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Were the hangers secured to the I-joist as well as to the lam? What’s the depth, span, and spacing of the joists? We have this exact product and system, except for hangers top-welded to a steel I-beam, with no noise. Are the joists resting shy of the lam, or do their ends squeeze right up against it? As long as there’s the recommended 1/8″ (if memory serves) space be/t the end of the joist and the side of the lam, it’s hard to imagine what could be rubbing against what to cause a squeek. (Maybe a mouse is caught in there!?) I’d definitely investigate before applying the subfloor, cause you might have limited access afterwards.
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Were the hangers secured to the I-joist as well as to the lam? What's the depth, span, and spacing of the joists? We have this exact product and system, except for hangers top-welded to a steel I-beam, with no noise. Are the joists resting shy of the lam, or do their ends squeeze right up against it? As long as there's the recommended 1/8" (if memory serves) space be/t the end of the joist and the side of the lam, it's hard to imagine what could be rubbing against what to cause a squeek. (Maybe a mouse is caught in there!?) I'd definitely investigate before applying the subfloor, cause you might have limited access afterwards.
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I am in the process of rolling some 113/4 in. tji's hung from paralams and I always cut them a 1/4" shy so they don't rub against the paralam and always always glue the bottom of the hanger before setting the joist. It works for me.
*Ted, I once had a weird situation with squeky joist hangers. We were using regular wood; remember that stuff?!anyways, I also thought that the extra weight would silence them. It didn't.It turns out that it was an out of line floor system. One set of joist was slightly held up out of the hangers by a wall that they cantilevered over.So, my suggestion is to check the plane of the entire system carefully.Glue is not the answer in the long run. WD40 will quiet them too, but what about next year?blue
*Had the same problem with a few the first time I used them a couple years ago. The fix Truss Joist MacMillan's field guy gave me was to shoot a screw through the bottom of the hanger into the tji. Worked like a charm. He also recommended using a shot of construction adhesive or silicone into the bottom of the hanger in the future even though it wasnt in their installation specs at the time. The hangers I used had a hole in the bottom to shoot the screw through.JonC
*Thanks everyone for the great suggestions. Unfortunately the joist are already all nailed in so I can't try the glue, or silicon at the bottom of the hanger, but the screw in the hole at the bottom of the hanger sounds like a good option. I've always hated hangers whether in nominal lumber or the engineered stuff, but with all the siesmic engineering out here in CA there's no getting around them. Thanks again for the help.
*Jon, 'Zactly!Mongo
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I just rolled a house full of truss joist many of which were hung with top flange hangers on paralams. The hangers were those specified for these joist, but I'm getting a fair amount of squeeking when I walk on the joist. Perhaps this will resolve when I lay the plywood subfloor and maybe the fact that the floor gets 1.5 inches of gypcrete for the radiant heating system will take care of the noise. It's a bit of an embarrasing situation since the truss joist are boldly stamped with the Silent Floor logo. Any suggestions as to prevention and cure of the squeeks? Thanks.
*I've noticed several guys here suggest using glue in the hangers to prevent this. Maybe one of them will step in with some more specific details. You might also contact you supplier and see if they have any suggestions.