|Wood Committee Is Developing Quality Standard for Oriented Strand Board
Oriented strand board (OSB) panels are produced with wood strands and adhesives and commonly used in residential construction.
A task group of ASTM Subcommittee D07.03 on Panel Products is drafting a Practice for Establishing Allowable Design Capacities for Oriented Strand Board (OSB) Wood-Based Structural-Use Panels, to establish allowable design values and set a standard of quality for the expanding use of OSB panels in commercial construction, roof sheathing, furniture, and other applications. Design capacities determined in accordance with this standard practice will provide the basis for specification of panels for applications other than residential such as industrial and light commercial, says task group chairman Tom Cunningham, Ph.D., director of Technical Services, Engineered Woods Division, J. M. Huber Corporation, Charlotte, N.C.
The task group is developing the standard through the voluntary consensus of members of ASTM Committee D07 on Wood. Design capacities are required by structural engineers, architects, and general specifiers to select products on the basis of the application and design loads, says Cunningham. It is important to design professionals that design capacities be consensus-based.
In the proposed standards scope, the task group describes provisions that establish design capacities on the basis of a common set of calculation procedures.
This standard practice is based on ICBO [International Conference of Building Officials] Evaluation Service acceptance criteria AC-182, Acceptance Criteria for Wood-based Structural-use Panels, says Cunningham. The scope of ICBO ES AC-182 is limited to proprietary panel products. [The task group] is expanding the scope and provisions of AC-182 to provide consistent and consensus-based procedures for developing design capacities for wood-based structural-use panel products, both commodity and proprietary.
The draft standard is currently on ballot as Work Item 167. It refers to structural-use panels that comply with U.S. Department of Commerce Standard PS-2-03. Panels are designated by span rating and thickness for sheathing panels (including structural 1 sheathing) in span ratings of 24/0, 24/16, 32/16, 40/20 and 48/24 and single floor panels in span ratings of 16 oc (maximum on center support spacing for single-layer floor applications), 20 oc, 24 oc, 32 oc and 48 oc.
For further technical information, contact Cunningham at the J. M. Huber Corporation, Charlotte, N.C. (phone: 706/336-3129). Committee D07 meets April 13-15, 2004, in Corvallis, Ore. For meeting or membership details, contact Jeff Adkins, manager, Technical Committee Operations, ASTM International (phone: 610/832-9737). //
Copyright 2003, ASTM