CRACK CONTROL IN FOOTINGS
CRACK CONTROL IN FOOTINGS
(OP)
I am working on the design of a footing that has two way flexure. Do I have to check the footing for crack control?
Thanks,
Rob
Thanks,
Rob
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CRACK CONTROL IN FOOTINGS
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CRACK CONTROL IN FOOTINGSCRACK CONTROL IN FOOTINGS(OP)
I am working on the design of a footing that has two way flexure. Do I have to check the footing for crack control?
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RE: CRACK CONTROL IN FOOTINGS
Why would the footing crack? If shrinkage, how big is the footing?
What other reinforcing steel is in it (if any)
RE: CRACK CONTROL IN FOOTINGS
RE: CRACK CONTROL IN FOOTINGS
Crack control is not required for the base of concrete footings. I have even seen this requirement waived for concrete with at least 500mm of earth cover.
Regards
VOD
RE: CRACK CONTROL IN FOOTINGS
A "fringe benefit" for "typical" sized footings (like you are describing) is that cracking because of flexure is normally not a problem. Wise to check, however.
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RE: CRACK CONTROL IN FOOTINGS
RE: CRACK CONTROL IN FOOTINGS
Rob
RE: CRACK CONTROL IN FOOTINGS
Why would you have different reinforcement in each direction in a square 2 way flexural footing? It should be reinforced like a 2way slab! And as it is symmetrical, so should the reinforceemnt be.
Or am I mis-understanding where you are putting the shrinkage reinforcement.
You have not said what the exposure is. If the soil contains anything corrosive, then yes, I would be checking for crack control. In fact, I would probably do it anyway as it could possible be permanently wet.
houseguy,
It is a flexural footing. They crack because they are flexural reinforced concrete and bending and shear stresses are induced in them from the pressure from the soil.
RE: CRACK CONTROL IN FOOTINGS
RE: CRACK CONTROL IN FOOTINGS
The reinforcement is same in both directions. I missed a word "top" in my previous reply, #5 @ 12 is at the top for shrinkage.
RE: CRACK CONTROL IN FOOTINGS
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