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| Title | Publication | Publish Year |
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Relation of Specific Gravity to Rings-Per-Inch in Cottonwood Construction Lumber
Nine hundred paired measurements of specific gravity and rings-per-inch were made on Populus deltoides Bartr. from 15 sawmills scattered over Illinois. Specific gravity was determined by immersion and rings-per-inch counted […]
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Forest Products Journal | 1968 |
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Relationship Between Early Decay and Radial Compression Strength of Douglas-Fir
The ability of radial compression strength (RCS) to indicate early decay in Douglas-fir was examined. Plugs 3/8 inch in diameter and 3/4 inch long, cut from the sapwood and heartwood […]
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Forest Products Journal | 1983 |
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Relationship of Bending Strength to Stiffness of Yellow-Poplar 2 By 4’s
Moduli of rupture (MOR) and elasticity (MOE), both flatwise (MOEF) and edgewise (MOEN), of 256 yellow-poplar 2 by 4’s containing knots were determined. MOR, MOE, specific gravity based on green […]
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Forest Products Journal | 1983 |
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Relationship of Fiber Preparation and Characteristics to Performance of Medium-Density Hardboards
Techniques of characterizing and processing wood fibers were investigated as a means of evaluating the effects of raw material manipulation on strength properties and dimensional movement of hardboard. Four species […]
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Forest Products Journal | 1983 |
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Relationship of Flake Size and Resin Content to Mechanical and Dimensional Properties of Flake Board
Ratio of flake length to thickness is a better indicator of flake board properties than is either dimension independently. Increases in resin spread increase bending strength only moderately. Stiffness is […]
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Forest Products Journal | 1961 |
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Relationship of Moisture Content and Flexural Properties in 25 Commercial Hardboards
Twenty-five types of commercial hardboard were studied representing ten different companies with treated and untreated boards in 1/8- and 1/4-inch thicknesses. Three manufacturing processes–wet, semidry, and dry–were represented. The hardboard […]
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Forest Products Journal | 1956 |
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Relationship of Specific Gravity to Moduli of Rupture and Elasticity in Commercial Hardboard
A total of 36 different types of commercial hardboard were studied, obtained from 11 producers in Canada and in the U.S. Five basically different processes, three thicknesses, and two classes […]
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Forest Products Journal | 1958 |
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Relationships Between Transverse Free Vibration E and Other Properties, as Affected By Knots
Dynamic E was measured in two different modes, flat-wise (EDF) and edgewise (EDE), in transverse free vibration by the Irvington E-computer. Static E’s were measured and compared to dynamic E’s. […]
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Forest Products Journal | 1977 |
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Reliability-Based Design Procedures for Wood Structures
Probabilistic methods provide a rational and consistent way to balance the competing demands of safety and economy. They are universal in that they apply to all materials and all facets […]
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Forest Products Journal | 1977 |
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Research Needed on Tensile Strength of Wood
The need for additional information on the testing of the tensile strength of wood is discussed. Early studies were made on small clear specimens and standard procedures evolved. Tensile strength […]
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Forest Products Journal | 1964 |
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Research Program to Develop Performance Specifications for the Veneer-Particleboard Composite Panel
A broad summary is given of a research program to develop performance specifications for veneer-particleboard composite panels. The program, which is being conducted by the American Plywood Association (APA) in […]
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Forest Products Journal | 1975 |
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Research–A Basis for Structural Engineering with Wood
The economic use of wood for structures requires the application of non-destructive test methods to lumber grading. Some such methods are ready for adoption by industry. Information on probable loadings […]
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Forest Products Journal | 1962 |
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Residual Strength of Fire-Damaged Laminated Beams
Three 50-foot, glued-laminated, Douglas-fir beams damaged by fire were tested for residual strength by, bending 10-foot lengths from each end for longitudinal-shear strength, and by bending the remaining central 30-foot […]
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Forest Products Journal | 1974 |
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Resin Distribution in Flakeboard Shown By Ultraviolet Light Photography
Color photomicrographs of particleboard cross sections by ultraviolet light give new important information on flake-to-flake bonding. The photographs, taken of cross sections of particleboards glued with resins containing a dye […]
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Forest Products Journal | 1968 |
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Resin Treatments for Improving Dimensional Stability of Structural Fiberboard
Hardboards were made more stable by adding a small amount of water-soluble phenolic resin to the surfaces of the wet mat. Thickness stability and bending strength were increased. This type […]
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Forest Products Journal | 1968 |
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Resistance of Casein Glue Joints to Shear Fatigue Stressing
The fatigue strength of casein glues determined from a specimen subjected to torsional shear indicates that at 10,000,000 cycles, the practical end point in fatigue testing, the strength is only […]
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Forest Products Journal | 1961 |
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Resistance of Wood to Chemical Degradation
Strength loss and chemical changes in wood exposed to. acid and base solutions were measured, using wood from 11 hardwoods and two softwoods. Species used included: Douglas-fir (Pseudotsuga menziesii), Caribbean […]
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Forest Products Journal | 1966 |
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Resistance Strain Gages and Adhesives for Wood
A number of foil and wire strain gages along with nine different bonding adhesives were evaluated for their accuracy in strain measurement on sugar pine (Pinus lambertiana Douglas). In measuring […]
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Forest Products Journal | 1971 |
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Response of Nailed Wood-Joist Floors to Static Loads
Forty-four laboratory-built wood-joist floors, divided into two groups with, respect to types of joists, subfloor, and finish floor, were tested and analyzed to establish their structural performance under concentrated loads […]
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Forest Products Journal | 1972 |
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Reverse Proofloading of Lumber
The determination of the strength distribution of a given structural grade of lumber from any chosen mill is of growing concern to the lumber industry. Lumber in the lower range […]
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Forest Products Journal | 1982 |
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Review of Incising and Its Effects on Strength and Preservative Treatment of Wood
Various techniques developed in this century for incising round and sawed wood, as well as studies on the effects of incising both softwoods and hardwoods, are reviewed. The review shows […]
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Forest Products Journal | 1978 |
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Review: 1980 Particleboard Literature in Non-U.S. Journals
The reports discussed in this review are divided into three sections. The first, on particleboard manufacture, includes the characteristics of a series of urea resins made with different proportions of […]
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Forest Products Journal | 1981 |
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Rheology and the Study of Wood
Rheology is the analysis of the deformation and flow of materials as the result of deforming forces. Phenomenological rheology describes the behavior of the material being subjected to force, and […]
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Forest Products Journal | 1962 |
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Rolling Shear Characteristics of Nine Structural Softwoods
Rolling shear properties were evaluated on a random sample of nine structural softwood species: Red, white, and black spruce; balsam fir; subalpine fir; Port-Orford cedar; western redcedar; sugar pine; and […]
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Forest Products Journal | 1976 |
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Rolling Shear Properties of Southern Pine Plywood and Undirectionally Laminated Veneer
Rolling shear stresses and deformations develop in certain structural members made either entirely or partially from structural plywood. Such structures may be box-beams, I-beams, gusset plates, and stressed-skin panels. Although […]
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Forest Products Journal | 1982 |