ITW Building Components Division
 https://alpineitw.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/

Standard Details
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Why Trusses?
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Roof Trusses | Best Way to Frame

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Nordic I-Joist

https://www.nordic.ca/en/products/nordic-i-joist