We are investigating some post-tensioned beams that are failing the torsion checks (due to ACI 318-11 Eqn 11-18). Under the torsion design options, there is 'Beam', 'As Shear', 'As Bending', and 'Wood Armer'. In the manual, you are clear on not using…

Hello. I have a 2-way flat slab with a banded/uniform PT layout. Around my elevator and stair openings, we have beams framing the openings. My question is in regards to failures resulting from higher than expected values of torsion in these beams …