Plain Concrete Grade Wall - Slab Detail
Plain Concrete Grade Wall - Slab Detail
(OP)
Client would like to replace my 2' wide X 1' thick concrete footing and my 8" thick x 22" tall concrete grade wall with a solid rectangular plain concrete grade wall 2' wide x 34" tall. They would also like to try to pour the slab at the same time and use bent dowels at the slab to grade wall transition.
I am not so concerened about the grade wall as there is virtually no load on it because of the metal wall sheeting above and it is serving mainly as a frost break but I am concerened about the transition to the slab and it being one continuous pour. Even with the dowels I am concerned about cracking as the slab wants to shrink and is restrained by the grade wall.
Has anyone used a detail like this and have any thoughts or recommendations?
Thanks!
I am not so concerened about the grade wall as there is virtually no load on it because of the metal wall sheeting above and it is serving mainly as a frost break but I am concerened about the transition to the slab and it being one continuous pour. Even with the dowels I am concerned about cracking as the slab wants to shrink and is restrained by the grade wall.
Has anyone used a detail like this and have any thoughts or recommendations?
Thanks!






RE: Plain Concrete Grade Wall - Slab Detail
RE: Plain Concrete Grade Wall - Slab Detail
RE: Plain Concrete Grade Wall - Slab Detail
RE: Plain Concrete Grade Wall - Slab Detail
RE: Plain Concrete Grade Wall - Slab Detail
RE: Plain Concrete Grade Wall - Slab Detail
Suggest rather than just a cold joint, a layer or two of plastic would help to allow the slab to slide and reduce restraint cracking. However, if it is necessary to provide tiedown to the footing, crack control would be a secondary consideration.
RE: Plain Concrete Grade Wall - Slab Detail
RE: Plain Concrete Grade Wall - Slab Detail
Personally, I would limit possible water intrusion at the exterior here by setting the edge of the slab in by the width of the exterior wall above. This will require extra formwork. Otherwise, depending on your locale, you could be looking at frost heave between the bottom of the slab and the strip footing. Just a thought...
Mike McCann
MMC Engineering
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