Diagram of Post Tensioning Slab

Post-Tension Slab

Your typical Unbonded Post-Tensioned concrete slab will require the following items:

  1. Post-Tensioning Tendon
  2. Anchorage Devices (at stressing, intermediate, fixed ends)
  3. Reusable Pocket Formers (at stressing ends)
  4. Split Pocket Formers (at intermediate ends)
  5. Wedges (at stressing, intermediate, fixed ends)
  6. Stressing Equipment (jack, pump, gauge)

The encapsulated post-tension system requires additional corrosion-protection than the non-encapsulated post-tension system.  Contact us for more information here.

– Neel Khosa, Vice President, AMSYSCO
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Copyright © 2010 by AMSYSCO, Inc. All rights reserved.
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Shipping Post-Tension Tendons

Post-Tension Shipment

AMSYSCO Inc. ships its post-tensioning tendons primarily via flat-bed trucks (as seen in the picture above).  The tendon bundles have the “eye to the sky” and are on top on dunnage.  Usually, the bundles are unloaded using a overhead crane at the jobsite.

Each bundle includes roughly a hundred coiled and color-coded tendons.  Depending on the customized requirements and dimensions of the buildings, we fabricate many different tendon types with unique lengths.

If the construction specifications require additional corrosion-protection, then the tendon bundles may also have plastic shrink-wrapping around them and the truck/carrier may require a plastic tarp on top of the PT material.

– Neel Khosa, Vice President, AMSYSCO
____________________________________________

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

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Historical Timeline of Anti-Dumping with Prestressed Concrete Strand

Historical Timeline of Anti-Dumping (AD) and Countervailing Duties (CVD) associated with Prestressed Concrete (PC) Steel Wire Strand.

December 8, 1978:  U.S. Treasury issued antidumping findings on PC strand imports from Japan.

February 3, 1999:  After its first review, U.S. Department of Commerce (USDOC) issued a continuation of the antidumping duty findings on PC strand imports from Japan.
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January 31, 2003:  A coalition of three U.S. domestic strand suppliers filed an anti-dumping complaint against Brazil, India, Mexico, South Korea and Thailand with U.S. International Trade Commission (USITC).

March 17, 2003:  USITC preliminary determined that imports from five countries materially injured domestic PC strand producers.

July 11, 2003:  USDOC announced preliminary determinations for antidumping compliant and levied countervailing duties against five countries.

December 2, 2003:  USDOC and USITC announced issued anti-dumping order on prestressed concrete steel wire strand (PC strand) from Brazil, India, Mexico, South Korea and Thailand.
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Early/Mid 2004:  Strand shipments from China entered U.S. strand market through third-party brokers.

June 25, 2004:  USITC conducted second five-year review of PC steel wire strand from Japan and continues duties.

December 2008 to March 2009:  USITC conducted full five-year review of countervailing duty on PC strand from Brazil, India, Japan (3rd review), Korea, Mexico and Thailand.
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May 27, 2009:  A coalition of the same three U.S. domestic strand suppliers filed an anti-dumping complaint against Chinese strand suppliers.

July 10, 2009:  All six USITC commissioners voted in favor that there is a case for dumping.

October 26, 2009:  USDOC and USITC announced in affirmative preliminary determination with countervailing duty on strand from China.

December 18, 2009:  USDOC announced its preliminary determination of dumping rate of 37.72% to 193.55% (depending on the Chinese steel mill).

January 2010:  By-in-large, Chinese strand suppliers exited US market.

May 17, 2010:  USDOC announced its final determination in AD and CVD investigations.

June 10, 2010:  USITC determined US industry is materially injured by Chinese imports.  USDOC determined imports were subsidized and sold in the U.S. at less than fair value.

June 29, 2010:  USDOC and USITC announced issued anti-dumping duty order on prestressed concrete steel wire strand (PC strand) from China.
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– Rattan Khosa, AMSYSCO
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Copyright © 2010 by AMSYSCO, Inc. All rights reserved.
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