Tensile cracking limits in Class T post-tensioned beams
Tensile cracking limits in Class T post-tensioned beams
(OP)
I"m doing my first PT beam designs since the creation of Class T, and the increased limits on allowable tension. In going through the example in the ADAPT manual, they set the beam limits to 9 /f'c. I was going to use the full 12 /f'c, but now I'm wondering. Is there some reason to hold the limit to 9?






RE: Tensile cracking limits in Class T post-tensioned beams
Class T is a real worry. They say it is cracked. But there is no requirement for crack control or bonded reinforcement. For any design with stresses above class U and possibly from about half of the class U limit, there should be a requirement for minimum bonded reinforcement at the tension face and at a maximum of about 12 - 15" centres.
RE: Tensile cracking limits in Class T post-tensioned beams
RE: Tensile cracking limits in Class T post-tensioned beams
The "options" are simply meaningless limits. You can now put a name on something that is completely meaningless.
And they got the class T limit wrong. Bonded reinforcement is required to control cracking well below this limit!