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Prestress/Post-Tensioning Strand Systems

DYWIDAG-Systems International

31-0.5

Last edit date: 3/20/2024

GENERAL
Bar or Tendon Size Strand Diamter Ultimate (kips) Concrete Strength(psi) PJack (kips)
31 1/2" 1280.3 N/A 961

WEDGES
Wedges Length Material Wedge Parts Wedge Angle Wedge Inside DiameterBABA Act Information*
1.375" AISI C12L14 CD Rc 58-67 7° 10' ± 5' Unconfirmed
1.470" AISI C12L14 CD Rc 58-67 7° 10' ± 5' Unconfirmed

ANCHOR HEADS
Anchor Heads Size Material Authorization DateBABA Act Information*
10" Square x 3 1/2" AISI C1045-C10505/29/1985Unconfirmed
10" Ø x 3 3/4" AISI C1045-C10505/29/1986Unconfirmed
Wedge hole angle: 6.5°
Wedge hole diameter: 0.92"
Strand hole diameter: 0.59"

BEARING PLATES
Bearing Plates Size Material Authorization DateBABA Act Information*
17" Square x 2 1/4" ASTM A-367/5/1986Unconfirmed
16 1/4" x 17 13/16" x 2 1/2" ASTM A-367/5/1986Unconfirmed
15 9/16" x 18 9/16" x 2 3/4" ASTM A-367/5/1986Unconfirmed
Bearing hole diameter: 7 1/4"
Spiral size and turns: none

TRUMPETS
Trumpets Size Material Authorization DateBABA Act Information*
30" 24 Gage5/29/1985Unconfirmed
28" Polyethylene 0.10"5/29/1985Unconfirmed
36" Polyethylene 0.10"5/29/1985Unconfirmed

DUCTS
Ducts Size Material Authorization DateBABA Act Information*
3 15/16" I.D. 26 Gage5/29/1985Unconfirmed

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