SEDL / STP / STP353-EB / STP45113S

“Stress-O-Matic” Stress-Rating System

Bolger, R. J.
associated, Western Pine Association, Portland, Ore

Rasmussen, C. A.
associated, Western Pine Association, Portland, Ore

Pages: 9    Published: Jan 1964

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Abstract

The Western Pine Assn. Research Laboratory over the past four years has developed a long-sought mechanical stress rating system. The system was developed as an alternate means of stress rating of dimension lumber and provides: (1) More complete utilization of lumber’s inherent strength, (2) greater accuracy of stress rating lumber, (3) full length stress rating of the board, and (4) increased speed with greater reliability.