Monthly Archives: October 2009
VIDEO: Chicago Model City
I visited the Chicago Model City exhibit this weekend. The 3-D architectural models gave me a great birds-eye-view of downtown Chicago. The great thing was that I could see a lot of our Post Tensioned High-Rise Buildings within a 320 square-foot … Continue reading
Unbonded Post Tensioning – Protection
Lately, a lot of focus has been given to the technical aspects of unbonded post-tensioning systems. At times, however, the construction team must not forget the basic performance issues involved with post tensioning. In particular, the proper protection of unbonded post-tensioning tendons is fundamental … Continue reading
VIDEO: Field Friction Test for Post Tension Tendons
This educational video from AMSYSCO, Inc. shows the process for determining the Friction Coefficients. Post Tensioning Institute (definitions): Friction Loss: the loss of stress (force) in a prestressing tendon resulting from friction created between the strand and sheathing during stressing. … Continue reading