The photos above, sent in by a JLC reader, show great
examples of how not to frame a roof with wood I-joists. The
bottom flange of the I-joist — the part that is most
critical for carrying the bending forces — has no
bearing, either at the top or the bottom.It will not take a large load for this roof to fail.
What will the failure look like? Most likely, at the upper end
the I-joist webs will tear away from the top flanges. At the
bottom end, the webs will split and the roof will come
down.
Sources of Supply
Wood
I-Joists |
Boise-Cascade
P.O. Box 2400
White City, OR 97503
800/232-0788 | Trus Joist MacMillan
P.O. Box 60
Boise, ID 83707
800/628-3997 |
Georgia-Pacific
2300 Windy Ridge Pkwy.
Atlanta, GA 30339
800/423-2408 | Willamette Industries
2550 Progress Way
Woodburn, OR 97071
800/942-9927 |
Louisiana-Pacific
325 Industrial Dr.
Fernley, NV 89408
800/223-5647 |
|
Hangers and Connectors |
Simpson Strong-Tie
4637 Chabot Dr., Suite 200
Pleasanton, CA 94588
800/999-5099 | United Steel Products
(USP, Kant-Sag, Silver)
P.O. Box 80
Montgomery, MN 56069
800/328-5934, ext. 235 |