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Madison, WI 53726-2398
Phone: (608) 231-9200
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Title: Structural lumber from suppressed-growth ponderosa pine from northern Arizona

Source: Forest products journal. Vol. 57, no. 12 (Dec. 2007): Pages 42-47.

Author(s): Gorman, Thomas M.; Green, David W.; Cisternas, Aldo G.; Hernandez, Roland; Lowell, Eini C.

Publication Year: 2007  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4714-2A

Abstract: Lumber was sawn from 150 suppressed-growth ponderosa pine trees, 6 to 16 inches in diameter, harvested near Flagstaff, Arizona. This paper presents grade recover and properties for dry 2 by 4's sawn from the logs and graded by a variety of structural grading systems. Flexural properties met or exceeded those listed in the National Design Specification. When graded as Light Framing 43 percent of the 2 by 4's made Standard and Better and as Structural Light Framing, 34 percent made No. 2 and better. Warp was the biggest factor limiting grade yield. About 7 percent of the lumber would make a machine stress-rated (MSR) lumber grade of 1450f, but with no established market such production is not recommended. If graded as laminating stock, about 8 percent of the lumber qualified as L3 or better. A comparison of the results from this study with those from a companion study indicates that appearance grades offer the highest value alternative for lumber produced from this resource.

Keywords: Wood, Arizona, ponderosa pine, utilization, mechanical properties, lumber, flexure, elasticity, bending, grading, smallwood, small timbers, ponderosa pine, strength, thinnings, suppressed growth, small-diameter timber, bending strength, structural timbers

File size: 230 kb(s)

This publication is also viewable on Treesearch:  view
RITS Product ID: 1507

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