DEL2000
Structural
- May 10, 2004
- 48
In ACI 318-02, section 18.3.3, it defines the different classifications of PT Slabs, with type U being the typical uncracked PT slab with the tension stress limit equal to 7.5 (f'c^0.5) (which is increased from the 1999 and earlier codes which put the limit at 6 (f'c^0.5)). At the bottom of that section of the code, it says that all two way slabs should be designed to Class U.
In the new ACI 318-05, they still have class U with a tension limit of 7.5, but the words at the bottom of section 18.3.3 says that all 2 way slabs should be designed as Class U with tension stresses limited to 6.
The problem I have is that I am using software that is tailored to the ACI 318-02 code, but we don't want to go to the 7.5 limit since it seems like a mistake in the 02 code. Anybody run across this code issue? Is the 02 code a mistake that has been corrected with some erratta? Or did they just rethink the tension stress limits?
In the new ACI 318-05, they still have class U with a tension limit of 7.5, but the words at the bottom of section 18.3.3 says that all 2 way slabs should be designed as Class U with tension stresses limited to 6.
The problem I have is that I am using software that is tailored to the ACI 318-02 code, but we don't want to go to the 7.5 limit since it seems like a mistake in the 02 code. Anybody run across this code issue? Is the 02 code a mistake that has been corrected with some erratta? Or did they just rethink the tension stress limits?