1. Home
  2. Programs
  3. Engineering Services (DES)
  4. Authorized Materials Lists (AML)
  5. Prestress/Post-Tensioning Strand Systems

Prestress/Post-Tensioning Strand Systems

DYWIDAG-Systems International

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" - 1.654" AISI C12L14 Rc 58-673 7° 10' ± 5' Unconfirmed
1.875" - 1.654" AISI 12L143 7° 10' ± 5' Unconfirmed
1.875" - 1.654" AISI 11L173 7° 10' ± 5' Unconfirmed

ANCHOR HEADS
Anchor Heads Size Material Authorization DateBABA Act Information*
4" Square x 2" C10459/12/1979Unconfirmed
4 1/2" Ø x 2" AISI 1045-105010/28/1992Unconfirmed
Wedge hole angle: 7°
Wedge hole diameter: 1.160"-1.122"
Strand hole diameter: 0.71"-0.669"

BEARING PLATES
Bearing Plates Size Material Authorization DateBABA Act Information*
7 3/8" Square x 1 1/8" ASTM A-369/12/1979Unconfirmed
Bearing hole diameter: 3 1/4"
Spiral size and turns: none

TRUMPETS
Trumpets Size Material Authorization DateBABA Act Information*
8" 22 Gage9/12/1979Unconfirmed

DUCTS
Ducts Size Material Authorization DateBABA Act Information*
2" I.D. 9/12/1979Unconfirmed

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