Residential Wood Deck Brackets (Standoffs)
Residential Wood Deck Brackets (Standoffs)
(OP)
Has anyone used this product or similar? I have been asked by an architect to use this product and have not used anything like this before. It is essentially an aluminum 'I' with one flange bolted to the rim joist, the other flange attaches to a deck ledger. I see the benefit in waterproofing. The eccentricity worries me, it looks like I'd want a tension strap to a joist at every bracket to feel comfortable that I'm not going to roll the rim over. The company doesn't seem to have any engineering support - on their website they say that they recommend 6ft. to 8ft. spacings which seems excessive to me. Any experience with these?
http://deckbracket.com/
http://deckbracket.com/






RE: Residential Wood Deck Brackets (Standoffs)
I like that they've listed one of the features of this bracket as, "Frustrates insects".
RE: Residential Wood Deck Brackets (Standoffs)
RE: Residential Wood Deck Brackets (Standoffs)
RE: Residential Wood Deck Brackets (Standoffs)
RE: Residential Wood Deck Brackets (Standoffs)
RE: Residential Wood Deck Brackets (Standoffs)
Mike McCann
MMC Engineering
RE: Residential Wood Deck Brackets (Standoffs)
My thought was to strap the rim board to each joist. That way it didn't matter where the brackets end up. Assume the worse case where the bracket straddles a joints and design the ties for this tension. You probably should look at the case where the bracket falls in the middle of two joists. Will the torsion cause servicability issues with teh rim board??
The report does state a SYP or Douglas Fir (S.G. >0.50) was used. If you use a TJI Rim Board you'll have to determine if it is accepatable.
msquared48 mentions aluminum bolts. A structural aluminum bolt? We have always used stainless steel bolts with aluminum. It redues the dielectric action but doesn't eliminated it.
RE: Residential Wood Deck Brackets (Standoffs)
I was being a little facetious there on the bolts, but that is why I am always concerned with aluminum to steel connections.
And the detail I do not like at all. Supposedly, the torsion is taken out inside the house with the strapping, but there is nothing to take out the torsion of the connection of the deck member outside. There needs to be another strap at the bottom of each and every joist here too.
I would never use this product... Just does not feel right.
Mike McCann
MMC Engineering
RE: Residential Wood Deck Brackets (Standoffs)
I figured you were in regards to the bolts but this day an age there is always some new out there.
I didn't even look at the connection of the deck joists to the ledger board, but the same issue exists here! I guess that is why we carry the loads from the point of application to the foundation!
I am not convinced this connection is worth much either. It looks like a nightmare to install siding around. Standard ledger board, ice & water shield and flashing.
RE: Residential Wood Deck Brackets (Standoffs)
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Currently, the rim joist of the deck is seeing cross-grain bending without any tension ties. Classic...
Mike McCann
MMC Engineering
RE: Residential Wood Deck Brackets (Standoffs)
RE: Residential Wood Deck Brackets (Standoffs)
No. I was referring to moments induced by gravity forces. I was unaware of the additional strapping. That seems like an awful lot of extra hardware to justify the use of the bracket.
Lateral is quite another issue here. Is there a wood infill of the gap with an infill 2X nailer to the house to transfer the lateral shear?
Mike McCann
MMC Engineering
RE: Residential Wood Deck Brackets (Standoffs)
I can't actually believe it got ICC certified - what a joke! They will certify anything
"yes, the bracket can take the load as long as you can figure out how to deal with the torsion" - good luck.
Kind of like those "lite steel beams" they were peddling. Works great as long as you can keep them from twisting
RE: Residential Wood Deck Brackets (Standoffs)
1/2" hot dipped galvanized A307 grade A or SAE grade 2 bolts with 1" diameter flat washers are required.
The allowable load is multiplied by 0.4 for wet service.
RE: Residential Wood Deck Brackets (Standoffs)
I agree that it doesn't seem great which is why I was inquiring if anyone had used anything similar - although I can't say that I was quite as offended by the detail as some others on here, I've definitely seen worse.