Deck Hangers Attached directly to Rim Board
Deck Hangers Attached directly to Rim Board
(OP)
I saw this condition on a recent site visit where the contractor nailed the deck joist hangers thru the exterior OSB sheathing into the LSL rim board. They did not install the 2x ledger with lag screws per the plans. I understand there are issues with flashing and lateral pullout design has been addressed by steel beam tie backs as part of the architectural design. My question concerns the joist attachment itself. From a load transfer standpoint I'm not sure I see a problem as the rim board ultimately gets the load anyway, be it from the ledger or directly from the joist. I see reference to the ledger board all through the code but is it specifically prohibited to not have the ledger?






RE: Deck Hangers Attached directly to Rim Board
RE: Deck Hangers Attached directly to Rim Board
RE: Deck Hangers Attached directly to Rim Board
As I understand the code, for a prescriptive design (ie not engineered) a ledger board would be required and would need to be fastened with the code listed fasteners. However, if you can demonstrate that the connections to the rim joist are adequate, then you should be good. I'm skeptical that the contractor can achieve a decent flashing job with that arrangement.
Regards,
DB
RE: Deck Hangers Attached directly to Rim Board
Need direction??
RE: Deck Hangers Attached directly to Rim Board
Also, fundamentally, failure to follow plans and specs is a building code violation under the IBC
RE: Deck Hangers Attached directly to Rim Board
Lag screws are not allowed in our area. Does the IBC allow those?
RE: Deck Hangers Attached directly to Rim Board
Hi XR250 - where are you located?
regards,
Dan T
RE: Deck Hangers Attached directly to Rim Board
Why are lag screws/bolts not allowed in your area?
RE: Deck Hangers Attached directly to Rim Board
The reason I asked was that the original post said, "They did not install the 2x ledger with lag screws per the plans"
I believe they do not allow lags as anything larger than 3/8" technically cannot be used in a 1 1/2" band as their is a 4D min. requirement by the NDS.
Also, apparently, there has been some failures throughout the nation with bans attached with lags.
I typically just use structural screws now if I can't get a thru bolt in there.
RE: Deck Hangers Attached directly to Rim Board
Given that, if you do not have a ledger and you are fastening the hangers through the flush side of OSB and into the LVL, I would check the nail capacity; however, as others have noted...this is a flashing issue that will come back to haunt everyone involved, you included, when (not if) the attachment fails from water intrusion issues.
As a professional you have a duty to bring such things to the attention of those who can decide on such matters. You have two things to point....a code violation for not following plans/specs and a flashing issue that violates Chapter 14 of the IBC (another code violation), assuming you are using the IBC. If not, there are comparable flashing requirements in other similar codes.
RE: Deck Hangers Attached directly to Rim Board
If the band is a 2x10 or 2x12 and is 1 1/2" thick, how does that not violate the NDS's 4d min. penetration requirement for lags larger than 3/8"ø?
RE: Deck Hangers Attached directly to Rim Board
The penetration to which you refer is into the LVL, not the ledger.
RE: Deck Hangers Attached directly to Rim Board
RE: Deck Hangers Attached directly to Rim Board
RE: Deck Hangers Attached directly to Rim Board
Mike McCann, PE, SE (WA)