We are involved in a kitchen remodel. 2nd floor joists (ceiling above kitchen) are 14″ trusses (24′ span 19.2 oc) bottom chord bearing. We want to blow out 16′ of exterior wall that the trusses bear on. Archy’s initial plan called for 8″ steel beam to span the 16′ and support the 2nd floor joists. We’d like to aviod dropping a beam below the ceiling plane and recess a beam into the ceiling…My question is: Can the trusses be supported with a joist type hanger attached to an appropriately sized lvl beam?
Coz
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My answer is, Maybe.
Some web trusses for floors can only be used the way they are configured for and some have optional installations. My guess is that you can, but you need to clear it with the manufacturers.
BTW, that is going to be a pretty substantial LVL for that knind of span and load. Off the top of my head, I'm guessing 3- 1-3/4" x 18". is this a 2x6 wall? Don't forget you'll be needing plenty of jacks under each end too.
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Thanks, good point on the size of the lvl, I hadn't thought it through that far. We can break up the span with a column that lands at the end of cabinet pennisula, reducing the longest span to 10'.
Coz
yeah, when you said "appropriate sized LVL" or whatever, I suspected you were taking a group shot at ducks on the water instead of sighting a particular one on the wing
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Even with a recessed beam I'd think steel may be a better choice. Last LVL beam I did was around 6 x 16 for a 16 foot span. Will depend on the loads of course. Every inch you cut from the depth to try and make it fit in the ceiling adds a lot to the thickness. But, if you try a flush beam the ends of the trusses will probably have to get trimmed. That may be a total no-go.
It doesn't matter to a floor truss that's bottom chord bearing if it sits in a hanger or sits on a wall. (Piffin, I'm afraid you're wrong on this one)
My concern is more like WHERE is the beam going to go? If this is an exterior wall, and you want to hang the floor trusses, are you going to have to cut the ends off?
If that's the case, the truss manufacturer needs to design a repair for the trusses - You can't just cut the ends off. The repair will likely call for plywood on both sides, with glue and screws.
The truss manufacturer should have some 3.5" wide hangers, also. Lumberyards around here don't carry them.
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OK, I'm partly wrong ( what's that now, five times?)
He did define these aas bottom chord bearing, but I can get trmmable web trusses where the ends have a solid blocking at the ends to allow for cutting. That is part of the maybe I had in mind. It would also depend on whether, once he gets the new beam in place, if he can be able to seat and nail top hanging hardware to seat them on.
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Not sure why you're bring up "top hanging hardware". We stock face mount stuff that would work fine.
The trimmable end trusses are a fairly new thing. I'd be surprised if he was dealing with those.Clarke's Second Law: But the only way of discovering the limits of the possible is to venture a little way past them into the impossible.
I guess because that is what was always speced to me when using these. I guess I had the impression that was all that wa acceptable with them.
just all goes to show how many variables there are and how dangerous it is to do this engineering online without see the whole job and specing the total package.
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