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Prestress/Post-Tensioning Strand Systems

Contech

4-0.6

Last edit date: 3/20/2024

GENERAL
Bar or Tendon Size Strand Diamter Ultimate (kips) Concrete Strength(psi) PJack (kips)
4 0.6" 234.4 3500 176

WEDGES
Wedges Length Material Wedge Parts Wedge Angle Wedge Inside DiameterBABA Act Information*
1.875" AISI 12L14 Rc 59-653 7° 10' ± 10' 0.620" x 4°Unconfirmed

ANCHOR HEADS
Anchor Heads Size Material Authorization DateBABA Act Information*
5 1/8" Ø x 2 3/8" Ductile Iron ASTM A-536-80-55-0611/7/1989Unconfirmed
Wedge hole angle: 7°
Wedge hole diameter: 1.250"
Strand hole diameter: 0.62"

BEARING PLATES
Bearing Plates Size Material Authorization DateBABA Act Information*
8 1/2" Square x 1 1/2" Steel AAHSTO MI83 C.T.S.11/7/1989Unconfirmed
Bearing hole diameter:
Spiral size and turns: none

TRUMPETS
Trumpets Size Material Authorization DateBABA Act Information*
ASTM A-3610/23/1989Unconfirmed

DUCTS
Ducts Size Material Authorization DateBABA Act Information*
There are no duct components for this system at this time

SPIRAL
-

Caltrans contact: Jim Ma, Concrete Committee Chair, jim.ma@dot.ca.gov

*As attested to by the supplier as of April 14, 2026 per definition in 2 CFR 184 and 23 CFR 635.410. Stakeholders should use this information in conjunction with corresponding Caltrans special provision section 6-1.04 to understand applicable requirement for the project.

The California Department of Transportation (Caltrans) is implementing statutory changes required by the Bipartisan Infrastructure Law -Build America, Buy America Act (BABA), as outlined in 2 CFR 184 and 23 CFR 635.410.

https://www.fhwa.dot.gov/construction/cqit/buyam.cfm