I haven’t asked a question here for some time. I’m hoping some of the truss experts are still hanging around… in particular, Boss Hog. Anyway…
I want to hang a freestanding, island range hood from a ceiling framed with 2×4 scissor trusses.
I haven’t asked a question here for some time. I’m hoping some of the truss experts are still hanging around… in particular, Boss Hog. Anyway…
I want to hang a freestanding, island range hood from a ceiling framed with 2×4 scissor trusses.
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Replies
About 15 years ago one of my kids did a Science Fair project on trusses. I sawed 1/4" X 1/8" pieces of hemlock for the trusses and we used pieces of cereal boxes glued on with hot melt as gussets. The trusses were about a foot long and 6 inches high. We built a roof assembly out of 6 of them spaced about 2 inches apart. We point loaded the ridge with a board then stacked concrete blocks on top. Imagine my surprise when these tiny trusses wouldn't break! We had 8 blocks stacked up and the roof wouldn't budge. So we stuck a hydraulic jack and scale on top of the pile and jacked against a roof beam. With the 8 blocks already there it took over 250 pounds of additional force to break those little bitty trusses! I'm sure you get my point. Your trusses won't even know your range hood is there.
Power to the truss!
snort
Not that it'll make a hill of beans difference, but florida shows how much a top loaded portion of a truss can handle. Pulling from the bottom cord would be a different force-tho I can't think enough to even crack the drywall.
If there was concern, you could run attachment members up to the top cord.
Or wait till Boss comes by and gives his blessing.
Hey cal!
I was pretty sure the trusses will hold it, and Boss did give me some tipsThe duct will be within 6" of a mending plate, and it'll hang about a foot from the ridge. If I can hang from the bottom chord, I'm sure the hood can!
With existing trusses nothing we say here (or what anyone short of the guy with the engineering stamp) means anything if it has to pass an inspection and they want the specs on the trusses so you'll have to get an engineer unless you have the original documentation for the trusses.
Having said that I'm surprised you're even asking the question - I'd just hang the range hood using good judgement as to how and where it's attached and be done with it. I've never heard of a large range hood being questioned for structural reasons.
Don, we have a very picky inspections dept. I've found that the more I know about what I want to build, the easier it is to get their approval. An ounce of prevention, beats going back to square one!