1. Member, ASCE
2. Assoc. Prof., Dept. of Wood Sci., The Univ. of British Columbia, #4041-2424 Main Mall, Vancouver, British Columbia, Canada V6T 1Z4. E-mail: franklam@interchange.ubc.ca
3. Corporate Tech. Dir., Trus Joist MacMillan Ltd., 1272 Derwent Way, Annacis Island, British Columbia, Canada, V3M 5R1.