Category Archives: Post Tension

Material Properties of Post-Tension Strands

Posted on January 29, 2010 by Neel Khosa

The following is a list of basic formulas for 270 ksi, 7-wire Prestressing steel strand (per ASTM-A416) used in Post-Tensioned concrete. _______________________________ Assume 0.5″ diameter strand has cross-sectional area of 0.153 sq.in. and weight of 0.525 lbs/ft. Assume 0.6″ diameter strand … Continue reading →

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VIDEO: Plastic Extrusion of PC Strand for Unbonded Post-Tensioning

Posted on January 28, 2010 by Neel Khosa

This video shows the Plastic Extrusion process for Unbonded Post-Tensioning.  Raw materials include steel PC Strand, corrosion-inhibiting Post Tensioning coating and HDPE plastic with color concentrate. The steel strand is moving at over 200 feet per minute in the extrusion … Continue reading →

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5 Facts about Post Tensioning

Posted on January 8, 2010 by Neel Khosa

Here are 10 facts about Unbonded Post Tensioning. 1. One tendon consists of: A high-strength steel strand (ASTM-416) PT coating (“grease”) Plastic sheathing (HDPE) Watch our YouTube video about how to make a PT tendon. 2.  The high-strength steel strand has 6-wires braided around 1 king-wire … Continue reading →

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