November 2007
Shrinking joists; ICC-ES reports
First 100 Words:
QUESTION & ANSWER Shrinking Joists Q We have a problem with ACQ-treated southern pine joists shrinking unequally — sometimes with differences as great as 1/2 inch. The narrower joists then create a swale by pulling down the composite decking. We crown the joists before installation and check them to be sure they're in one plane before decking. Do you have any suggestions? What about steel joists? A Andy Engel, editor of Professional Deck Builder, responds: In the 25 years that I've used southern pine joists, this problem has occurred more than once. Southern pine is strong and takes preservative treatment
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