How much does a post tension slab cost?
The cost of the post-tensioned slab is $30.52 per square foot which is approximately the average cost of the four floor systems. At the interior supports, a substantial amount of reinforcement was required for ultimate strength.
Is post tension slab more expensive?
Post-tensioned concrete will usually be more expensive for the home builder, due to the extra equipment needed. However, in large structures, post-tensioning can actually be less costly than conventional concrete slabs.
How deep is a post tension slab?
A residential post-tensioned concrete slab will typically be 8 inches thick and use 3000 psi concrete. Once the concrete has gained strength to 2000 psi, typically within the 3 to 10 days recommended by PTI, the tendons are stressed.
What is the benefit of a post tension slab?
It reduces or eliminates shrinkage cracking-therefore no joints, or fewer joints, are needed. Cracks that do form are held tightly together. It allows slabs and other structural members to be thinner. It allows us to build slabs on expansive or soft soils.
Is post tension slab better than rebar?
Post-tensioning, which is a form of prestressing, has several advantages over standard reinforcing steel (rebars): It reduces or eliminates shrinkage cracking-therefore no joints, or fewer joints, are needed. Cracks that do form are held tightly together. It allows slabs and other structural members to be thinner.
Why do post tension slabs crack?
Post-tensioned concrete slabs are typically expected to crack less than other slabs because post-tensioning produces a compressive stress that must be exceeded before enough tensile stress develops to cause cracking.
How do I know if my slab is post tension?
Most homes that have post tension slabs have a sign that is stamped into a concrete garage floor, often near the edge of the garage door right in plain sight. What is this? Older homes with post tension slabs may have a plastic or paper sign fastened to the wall.