About Us

What is WIJMA?

The Wood I-Joist Manufacturers Association (WIJMA) is a non-profit organization that represents major producers engaged in the manufacture of prefabricated wood I-joists and structural composite lumber (SCL). The purpose of WIJMA is to provide technical assistance and information to the residential and commercial construction industries and to engage in activities that enhance and increase the use of prefabricated wood I-joists and structural composite lumber in the construction industry. WIJMA membership is open to and comprised of technical representatives of prefabricated wood I-joist and SCL producers.

Meetings are generally held twice a year in conjunction with the ASTM-D07 meetings. To address specific issues, WIJMA forms tasks groups comprised of representatives of producer and associate members.



Producer Members

Any business entity engaged in the manufacture of prefabricated wood I-joists or structural composite lumber is eligible to become a member of the association. WIJMA is not staffed. Rather, technical representatives of each producer member periodically meet to discuss and address engineering principles, quality control practices, codes, standards, and industry activities. Each producer member pays annual dues and carries equal voting status.


For more information about our producer members and their respective product lines, please click on the links below. See also our Contact page.

To become a member, contact Jeff Stefani at (513) 624-7999 or email jstefani@anthonyforest.com.

Associate Members

Any entity engaged in a business or service allied with the prefabricated wood I-joist industry or supportive of it may be an associate member. There are approximately 25 organizations that are currently listed as associate members. At the present time, associate membership is free.



WIJMA’s executive board is made up of a President, a Vice President, and a Secretary/Treasurer. Each officer serves a two-year term and is a representative of one of the producer members.

Office Officer Affiliation
President Heather Strong RedBuilt, LLC
Vice President Jeff Stefani Anthony-Eacom
Secretary/Treasurer Robert Taylor Boise Cascade