PT Repair and Replacement is the only option for PT cables that were identified as damaged during the post-tension evaluation process. The repair includes the replacement of entire deteriorated strands, the replacement and coupling of portions of strands, and anchorage repairs.

How much do post tension cables cost?

The cost for post tension cables is estimated at $1.65 per pound.

What happens if post tension cable breaks?

Once tensioned, the cables cannot be de-tensioned. If a slab is post tensioned there will be a hole in the foundation or slab that contains a cable end.

Can you fix a post tension slab?

Post-Tension Foundation slabs can be efficiently repaired and retro-fitted. While most of our calls are after someone has already broken a PT cable, we can help eliminate major damage to the slab and tendons with locating tendons and a review of the repair conditions, prior to cutting into the PT slab.

How do you fix exposed post-tension cable?

Post-Tension Slab Cable Repairs

To repair, purchase some concrete patch from the hardware store. Using a putty knife or a hand trowel to apply the concrete patch to the exposed cable end. “Trick of the trade” wiping the surface off with a damp sponge will remove excess silicone and leave a smooth finish.

Do post-tension slabs crack?

Cracks more often occur during curing because the concrete generates heat and expands during the chemical process and shrinks as it cools. Because there is not yet tension on the tendon cables there is no reinforcement to hold the foundation together and cracks often occur during this period of time.

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.

What is the difference between normal slab and PT slab?

ØNormal slab is reinforced concrete(RCC) structural element whereas post-tension slab is per-stressed concrete (PSC) structure. ØThe slab which is supported with Beams and columns is called conventional slab.

What do post-tension cables do?

Post–tension cables are used in concrete construction to allow thinner slabs and greater span lengths between support columns. These cables, composed of steel wires inserted into a plastic sheath, are subsequently “tensioned” and grouted after the concrete is poured.

How deep are residential post tension cables?

For residential construction, tendons at 48 inches on center are common. Commercial foundations will have much more steel.

How long does post tension cables last?

Conventional concrete & rebar foundations last about 20-30 years before failure begins to occur. Post-tension slabs are lasting about 15-20 years and are failing at a much higher rate. Post-tension slabs are created with concrete trenches around the perimeter of the house where the external walls will be placed.

How deep are post tension cables?

The plan maps show the rebar at 3″ depth, and the post-tension cables at 8″ depth. Discerning a post-tension cable from rebar generally requires scanning a larger area to properly understand the layout of structural elements in a slab. When in doubt, mark it out and avoid it!

What happens if you drill into a post tension slab?

Post-tension slab drilling, cutting, and coring can be incredibly dangerous. Not only is there a risk of structural collapse, but you also risk severe injury and death. It’s definitely NOT something you want to play around with.

What is post tension repair?

Post-Tensioned (PT) Concrete Structure Repair & Maintenance Services. Post-tensioning (PT) is one of the most advanced and efficient technologies used to reinforce concrete.

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. Older homes with post tension slabs may have a plastic or paper sign fastened to the wall.

What is a post tensioned concrete slab?

Post-tension concrete slabs are used to create a monolithic (single pour) slab that is stronger than a traditional slab without reinforcement. This is achieved by laying out high-strength steel cables in a crisscrossed grid pattern throughout the foundation prior to pouring the concrete.