Wednesday 25 April 2012

Precast/prestressing post tensioning detailing drawings by experienced precast detailers

Precast detailing India is an experienced precast post tensioning services providers firm with an expertise of a wealth of engineering and contracting experience obtained through the successful completion of projects throughout USA, Canada, Australia, UAE, UK and overseas over the last 7 years. Our professional team of precast draftsman, precast detailers and precast engineers uses latest technology to convert paper drawings, hand sketches and design notes into a set of editable drawing formats. Precast detailing India participated in numerous domestic and international precast concrete post tensioning services projects. These projects include multi-story office buildings, schools and universities, stadiums, airports, hospitals, and churches. We have been successful in establishing ourselves as a quality supplier of precast post tensioning detailing drawings.

Post-tensioning is a method of reinforcing (strengthening) concrete or other materials with high-strength steel strands or bars, typically referred to as tendons. Post-tensioning applications include office and apartment buildings, parking structures, slabs-on-ground, bridges, sports stadiums, rock and soil anchors, and water-tanks. In many cases, post tensioning allows construction that would otherwise be impossible due to either site constraints.


Our most common post tension detailing drawings services includes:
  • Shop drawing Detailing of Post-Tension Building Structures
  • Analysis and Design of Post-Tension Building Structures
  • Field Placement Drawings
  • Felt Calculations for Stress Losses
  • Tendon and Chair Bills Of Material
  • Bills Of Material in MS Excel Formats
  • Drawings in AutoCAD and PDF Formats
  • Multistrand Post-Tensioning Drawings
  • Slab Post-Tensioning Detailing Drawings
  • Multiwire Post-Tensioning Detailing Drawings
  • Bar Post-Tensioning Detailing Drawings
  • External Post-Tensioning Detailing Drawings

There are two main types of post tensioning is unbonded and bonded (grouted).
An unbonded tendon is one in which the prestressing steel is not actually bonded to the concrete that surrounds it except at the anchorages. The most common unbounded systems are monostrand (single strand) tendons, which are used in slabs and beams for buildings, parking structures and slabs-on-ground. A monostrand tendon consists of a seven-wire strand that is coated with corrosion-inhibiting grease and encased in an extruded plastic protective sheathing. The anchorage consists of an iron casting and a conical, two-piece wedge which grips the strand.

In bonded systems, two or more strands are inserted into a metal or plastic duct that is embedded in the concrete. The strands are stressed with a large, multi-strand jack and anchored in a common anchorage device. The duct is then filled with a cementitious grout that provides corrosion protection to the strand and bonds the tendon to the concrete surrounding the duct. Bonded systems are more commonly used in bridges, both in the superstructure (the roadway) and in cable-stayed bridges, the cable-stays. In buildings, they are typically only used in heavily loaded beams such as transfer girders and landscaped plaza decks where the large number of strands required makes them more economical. Contact Us or Email: info@precastdetailingindia.com to know more about our post tension detailing services and drawings.