[mhays]

I've heard that post-tensioned concrete might be the worst scenario for a potential light well. Each floorplate will have a tight pattern of cables that pull it all together in tension, creating a slight upward bow and allowing thinner and lighter slabs. Cutting the cable can be catastrophic, and it's apparently not very feasible to only cut part of it out while keeping tension. Can any engineers or superintendents weigh in?

Otherwise, I understand that light wells are tough but can often be done if augmented with new structure, and presumably life safety...