Post Tensioning.
PT Types.
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Visuals of RAFT foundation
OMAN / UAE
RAFT FOUNDATION
ESF has successfully executed the first ever PT Raft foundation in Oman. Also, similar projects were executed in U.A.E.. Design of raft PT slab requires skilled and precise analysis, which were carried out by expert staff of ESF.
- This reduces the stress on the ground below.
- Providing a solid foundation that can accommodate ground movement whilst still maintaining structural integrity.
POST TENSIONING
NORMAL PT SLABS
The design of normal flat slabs has evolved since the mid fifties, when the first post-tensioned slabs were built. Experience has enabled methods and criteria to be improved with greatly simplified structural design techniques, such as the load-balancing method along with the equivalent frame and finite element method are now widely used.
The preferred post-tensioned slab system in Dubai is well proven bonded tendon utilizing from 2 to 5 strands housed in oval ducting anchored in flat fan shaped anchorage castings. Stressing is carried out strand by strand using lightweight, portable jacking equipment.
- This system provides the thinnest floors and can give height reductions and substantial savings in façade costs.
Visuals of Normal PT slabs
Visuals of Lightweight slabs
POST TENSIONING
LIGHTWEIGHT SLABS
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POST TENSIONING
VOIDED PT SLABS
New Post Tension System was adopted, the Voided PT slab, a construction technique developed in U.S.A. & Europe, was applied in Estidama Pearl 3 rated project for Siemens Head Quarters in Abu Dhabi, U.A.E.. The concept centers on replacing the non working concrete dead load with light weight recycled material of maximum span of 15m carried without any requirement of drop beams. ESF was keenly involved in successfully coordinating for the execution of the voided PT slab with different trades.
- They weigh less, making the whole building structure more seismically resilient
- The foundations are less stressed because of the decreased construction load
Voided PT slab with concrete precast panel (Type 2 )
POST TENSIONING
U-BOOT (Type 1 )
U-Boot® Beton is used to create slabs with large span or that are able to support large loads without beams. Light and quick and easy to position, thanks to their modularity the designer can vary the geometric parameters as needed to adapt to all situations with great architectural freedom.
- Increased number of floors
- Lack of rising beams
- Reduced slab thickness
- Reduction in the number of pillars
