Important Structural Properties of Four Western Softwoods: White Pine, Sugar Pine, Western Redcedar, and Port-Orford-Cedar.
Forest Service research paper,
FOREST PRODUCTS LAB MADISON WIS
Pagination or Media Count:
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
- Wood, Paper and Related Forestry Products