AMSYSCO Post Tension Blog » Video http://www.amsyscoinc.com/blog Post-Tensioning for Concrete Contractors, Structural Engineers and Architects Thu, 19 Jan 2012 20:45:35 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Video : Stressing Unbonded Post Tension Tendon http://www.amsyscoinc.com/blog/2011/06/16/video-stressing-unbonded-post-tension-tendon/ http://www.amsyscoinc.com/blog/2011/06/16/video-stressing-unbonded-post-tension-tendon/#comments Thu, 16 Jun 2011 23:31:35 +0000 admin http://www.amsyscoinc.com/blog/?p=2052 This short video show the stressing an unbonded post-tensioning tendon with a hydraulic jack (8-inch stroke). This tendon was roughly 130 feet long so it required two strokes. The elongation for a 100-foot-long tendon is roughly 8 inches. Refer to the Post-Tensioning Institute’s “Field Procedures Manual for Unbonded Single-Strand Tendons” Chapter 6 for additional information.

. . . → Read More: Video : Stressing Unbonded Post Tension Tendon]]> This short video show the stressing an unbonded post-tensioning tendon with a hydraulic jack (8-inch stroke). This tendon was roughly 130 feet long so it required two strokes. The elongation for a 100-foot-long tendon is roughly 8 inches. Refer to the Post-Tensioning Institute’s “Field Procedures Manual for Unbonded Single-Strand Tendons” Chapter 6 for additional information.


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Copyright © 2011 by AMSYSCO, Inc. All rights reserved.

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]]> http://www.amsyscoinc.com/blog/2011/06/16/video-stressing-unbonded-post-tension-tendon/feed/ 0 Video : Applying paint mark for Tendon Elongation http://www.amsyscoinc.com/blog/2011/06/16/applying-paint-mark-for-tendon-elongation/ http://www.amsyscoinc.com/blog/2011/06/16/applying-paint-mark-for-tendon-elongation/#comments Thu, 16 Jun 2011 23:17:34 +0000 admin http://www.amsyscoinc.com/blog/?p=2040 This short clip shows how to apply paint-marks prior to stressing of post-tension tendons. It’s recommended to use a straight-edge, metal to help with elongation measurements. Refer to the Post-Tensioning Institute’s “Field Procedures Manual for Unbonded Single-Strand Tendons” Chapter 7 for additional information. _________________________________________________

Copyright © 2011 by AMSYSCO, Inc. All rights reserved.

. . . → Read More: Video : Applying paint mark for Tendon Elongation]]> This short clip shows how to apply paint-marks prior to stressing of post-tension tendons. It’s recommended to use a straight-edge, metal to help with elongation measurements. Refer to the Post-Tensioning Institute’s “Field Procedures Manual for Unbonded Single-Strand Tendons” Chapter 7 for additional information.

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Copyright © 2011 by AMSYSCO, Inc. All rights reserved.

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]]> http://www.amsyscoinc.com/blog/2011/06/16/applying-paint-mark-for-tendon-elongation/feed/ 0 Pictures : Manufacturing of Unbonded Post-Tensioning http://www.amsyscoinc.com/blog/2011/04/09/pictures-manufacturing-of-unbonded-post-tensioning/ http://www.amsyscoinc.com/blog/2011/04/09/pictures-manufacturing-of-unbonded-post-tensioning/#comments Sat, 09 Apr 2011 17:41:19 +0000 admin http://www.amsyscoinc.com/blog/?p=1988 Slideshow if (swfobject.getFlashPlayerVersion().release) { var flashvars = {settings: "http://www.amsyscoinc.com/blog/wp-admin/admin-ajax.php?action=fgallery_config%26gall_id=1", images : "http://www.amsyscoinc.com/blog/wp-admin/admin-ajax.php?action=fgallery_images%26gall_id=1"}; var params = {bgcolor: "#ffffff", allowFullScreen: "true", wmode: "transparent"}; swfobject.embedSWF("http://www.amsyscoinc.com/blog/wp-content/plugins/1-flash-gallery/swf/arai.swf", "flashcontent_14f2ea88e3ee76", "450", "385", "10.0.0",false, flashvars, params); } else { jQuery(document).ready(function(){ jQuery("#myGallery_14f2ea88e3ee76").photoGallery({gall_id : "1"}); }); }

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]]> http://www.amsyscoinc.com/blog/2011/04/09/pictures-manufacturing-of-unbonded-post-tensioning/feed/ 0 Video: Un-extruded PC Strand http://www.amsyscoinc.com/blog/2011/03/30/video-un-extruded-pc-strand/ http://www.amsyscoinc.com/blog/2011/03/30/video-un-extruded-pc-strand/#comments Wed, 30 Mar 2011 23:22:24 +0000 admin http://www.amsyscoinc.com/blog/?p=1965 PC Strand is a high-strength steel cable used in Post-Tensioned concrete. This video shows the PC Strand prior to the plastic extrusion process (unbonded PT).

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Copyright © 2011 by AMSYSCO, Inc. All rights reserved. . . . → Read More: Video: Un-extruded PC Strand]]> PC Strand is a high-strength steel cable used in Post-Tensioned concrete. This video shows the PC Strand prior to the plastic extrusion process (unbonded PT).


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]]> http://www.amsyscoinc.com/blog/2011/03/30/video-un-extruded-pc-strand/feed/ 0 VIDEO : Post-Tensioning – Cutting Line Machine http://www.amsyscoinc.com/blog/2010/09/16/post-tensioning-cutting-line-machine/ http://www.amsyscoinc.com/blog/2010/09/16/post-tensioning-cutting-line-machine/#comments Thu, 16 Sep 2010 18:27:55 +0000 admin http://www.amsyscoinc.com/blog/?p=1667 . . . → Read More: VIDEO : Post-Tensioning – Cutting Line Machine]]> This short video shows the process of cutting extruded post-tension cables into individual tendons. Eventually the tendons are secured and anchorages are attached. Then the tendons are packaged and shipped to construction sites.

This process is for Unbonded Post-Tensioning System used in Concrete Construction. Visit www.amsyscoinc.com for further information.

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Copyright © 2010 by AMSYSCO, Inc. All rights reserved.

]]> http://www.amsyscoinc.com/blog/2010/09/16/post-tensioning-cutting-line-machine/feed/ 0 VIDEO : Post-Tensioning – Extrusion Machine http://www.amsyscoinc.com/blog/2010/09/16/post-tensioning-extrusion-machine/ http://www.amsyscoinc.com/blog/2010/09/16/post-tensioning-extrusion-machine/#comments Thu, 16 Sep 2010 18:25:30 +0000 admin http://www.amsyscoinc.com/blog/?p=1672 . . . → Read More: VIDEO : Post-Tensioning – Extrusion Machine]]> This short video shows the final part of process of extruding post-tension cables into reels. Eventually the reel is cut into individual tendons (refer to http://www.youtube.com/watch?v=iq_ZZV… ).

This process is for Unbonded Post-Tensioning System used in Concrete Construction.

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Copyright © 2010 by AMSYSCO, Inc. All rights reserved.

]]> http://www.amsyscoinc.com/blog/2010/09/16/post-tensioning-extrusion-machine/feed/ 1 VIDEO: Plastic Extrusion of PC Strand for Unbonded Post-Tensioning http://www.amsyscoinc.com/blog/2010/01/28/video-extrusion-post-tensioning/ http://www.amsyscoinc.com/blog/2010/01/28/video-extrusion-post-tensioning/#comments Thu, 28 Jan 2010 23:17:55 +0000 admin http://www.amsyscoinc.com/blog/?p=885 . . . → Read More: 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 machine. First the steel PC strand is coated with corrosion-inhibiting Post-Tension Coating (“grease”). Then, the coated steel has either 40ml or 50ml of HDPE (high-density-polyethylene) plastic extruded over it. Finally, the extruded strand is cooled within a long trough of chilled water.

Please CLICK HERE to view other AMSYSCO videos about Post-Tensioned Concrete at the “amsysco” Channel.

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Copyright © 2010 by AMSYSCO, Inc. All rights reserved.
]]> http://www.amsyscoinc.com/blog/2010/01/28/video-extrusion-post-tensioning/feed/ 1 VIDEO: Chicago Model City http://www.amsyscoinc.com/blog/2009/10/27/chicago-model-city/ http://www.amsyscoinc.com/blog/2009/10/27/chicago-model-city/#comments Tue, 27 Oct 2009 22:04:50 +0000 admin http://www.amsyscoinc.com/blog/?p=683 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 area.

The “Chicago Model City” exhibit is open daily and the Chicago Architecture Foundation gives a . . . → Read More: 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 area.

The “Chicago Model City” exhibit is open daily and the Chicago Architecture Foundation gives a history of Daniel Burnham’s city plan for Chicago on Fridays and Saturdays 12:30PM.  Kudos to the Chicago Architecture Foundation.

Visit www.chicagomodelcity.org/ and http://www.architecture.org/ for more information.

This video clip was uploaded from my Android phone.

- Neel Khosa, AMSYSCO

Copyright © 2009 by AMSYSCO, Inc. All rights reserved.

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]]> http://www.amsyscoinc.com/blog/2009/10/27/chicago-model-city/feed/ 0 VIDEO: Field Friction Test for Post Tension Tendons http://www.amsyscoinc.com/blog/2009/10/07/video-field-friction-test-for-post-tension-tendons/ http://www.amsyscoinc.com/blog/2009/10/07/video-field-friction-test-for-post-tension-tendons/#comments Wed, 07 Oct 2009 19:53:24 +0000 admin http://www.amsyscoinc.com/blog/?p=659 . . . → Read More: 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.
  • Wobble:  the friction caused by the unintended horizontal deviation of the tendon.
  • Angular Curvature:  the friction caused by the profile of the tendon.

American Concrete Institute (ACI-318 Chapter 18, Table R18.6.2) gives ranges for Bonded and Unbonded post tensioning tendons.  The lower the Wobble and Angular Curvature friction coefficients are, the higher the force per tendon. A higher force per tendon can help solve field issues such as broken tendons or under-elongations.

AMSYSCO, Inc. recently conducted a field friction test in 2009 for our 0.5″ diameter Unbonded Post Tension Tendon.  We used the “load-cell” method (shown in the video) and our friction coefficients outperformed the recommended values given by American Concrete Institute.  To request a copy of our results, please email us at info@amsyscoinc.com.

Copyright © 2009 by AMSYSCO, Inc. All rights reserved.

]]> http://www.amsyscoinc.com/blog/2009/10/07/video-field-friction-test-for-post-tension-tendons/feed/ 2 VIDEO: How is a Post Tensioning Tendon made? http://www.amsyscoinc.com/blog/2009/09/01/how-is-post-tensioning-made/ http://www.amsyscoinc.com/blog/2009/09/01/how-is-post-tensioning-made/#comments Tue, 01 Sep 2009 22:21:44 +0000 admin http://www.amsyscoinc.com/blog/?p=434 . . . → Read More: VIDEO: How is a Post Tensioning Tendon made?]]> This is a short educational video for Structural Engineers, Architects and Construction General/Concrete Contractors interested in learning about the fabrication of an Unbonded Post Tensioning Tendon.



Copyright © 2009 by AMSYSCO, Inc. All rights reserved.

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