Repour footings 1

[tommyanthony]

Hi, our builder poured the footings for a pair of three bedroomed two storey brick and block built houses on thursday. the trenches were 1300 and he poured 900mm of concrete but did not stake the corners out. the back left hand corner is 200mm lower than the front right hand corner and the bit in betwee tapers down from high to low.
He says it would be too time consuming to make it up with brick and block and to get around this he proposes repouring over what has already been poured, next weekend. this would be around another 300 or 400mm of concrete on top of the 900 already laid. Will this method be structurally sound or is it essential that it is all poured in one go.
any help on this would be greatly appreciated.

 

[Ron]

Depends on whether the structural engineer will allow. Depends on a lot of factors that we don't have information on here. This is done on occasion, but it looks like the contractor has a real problem with quality control and I'm not so sure I would trust him further.

Check with your local building official to see if his proposal is allowed. Get with the engineer who designed the structure. Why is your footing so thick?

 

[beton1]

A little more information. Is this in a frost prone area? I assume that you mean a 1300mm deep trench, how wide? What are the soils like? Often a footing/wall is trenched and poured to a certain depth (usually soil is clay or stable to allow this method of unshored trench), then the top foot or so is formed (dowels are placed in first pour). This method is not uncommon for industrial/commercial with no basements.These are houses; you may have a issue. To repair, you may have to drill and install dowels with epoxy, then set up good 'level' control as masonry or wood structure sits on this pour.