Slab and wall joints in concrete tank 1

[rholder98]

In a liquid-filled tank, must construction joints in the wall align with the construction joints in the slab? These are construction joints, not contraction joints--i.e., continuous reinforcement.

Specifically, this is for a circular tank, and according to the specs, the slab will be placed in six pie-shaped segments, so that the joints align with the joints in the walls, which are limited to 60 feet placement lengths. Why does it matter whether the joints align?

 

[civilperson]

Aesthetics only.

 

[JedClampett]

I would recommend lining them up. If you get a crack at the joint it might continue into the adjoining wall or slab and leak. It won't be a lot of leakage, and it will close up, but it will still be there.
I sometimes have more joints in the walls than slab (usually twice as many), but I still try to match them up where I can.