ITW Building Components Division
http://www.itwbcg.com/
SBCA
http://www.sbcindustry.com/
Encyclopedia of Trusses
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Simpson Strong Tie
http://www.strongtie.com/
Southern Pine Inspection Bureau
http://www.spib.org/
International Beams, Inc.
http://www.internationalbeams.com/
Standard Details
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Why Trusses?
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