need help deciding between expansion joints or relief cuts
need help deciding between expansion joints or relief cuts
(OP)
I am pouring a monolythic floor with a 4" slab floor that will be 24'x40' and I have only used expansion joints in previous slabs but have been told to cut in control joints instead, I am not familiar with this as all of my jobs have been small home projects. any suggestion?






RE: need help deciding between expansion joints or relief cuts
For crack contol in a slab you can either saw in a control joint about 1/3 of the depth or have a joint tooled.
If it is a pavement, you may widh to install a "dowel box" or similar to transfer shear. Doubtful with a 4" slab.
Depending on the use of the slab, I would cut the 12' width in half and the 40' length in thirds if I was using WWF.
RE: need help deciding between expansion joints or relief cuts
RE: need help deciding between expansion joints or relief cuts
This slab is tiny and I agree that an expansion joint would be overkill.
To put things into perspective, in industrial slabs, we used to put sawn joints at maximum 30' centers and expansion joints (or similar) at 60 to 100' centers.
In your situation I would put the sawn joints much closer.
csd
RE: need help deciding between expansion joints or relief cuts
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RE: need help deciding between expansion joints or relief cuts
What stops the foundation walls moving inwards under soil loads then?
csd