Post-Tensioning Accessories

Steel Bearing Plates

ASTM A36 or A572

 

Williams steel bearing plates, available in Grades 36 or50, are standard with a round hole or dished plates for use with spherical hex nuts. They can be drilled to provide free access for grout tube entry. Bearing plates are customized for each application. Plate dimensions should be specified around the parameters of the project. In addition, corrosion protection should be considered along with specifying hole diameter, bar angle and duct size.


 

 

Pocket Former

Nominal Bar
Diameter Range
Minimum
Diameter
Maximum
Diameter
Length Part
Number
1” to 1-3/8”
(26 to 36 mm)
5-5/16”
(135 mm)
6-1/4”
(159 mm)
8-1/2”
(216 mm)
R85-K
1-3/4”
(46 mm)
7”
(178 mm)
8-1/4”
(210 mm)
10-1/2”
(267 mm)
R85-2K

 


 

Spacer Nut for Pocket Former

Bar
Diameter
Part
Number
1”
(26 mm)
R8608
1-1/4”
(32 mm)
R8610
1-3/8”
(36 mm)
R8611
1-3/4”
(46 mm)
R73-14JN

Local Zone Reinforcing

The compressive strength of the concrete in the local zone (area directly under the bearing plate) can be enhanced when necessary by use of lateral confinement of spiral reinforcement. The rebar spirals are available in #3 through #5 diameters of Grade 60 Rebar and made to the project design requirements for diameter, pitch, and length. They are also available with or without a deformation pattern.

Galvanized Metal Corrugated Duct

ASTM A653

Williams Galvanized Spiral Metal Duct meets all physical and structural recommendations for post tensioning duct as indicated by the Post Tensioning Institute. TheDuct is available in 2”, 3”, and 4” diameter with couplings and reducer couplings for all sizes.

Polypropylene Corrugated Duct
Polyethylene Corrugated Duct

ASTM F405, ASTM D4104

The stable characteristics of Williams polypropylene & polyethylene duct are normally preferred where additional corrosion protection is desirable. Polypropylene Duct has been approved by the Florida DOT for internal tendons and is available in 2-3/8” internal diameter. Polyethylene Duct is available in 2”, 3”, and 4” diameters. Couplings are available for all sizes

 

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