Monthly Archives: January 2010
Material Properties of Post-Tension Strands
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
VIDEO: Plastic Extrusion of PC Strand for Unbonded Post-Tensioning
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
Commercial Construction 2010
As 2008 and 2009 are behind us and 2010 is still young, I thought to share my insights with the reader about the Commercial Construction industry. COMMERCIAL CONSTRUCTION (2008-2009) 2009 was a year that most in the construction industry would … Continue reading