4 Questions to ask your Unbonded Post-Tension Supplier

Hiring a quality Unbonded Post-Tension Supplier can be the difference between a smooth construction project and a problematic situation. The Post-Tension (PT) supplier will play a key role in your reinforced concrete project. Therefore, general contractors and concrete contractors need to choose wisely.

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Traditionally, the Post-Tension Supplier is awarded their contract after other subcontractors in larger trades have been selected. Finding the right PT supplier to work with is essential to completing your concrete construction project on time and within budget.

Aside from checking whether the project has been bid per specifications, the following are some questions to ask PT suppliers before awarding the job:

What is your proposed pour sequence?

Unless the construction joints and pour numbers have been referenced on the structural drawings, a PT supplier will have to assume a pour sequence for bidding purposes. If you and your PT supplier had different pour sequences in mind, then time may be wasted in the shop drawing stage. It&#;s best to be on the same page prior to the contract award.

How many trucks (or deliveries) have you included in your proposal?

If your construction site has limited lay-down areas, then you may not want full truck-load deliveries from your PT Supplier. Your PT Supplier should provide the construction materials per your schedule, but it&#;s always good idea to let them know the plan.

What previous PT projects have has the PT Supplier worked on that are similar to this project?

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Whereas having the lowest price is important during bidding, but hiring a Post-Tensioning Supplier with the right expertise could help you avoid losing money during construction. There may be unique challenges in your construction project that need to be overcome in a timely and cost-effective manner. As with other construction trades, experience matters.

How many sets of stressing equipment will you provide and for how long?

Most PT specifications require at least 2 sets of stressing equipment at the construction site. If one set goes down, then having a backup set can help maintain the schedule. For larger projects with multiple crews, a contractor may require more than 2 sets. As with other rented equipment, the rental period may vary depending on the duration of the project.

&#; Neel Khosa, Vice President, AMSYSCO
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In the early fifties, post-tensioning systems for the prestressing of concrete were developed by specialists, such as VSL in Switzerland.

Even though post-tensioning is a mature technology, it is still a fantastic tool for the design engineer as it enables the active definition of the internal load path in concrete structures by superposing a favorable state for the internal stresses. This enables deformations to be minimized, helps reduce the thickness of members, reduces reinforcement congestion, facilitates segmental construction without the need for wet joints and allows the use of high-strength steel.

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