Post Tension Cable Slab Foundation

Cables are arranged as indicated by the engineer and chaired to run through the center of the slab.

Post tension cable slab foundation.

Errors that lead to cracks in post tensioned slabs. The home builders theory is that they can achieve a minimum of 50 psi pounds per square inch compression throughout the slab and most importantly at the middle of the. Flexural cracks develop when. A post tension slab is a concrete slab that has steel cables running through it that have been placed under 33 000 pounds of tension.

Construction of post tensioned slabs on grade is very similar to using reinforcing steel except for the tensioning step. Many modern homes are built on post tension slab concrete. Post tensioned slabs are thinner and lighter which have trickle down effects on the both the building gravity and lateral force resisting systems including columns shear walls and foundations. As a result it s best to construct a post tensioned slab giving the slab the strength to resist stresses caused by the soil.

When errors are made on site during the post tensioning process the ability of the reinforcement to prevent cracking is decreased. Post tension services of texas ptst is a full service post tension company based in dallas. A primer a basic concept to understand is that concrete is strong in compression and weak in tension. For residential construction tendons at 48 inches on center are common.

The first edition of the post tensioning manual was published in 1972 and as of the time of this writing 2018 they are up to their 6th edition. Foundation repair of post tension foundation including cables. This tension makes the concrete slab and foundation much stronger than concrete without reinforcement and helps reduce cracking. We specialize in elevated and slab on grade post tensioning and post tension repair work for both commercial and residential applications in dallas fort worth arlington keller plano mansfield and throughout the dfw metroplex texas oklahoma colorado louisiana and new mexico.

A post tensioned foundation is a concrete slab foundation that is reinforced with stranded steel cables that are tensioned after. The post tensioning institute designed post tensioned foundations. Campbell the post tension cable system for concrete slab foundations that has and is replacing the standard steel rebar system has a fundamental flaw.