Accession Number : AD0758062

Title :   Important Structural Properties of Four Western Softwoods: White Pine, Sugar Pine, Western Redcedar, and Port-Orford-Cedar.

Descriptive Note : Forest Service research paper,

Corporate Author : FOREST PRODUCTS LAB MADISON WIS

Personal Author(s) : Bendtsen,Alan

Report Date : 1972

Pagination or Media Count : 19

Abstract : The most comprehensive evaluation ever conducted on white and sugar pines, western redcedar, and Port-Orford-cedar has provided new values for the important mechanical properties and specific gravity. Samples were collected at random, permitting a better assessment of the reliability of the property estimates. Specimens from 135 5-foot bolts, each bolt from a randomly selected tree, were tested to arrive at the final values. Numerous differences appear between previously established property values and those obtained here: 31 of 64 property values were changed significantly in this latest evaluation. No species showed a consistent increase or decrease in all properties at either green or airdry moisture condition. However, in each species at least two important green property values that are the basis for development of structural design properties were changed significantly. The only consistent change was in shear parallel to grain, which increased in all species at both moisture conditions. (Author)

Descriptors :   (*WOOD, STRUCTURAL PROPERTIES), QUALITY CONTROL, VOLUME, DENSITY, MOISTURE, SAMPLING, SELECTION, RUPTURE, MODULUS OF ELASTICITY, GRAIN SIZE, STATISTICAL DATA, COMPRESSIVE PROPERTIES

Subject Categories : Wood, Paper and Related Forestry Products

Distribution Statement : APPROVED FOR PUBLIC RELEASE