temperature reinforcement left out

[SperlingPE]

I have a one way pan joist floor. Typical bay sizes 24'x24'. 30" pans, 4 3/4" slab, 16" deep stems. The temperature steel was left out in the middle third of the bay. Shrinkage cracks have occured where the temperature steel stopped. My question is: Does the temperature steel serve any other purpose other than crack control? Does it assist in transferring load to the concrete joists from the slabs? If the temperature steel serves purpose other than crack control, what can be done to get steel into the areas where there is no temperature steel?

 

[dik]

Basically crack control... but it does help distribute loads a bit. If a one-way pan system, the amount of load transfer will be small due to the orthotropic construction. The 4-1/2&quot; slab should readily span the 30&quot; unless there are some exceptional point loads. If the cracks have developed, it's a little late to sawcut <G>... you may want to epoxy inject them or fill them with something suitable.

 

[jheidt2543]

Is this an &quot;outside&quot; floor where you will actually get temperture fluctuations and subject to a wet enviornment, like a parking deck or is it an interior floor slab? Your repair choices depend on the answer.

In my opinion, an exterior slab would require the epoxy injection of the cracks or an epoxy topping to prevent deterioration of the slab and remaining rebar. If interior, then it is not so critical and perhaps a floor coating would be adequate, since it would be more of an aesthetic problem.

 

[SperlingPE]

Nobody has an issue with strength and load transfer? This is purely an aesthetic or possible functioning problem? I have run numbers on the slab as an unreinforced structural concrete beam and it makes the required loads for the floor. 100 psf floor live load and 1 kip (spread over 2.5 ft^2) concentrated load per IBC 2000 were the required loads.