year: 1923
Since the interior of a charred wood member normally retains its structural integrity, large structural wood members often do not need to be replaced after a fire. Engineering judgement is required to determine which members can remain and which members need to be replaced or repaired. Due to the…
Author(s): Robert J. Ross, Brian K. Brashaw, Xiping Wang, Robert H. White, Roy F. Pellerin
Keywords: Post-fire assessment, building inspection, wood, deterioration, nondestructive testing, fire testing, pyrolysis, structural timbers, fire resistance, fire damage, charring, thermal degradation
Source: Wood and timber condition assessment manual. Madison, WI : Forest Products Society, 2005: pages 29-46.
Year: 2005
Wood is used extensively for both interior and exterior applications in the construction of a variety of structures (residential, agricultural, commercial, government, religious). The deterioration of an in-service wood member may result from a variety of causes during the life of a structure. It…
Author(s): Robert J. Ross, Brian K. Brashaw, Xiping Wang
Keywords: Wood deterioration, structural analysis, engineering inspection, nondestructive testing, building inspection, structural timbers
Source: Forest products journal. Vol. 56, no. 6 (June 2006): pages 4-8.
Year: 2006
The first report of a three-part series that covers results of a full-scale roof assemblies research program. The focus of this report is the structural performance of truss assemblies comprising trusses with abnormally high stiffness variability and critical joint strength. Results discussed…
Author(s): R.W. Wolfe, Monica McCarthy
Keywords: Roof assembly, Fink truss, truss plate connections, superposition, assembly performance, construction technology, structural timbers, Pinus, structural design, stresses, structural components, trusses, assembly performance, light frame construction
Source: Res. Pap. FPL-RP-492. Madison. WI: U.S. Department of Agriculture. Forest Service. Forest Products Laboratory: 41 pages.
Year: 1989
In the living tree, wood contains large quantities of water. As green wood dries, most of the water is removed. The moisture remaining in the wood tends to come to equilibrium with the relative humidity of the surrounding air. Correct drying, handling, and storage of wood will minimize moisture…
Author(s): William T. Simpson
Keywords: Wood moisture, moisture content, drying, shrinkage, dimensions, structural timbers, warping
Source: Wood handbook : wood as an engineering material. Madison, WI : USDA Forest Service, Forest Products Laboratory, 1999. General technical report FPL ; GTR-113: Pages 12.1-12.20
Year: 1999