Title: NEW PTI SPECIFICATION UPDATE REQUIRES THE USE OF ENCAPSULATED TENDONS
NEW PTI SPECIFICATION UPDATE REQUIRES THE USE OF ENCAPSULATED TENDONS
FARMINGTON HILLS, MI (January 16, 2012) Ė The Post-Tensioning
Institute (PTI) has announced a new specification update approved by the PTI Board
of Directors and the Technical Advisory Board. Addendum #3 to PTI
for Unbonded Single Strand Tendons requires the following:
All unbonded single
strand post-tensioning tendons used for structures designed in accordance with
Code Requirements for Structural Concrete (ACI 318) must be
encapsulated. The encapsulation of the tendons shall be in accordance with the
material requirements for aggressive environments in the PTI Specification for Unbonded
Single Strand Tendons (PTI M10.2-00).
The intent is to augment the durability of the
post-tensioning systems used for all applications governed by ACI 318. Encapsulated
systems provide additional protection of the prestressing steel regardless of
location of the structure or exposure to moisture intrusion from any source.
Addendum #3 to PTI M10.2-00 Specification for Unbonded Single
Strand Tendons is available for free download on PTIís
website at http://post-tensioning.org/Uploads/Addendum3.pdf
For additional information contact:
L. Neff, P.E.