building brick walls on "propped" structure ? Now it cracks after de-propping

[lolobau]

Hi, I have some problem because the contractor was building brick walls on propped structure.
Now what happens after they "de-propped" the slabs, the bricks started to crack here and there.
How can I prove to the contractor that this was wrong? Obviously he is now arguing that why was he not supposed to build the brick walls on propped structure.
Where can I get some written proof that this is not allowed? Do the building regulates and codes mention it?

 

[Wallache]

That's some strange looking brick.

 

[Celt83]

Are these walls serving as support for those little roof insets? If so then they likely needed the shoring in place to continue the construction sequence so not sure how this could have been avoided in that case other than specifying they would need to wait to proceed until the slab reached specified strength.

 

[kipfoot]

To me, the additional small self weight deflection of the cantilever doesn't seem like enough to be the primary cause of the cracking. The cantilever end of the slab seems to be carrying load from the trough (or whatever) at the roof, too.

I'd be interested to know whether sufficient reinforcing is in the correct position in the cantilever slab. I can't see cracks in the slab in the photo, but it seems like there's more at issue than just the timing of the shoring removal.

If all the reinforcing is in place and you're satisfied that the structure has the capacity that it needs, then you can patch the cracks, right?

 

[dhengr]

Lolobau:
I second Wallache’s funny brick wall comment. It looks like your wall is pivoting on the left exterior window wall and conc. beam below, in your elevation view. The back span isn’t much longer than the canti. span, and it would appear that there is not enough rebar in the wall, at the door jambs, at the door head, or at the top of the wall. The wall is likely picking up a good share of the balcony slab loading too. Your wall is trying to act like a deep beam, but has not been properly designed, reinforced or supported. You may also want to check the concentrated reaction under your wall right at the ext. window wall.

(Edit) Also, it would be reasonable to assume that the canti. balcony slab and conc. beams below would be propped during the forming and pouring of your wall, and during its curing. Your wall and the slab below should be (should have been) properly tied together, bent tension rebars, etc. to tolerate this framing configuration. The forming joints don’t seem to make much sense, except as intentional stress raisers, or crack inducers.

 

[dik]

Was there any reinforcing in that wall? 2#5s around the opening or whatever?

Dik