IRG. International Research Group on Wood Protection
- Sweden. Independent international group of scientists, facilitating contacts between specialists working on the complex problems of wood protection and durability. Library of articles and publications. Links to related sites.
- http://www.irg-wp.com/

IRA. Intermountain Roundwood Association
- USA. Non-profit trade organization, representing the economic and educational interests of harvesters, producers and marketers of roundwood and associated products, materials and supplies. Searchable directory of member companies and products. Links to re
- http://www.intermountainroundwood.org/

AWPA . The American Wood Preservers' Association
- USA. International, nonprofit technical organization founded in 1904 to provide a common forum for the exchange of information for all segments of the wood preservation industry, and for promulgating voluntary wood preservation standards. List of develope
- http://www.awpa.com/

American Institute of Timber Construction
- Representing the glued laminated timber industry since 1952, AITC provides technical support to manufacturers and design communities.
- http://www.aitc-glulam.org/

Northwestern Lumber Association
- Represents professional retailers and suppliers of the lumber and building material industry. Creates business aids and merchandise, education opportunities, publications and lobbying at the state and federal levels.
- http://www.nlassn.org/

Hardwood Information Center
- Information about buying, decorating with and caring for solid hardwood flooring, furniture, cabinetry and millwork; from the Hardwood Manufacturers Association.
- http://www.hardwood.org

Wood Products Council
- Joint site for wood products information sponsored by American Wood Council, APA-The Engineered Wood Association, Architectural Woodwork Institute, Canadian Wood Council, Composite Panel Association, Southern Forest Products Association and Western Wood P
- http://www.woodinfo.org

The World of Engineered Wood
- Home page of the Composite Panel Association and the Composite Wood Council, representing the particleboard and medium density fiberboard (MDF) industries, and related products.
- http://www.pbmdf.com

Corrugated Polyethylene Pipe Assoc.
- Organization of manufacturers, suppliers, and allied businesses, dedicated to providing accurate information which addresses key issues such as strength and structural integrity, service life and long term performance, proper installation and material c
- http://www.cppa-info.org/

Wood Moulding & Millwork Producers Association
- International non-profit trade association promoting the use of wood mouldings, millwork, and lumber.
- http://wmmpa.com

Woodworking Machinery Suppliers Association
- UK trade association representing suppliers of woodworking machinery - both engaged in manufacture and import of products.
- http://www.wmsa.org.uk/