Looking for Detail for Raised Garage for Single Family Home

[xeneize10]

Good afternoon, I am designing a raised garage for a single family home. The framing will be light weight concrete over plywood over wood floor joist. The floor joist will be supported at one end by the footing and at one end by a girder. I was wondering if anyone had any standard details that could be shared. Thank you.

 

[SLTA]

Standard detail for which part?

Please remember: we're not all guys!

 

[xeneize10]

@SLTA: A cross-section indicating the connection of the lightweight concrete to the floor joist.

 

[SLTA]

I don't have a detail to share, but I could possibly help with discussion. Where is the house located? Have you confirmed that a raised garage on wood framing is acceptable per code? It's a big no-no where I live, as well as in the northern US where there's lots of snow.

Please remember: we're not all guys!

 

[jayrod12]

Definite no-no here as well, North of the 49.

That being said, whenever we do concrete topping on wood framing, there's no connection. It's poured directly against the sheathing and I haven't seen a case of de-bonding. Granted that is never subjected to car traffic.

I'm not sure how you would quantify it, but maybe driving a bunch of screws halfway into the joists would act like mini nelson studs.

 

[EngineeringEric]

Does it need to be tied together even? i can see so many things wrong with the system as a whole i don't see the need to make it composite

 

[msquared48]

I agree with jayrod in that the concrete just lays there over the plywood. No connection.

You are usually looking at 3/4" to 1.125" T&G plywood spanning no more than 12" to the joists.

Mike McCann, PE, SE (WA)