In Oklahoma, our soil has high clay content, so it expands and contracts easily with the weather. This is very difficult to do when stick framing a house, as opposed to truss framing, which typically places all roof and ceiling loads on the perimeter walls. This means there is a lot more flexibility when framing any ceiling and roof system. However, If it ends up cheaper due to less concrete and steel, why not do it? Tools | Contact, From: [emailprotected] endstream endobj 436 0 obj <>stream WebPost-Tensioned Versus Conventionally Reinforced Slab Foundations. These crackswill tighten when the cables are tensioned. Houston's source for independent, unbiased information about slab-on-ground foundations and foundation repair. Generally, the best foundation for heavy clay is a pier and grade beam Conventional concrete & rebar is used to determine the depth of the piers based on the weight of the structure In both cases the cable failed. Jared S. foundation. I appreciate how they are extremely personable, on-schedule, and always coming up with solutions. Scarification of existing soil, import of non-expansive fill, and Proudly powered by Visual Composer and WordPress, Questions Before Residential Tennis Court Installation, Part 2, Fall and Winter Tennis Court Care Tips, Part 1. I'm not a fan of PT slabs at all. Rebar and fill sand are used in a similar way as conventional foundation, but a post-tension foundation also includes steel cables that form a grid pattern across the entire slab. The one with a conventional slab I had lots of cracked tiles, the one with a post-tension slab, no cracked tiles. The cables are supported by plastic chairs and have steel anchors attached at each end. If you find the answer to this question useful, kindly. June 6, 2022 by Saad Iqbal. After that, the under-slab plumbing gets added and then the interior area of the concrete floor, commonly referred to as the slab, is poured. make recommendations as to the foundation type, including provisions for in a "raised" foundation with a crawlspace. March 24, 2016. Since the cables cannot be tensioned for atleast 7-days after the concrete is placed,visible RTS cracks are almost inevitable ina post-tensioned slab. study done. Thats why post-tensioned slabs are an initial investment worth it in the long run. Table 1: Post tension slab cost . Now, if you decide to pour a slab foundation, be advised that most slabs have There are pros and cons to both approaches, so be sure to ask plenty of questions when buying or building a house. After persistently researching for weeks, we decided that we wanted Turner and Son Homes to build our forever home. If several foundations are to be constructedusing the same design, a post-tension designwill almost always be less costly to thebuilder. endstream endobj 433 0 obj <>/Metadata 35 0 R/Outlines 53 0 R/PageLayout/OneColumn/Pages 430 0 R/StructTreeRoot 58 0 R/Type/Catalog>> endobj 434 0 obj <>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 435 0 obj <>stream The residual compression distributed throughout the slab supports the structure on top, and actively resists soil movement occurring under the slab. endstream endobj 437 0 obj <>stream Patrick and I would like to extend a sincere thank you to everyone at Turner Homes. Thereare other aspects, however, that, inpractice, mitigate this difference. hP8G/{gdVQ\@!T/s3*\\/fB& Software | Tech Notes | They love what they do and it certainly shows. WebAnswer (1 of 18): First get clear with that normal slab is reinforced concrete(RCC) structural element whereas post-tension slab is prestressed concrete (PSC) structure. The concrete slab isn't physically attached to the stem wall, so it's commonly known as a floating slab. A square 10,000 sqft slab will require less concrete than an irregularly shaped slab of the same size. The lubricant inside the plastic liner allows the cable to slide while the pressure is being applied. Post-tension concrete is created through the post-tensioning process, which is a form of prestressing there are other such forms for concrete as well, though they are not commonly used for courts. Unless people are having foundation issues? (918) 438-7721 So, while post-tensioned buildings experience more shortening than non-prestressed buildings, the overall increase is insignificant. I highly recommend starting your home-building experience with Turner and Sonyou wont be disappointed! ", Capital Homes12150 E. 96th St. N. Suite 202 The required thickness of reinforced concrete slabs for spans 6m, 8m, and 10m is 200mm, 260mm, and 330mm, respectively. So which foundation is the better option? Sand is acceptable, aggregate is wonderful, a vapor barrier on top to be a boundary directly below the new concrete. %PDF-1.6 % Couldn't you use fiber in the slab to reduce cracking? Traditional rebar is considered "passive reinforcement" meaning Because there critical elements for a good installation, you have to be careful about. This fact alone makes the post-tensioned slab potentially more flexible than a conventionally reinforced slab. way of designing floor slabs in concrete-framed buildings. WebFirst off, one could argue that post-tensioning is superior to conventionally reinforced concrete in a pure engineering sense. These benefits include: For more on the benefits of post-tension courts compared to traditional concrete, or to learn about any of our tennis courts, basketball courts or other options, speak to the staff at Courts Unlimited today. January 20, 2016. The force of the cables puts the entire slab and foundation under a continuous compression load, which means the slab and foundation becomes effectively one unit. What consummated our decision to go with this company was the fact that they never pressured us to sign a contract. Turner and Son was the first company we considered and we didnt have to look any further. Has anyone had problems? Enter the post-tension slab system. Later on, these tendons will be stressed to a specific concrete strength thats desired for the slab. Press question mark to learn the rest of the keyboard shortcuts A home builder for over 20 years, Tim is the "son" in Turner & Son Homes. Table 2: hollow core slab cost . Additional information on pier and grade Post-Tensioned concrete is also just easier and safer for construction workers because it can be lifted into place with cranes instead of having to be cast on site like other types of prestressed concrete.Less manual labor means less chances that something could go wrong, which in turn reduces costs. Post-tensioning is now widely used as an efficient . They also have better seismic protection. "bad clay" goes, what the moisture content is and where competent soil It is a way of putting a pre-compression into the concrete, in this case after it has been cast. Based on that I make a decision on which to use. The contractor places form boards around the perimeter to define the shape of the house and theplumber installs the under-slab plumbing before any steel is added or concrete poured. - More time required because there is simply more work that goes into post-tension. Turner and Son backed us up 100% by helping foot some of the court costs as well as standing by our sides as we went in front of the city. Overview of post-tension foundation. I truly believe they are all around the best! A lot depends on the soil under the slab. Post tension slabs or PT Slabs are concrete slabs in which high-strength steel tendons are placed that are subjected to tension after the slab concrete has been cast and dried. Please visit my fees-scheduling web page to make a preliminary appointment for a slab performance assessment. The reason is because post-tensioning is a method - Very tolerant of ceiling and roof loads placed on the slab. http://www.post-tensioning.org/pdfs/what-pt.pdf. WebPost tension slabs are cheaper, which means more profit for the builder. Post-tensioned done properly should not be cheaper than conventional. - A long, straight stretch of foundation and stem wall may tilt outward slightly, which can lead to cracks in the brick or drywall and gaps between the floor and wall inside the house. WebPost-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 First they wanted to make sure it was the best choice for our family. Re: post tension v. traditional slab Post tension is usually required for expansive soil, is this your case? Post-Tensioned Versus Conventionally Reinforced Slab Foundations, Options For Improving Slab Foundation Performance, How slab foundation repair contractors cheat, Identifying patterns of irregularities, distress and damage, Repeatedly underpinning a slab foundation, Service Areas, Fees & Scheduling An Appointment. If it werent for all of Athenas efforts in our home building process, we wouldnt have a new home! All Rights Reserved. What are the Advantages & Disadvantages of a Conventional It has been very exciting to be a part of the building process each day. Post-Tensioned Concrete: Five Decades of American Building Construction eginning in the 1950s as a Eu-ropean import, post-tensioned concrete has changed the face of American building con-struction. Once this was resolved, they began the building process and have kept us involved step by step. that it only provides reinforcement as the concrete is forced into tension. I've had 2 homes. Either way, you're looking at potential foundation and structural issues. The stem wall typically isn't reinforced with steel because it's not subjected to the movement or expansion of the soil underneath like the footing is. This method allows the slab to move with the soils, which prevents the slab from separating and causing structural issues. slabs. performed poorly in Texas where expansive soils are present. They have been great about staying in communication with us and I truly appreciate how they have kept the worksite extremely clean! Starting from lift slabs with button-headed wires and evolving into flying forms and cast-in-place slabs post-tensioned with strand tendons, post- This means the floor slab itself isn't really a structural part of the home, which requires planning in advance to route ceiling and roof loads to the outside walls. The construction teams were also very professional and friendly. This is a form of high-quality concrete that requires a specialized process, and were one of the only local court contractors able to carry out such work in Utah. 7. - Since the slab is floating, it is subject to vertical forces from the underlying soil that can lift parts of the slab and create nuisance cracks in tile. 6. Your company takes pride in their work and it shows in every way. endstream endobj startxref Conventional all the way. The piers (typically 12-16" in diameter) are drilled into the 457 0 obj <>/Filter/FlateDecode/ID[<476DAB11D2E6C345A2B476ED38202423>]/Index[432 43]/Info 431 0 R/Length 114/Prev 325429/Root 433 0 R/Size 475/Type/XRef/W[1 3 1]>>stream Jf The concrete for the footing, stem wall, and slab is poured at one time, which is called a monolithic pour. The process involves adding pressure and strength to the concrete for several reasons. Call: The stressing operation is accomplishedusing a hydraulic jack which attaches to the protruding cable end after the forms have been removed. improperly engineered and constructed foundations. hbbd```b``.3d L~`LU`]zM-0a9 & The post tensioning in slabs increase the load-bearing capacity of the structure and also help to counteract deflections. Site By So how would this pertain to a place like New Orleans, below sea level, requiring pilings throughout? Post-tension slabs are stronger than traditional concrete slabs; however, that does not necessarily mean a post-tension slab is without challenges. Post-tensioned slabs require less concrete than traditional ones, saving builders money. Now, post-tensioning isnt only done for multipurpose game courts. Looking for more in-depth info on building on your land? The StressCon System exponentially increases stability in the normal life of the structure. It has a greater resistance to tensile stresses, thanks to its manufacturing method. Enter the post-tension slab system. Shed Some Weight To pretension concrete the steel is first tensioned in a frame or between anchorages external to the member. important advantages over traditional rebar-reinforced slabs on expansive soils. I've used drill shafts here but I'm not familiar with New Orleans area foundation design requirements. however, is consistent with lower installed cost versus other methods. compaction of the building pad may be required to minimize foundation trouble. Maintenance: Finally, post-tension concrete requires limited maintenance, plus often brings energy savings due to reduced material usage. After the concrete has been placed and set to meet specifications, the tensioning process (called stressing), is applied to the cables. The concrete is then cast around it. All along our plan was to remain in our current home until we could move into our new home. For those looking into a new tennis court, basketball court, pickleball court or any other multipurpose court, material quality is a vital factor. They are easy to work with and go above and beyond to execute.

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