Sill Plate Anchor Bolts

[ChipB]

I am designing a cmu basement wall that has a retained soil height of 11'-4" (12'-0" overall). It is restrained at the top by the first floor framing, and at the basement by a concrete slab.

Ok here is the problem, the sill plate (southern yellow pine) at the top of the wall needs to transfer 700#/ft into the floor. The floor framing is perpendicular to and bears on the plate. I can reasonably get the sill plate connected to the floor framing for the required transfer of the force. Please tell me I don't need 5/8" dia. anchor bolts spaced @ 8" o.c. to transfer the load into the plate. Is there a reference I can use besides NDS? The contractor will hunt me down and kill me if I call that out .

 

[boo1]

Are you considering the frictional forces?
Why not use beam/s to transfer the lateral loads?

 

[baritone6foot4]

Hopefully you've provided reinforcement for the CMU wall and the floor system at the top is designed as a diaphram to take the lateral load.

Unfortunately, the older model codes (CABO, BOCA, UBC, SBCCI) and the newest model residential code (IRC) require the use of anchor bolts for securing your sill plate to the CMU wall.

I've seen anchor bolts, anchor straps, expansion bolts, power driven fasteners, epoxies and even bent-over rebar in my years of building inspection.

Check with your local building official, especially if you are in an area with any seismic activity.