Description
This specification provides specific performance criteria for materials for
unbonded single strand tendons and detailed recommendations for fabrication materials and installation of unbonded single strand tendons. Specifications are
presented for tendons in non-aggressive environments and for tendons in
aggressive environments. The more restrictive material, fabrication, and
construction requirements for tendons used in aggressive environments are
essential to the long-term durability of tendons used in such circumstances.
Notes to Specifier: This specification is incorporated by reference in the
project specifications using the wording in P4 of the preface and including
the information from the mandatory, optional, and submittal checklists
following the specification.
ACI Specification 423.6-01 and Commentary 423.6R-01 are pre-sented
in a side-by-side column format, with specification text placed in
the left-hand column and the corresponding commentary text aligned in
the right column. Commentary section numbers are preceded by the let-ter
The Commentary is not a part of this specification.
Keywords: anchorage; construction joint; contractor; coupler; deicer; post-tensioning; prestress; prestressing steel; sheathing; specification; strand;
unbonded tendon.
Keywords: anchorage; construction joint; contractor; coupler; deicer; posttensioning; prestress; prestressing steel; sheathing; specification; strand;
unbonded tendon.
Table of Contents
Part 1—General
1.1—Scope
1.2—Definitions
1.3—Referenced standards
1.4—System description
1.5—Submittals
1.5.1—Prestressing steel
1.5.2—Anchorages and couplers
1.5.3—Sheathing
1.5.4—Post-tensioning coating
1.5.5—Fabrication plant
1.5.6—Stressing jack calibration
1.5.7—Stressing records
1.6—Fabrication
1.6.1—General
1.6.2—Handling, storage, and shipping
1.6.2.1—Handling
1.6.2.2—Storage before shipping
1.6.2.3—Shipping
1.7—Delivery, handling, and storage
1.7.1—Delivery
1.7.2—Handling and storage
Part 2—Products
2.1—Prestressing steel
2.1.1—General
2.1.2—Acceptance criteria for surface condition
2.1.3—Compliance requirements
2.2—Anchorages and couplers
2.2.1—Anchorages
2.2.1.1—Static tests
2.2.1.2—Fatigue tests
2.2.1.3—Bearing stresses
2.2.2—Castings
2.2.3—Wedge-type anchorages
2.2.4—Couplers
2.2.5—Compliance requirements
2.2.6—Anchorages and couplers in aggressive
environments
2.3—Sheathing
2.3.1—General properties
2.3.2—Minimum thickness and diameter
2.3.3—Manufacturing processes
2.3.4—Sheathing coverage
2.3.5—Aggressive environments
2.4—Post-tensioning coating
2.4.1—General properties
2.4.2—Type of coating
2.4.3—Minimum quantity
2.4.4—Performance criteria
Part 3—Execution
3.1—General
3.2—Tendon installation
3.2.1—General
3.2.2—Stressing-end anchorages
3.2.3—Intermediate anchorages
3.2.4—Fixed-end anchorages
3.2.4.1—Wedge-type anchorages
3.2.5—Sheathing inspection and repair
3.3—Concrete placement
3.3.1—General
3.3.2—Placement
3.3.3—Protection of tendons
3.3.4—Sheathing repair
3.4—Tendon stressing
3.4.1—General
3.4.2—Jack calibration
3.4.3—Elongation measurement
3.5—Tendon finishing
3.5.1—General
3.5.2—Aggressive environments
3.5.3—Stressing pockets