Typical details for wood beam to steel post, with sheathing over?
Typical details for wood beam to steel post, with sheathing over?
(OP)
Hi, I am trying to figure out a detail for the condition mentioned in the title. Rim beam at wall with sheathing. Seems to me it would be a very common situation (anywhere you have steel posts in wood construction).
I could weld beam buckets to the column, but then the buckets/bolt heads intrude into sheathing space. I could let beam bucket into each side and screw it so it is behind the sheathing, but this seems like a small pain. I could do a fin plate, but then I don't get any bearing. I could do an upside-down T shape. I'd still need to slot the beam and countersink the bolts, but I think this might be the best option. Of course I still have the issue of ceiling sheathing over the bottom of the seat.
Is there a widely used detail for this, or is this just one of those things engineers don't think about and the contractor has to start chopping stuff up?
I could weld beam buckets to the column, but then the buckets/bolt heads intrude into sheathing space. I could let beam bucket into each side and screw it so it is behind the sheathing, but this seems like a small pain. I could do a fin plate, but then I don't get any bearing. I could do an upside-down T shape. I'd still need to slot the beam and countersink the bolts, but I think this might be the best option. Of course I still have the issue of ceiling sheathing over the bottom of the seat.
Is there a widely used detail for this, or is this just one of those things engineers don't think about and the contractor has to start chopping stuff up?






RE: Typical details for wood beam to steel post, with sheathing over?
RE: Typical details for wood beam to steel post, with sheathing over?
Edit:
I almost just wanna move that rim joist to the inside of the 2x6 wall, put the framing clips on the outside and block at panel edges.
RE: Typical details for wood beam to steel post, with sheathing over?
Dik
RE: Typical details for wood beam to steel post, with sheathing over?
RE: Typical details for wood beam to steel post, with sheathing over?
RE: Typical details for wood beam to steel post, with sheathing over?
Aahh, even better.
RE: Typical details for wood beam to steel post, with sheathing over?
RE: Typical details for wood beam to steel post, with sheathing over?
RE: Typical details for wood beam to steel post, with sheathing over?
I like the half-bucket approach. Easy to install the beam, too.
The client doesn't have infinite money but it is a pretty damn high-end project in SF, no one cares about a few extra bucks for a simpson hanger. We are using flush-mounted LVLs throughout with simpson hangers, and special moment frames as well. A simpson bucket isn't a worry. But are these thin enough to get sheathing over?
@bhiggins, when you say top plate do you mean the sill below the window? Will angle clips such as A35 T&B attached to the nailers not be sufficient? Or am I not imagining this correctly?
@dik, I think the bolts should be fine. They are located near the bottom eliminating upper-half shrinkage issues, and these are PSLs anyway which don't shrink like dimensional lumber (or so I've read). I'm using all engineered lumber for the floors and rim joists to reduce shrinkage in the existing shell. However, I am using dimensional lumber for the walls to match existing. My coworkers don't think the longitudinal shrinkage of new lumber will be enough to cause any issues. What do you think?
RE: Typical details for wood beam to steel post, with sheathing over?
Design your own hangers. These aren’t hangers for commercial sale by the thousands, so they shouldn’t need the same testing and vetting that Simpson and USP go through to get ICC approval, and tabulations for their catalogs. At the same time, you have their product as a pretty darn good starting point and something to work toward. Their hangers will most likely be 14 or 16ga., plus nail heads, gives you about 1/8" of total thickness beyond the face of the beam. You could make the hanger 1/8" narrower in width (their “W” dim.) and then cut 1/8" of beam width off the ext. face of the beam for about 2" at the top, to 3" of beam length at the bottom. Or, for the few places and sheets of sheathing where this will be an issue, use their hangers, and just put the sheet of sheathing up there and whack it a few times with a hammer, at the hanger side nails. Then with a hanger side shape template you can mark the sheathing off the nail indentations. Take a router and remove the inside face of the sheathing, 1/8" deep in the hanger area. Basically you can’t be nailing there or to the stl. post anyway. This is a fair amount of messing around, and expensive however you do it, but out there on high end houses, they just shrug their shoulders and move on. They are dapping stl. strapping, and the like, into the sheathing all over the place to take concentrated loads into the sheathing, etc.
RE: Typical details for wood beam to steel post, with sheathing over?
"For use on solid sawn wood members."
https://www.strongtie.com/facemounthangersssl_soli...
https://www.strongtie.com/products/connectors/wood...
RE: Typical details for wood beam to steel post, with sheathing over?
https://www.strongtie.com/facemounthangersijoist_i...
Here is the info for welded applications:
https://www.strongtie.com/products/lateral-systems...
@AaronMcD In regards to the thickness of the hanger of causing issues with sheathing I would just offset the hanger so the outside of the hanger is flush with the face of the HSS column. Also if you use the Simpson hangers be sure to check the Simpson technical bulletin: T-C-HUHUC-W to insure that the hanger is sufficient to carry the loads you are dealing with.