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IWPA Grading Rules


The International Wood Products Association has helped to establish grading rules when there is a need identified internationally. International grading rules and standards listed below are voluntary standards that can assist in the importing wood products. 


Voluntary Grading Rules for Lauan Doorskins 

Jointly developed by IWPA, NWMA (National Woodwork Manufacturers Association) and TPMEA (Taiwan Plywood Manufacturers & Exporters Association).  8pp: Last revised, 1981.



Imported Rotary Cut Veneer & Platforms Standards 

Standards jointly adopted by the IWPA Lumber Products Committee, The Malaysian Timber Industry Board, and the Malaysian Wood Moulding Council to establish quality levels for premium, standard and utility grades. Pdf only (or duplicate copies). 44pp. Last revised, 1987.




Tropical Hardwood Machined Lumber Products Grading Rules
This newest standard, adopted April 2010, describes the grades made from various wood species. The Standard contains quality criteria; provisions for packing; and definitions. It is intended for voluntary use by North American buyers, distributors, architects, and world suppliers of wood veneer products and platforms. Requirements are described for wood species; veneer types, grades and sizes; sanding; and finishing. A glossary of trade terms is provided for better communication and understanding, and provisions are included for crate and panel marking to indicate compliance with this Product Standard. 21 pp.

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