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Prestress/Post-Tensioning Strand Systems

DYWIDAG-Systems International

20-0.5 MA

Last edit date: 3/20/2024

GENERAL
Bar or Tendon Size Strand Diamter Ultimate (kips) Concrete Strength(psi) PJack (kips)
20 1/2" 826 N/A 620

WEDGES
Wedges Length Material Wedge Parts Wedge Angle Wedge Inside DiameterBABA Act Information*
1.575" AISI 12L143 7° 30' ± 10' Unconfirmed
1.575" AISI 11L173 7° 30' ± 10' Unconfirmed

ANCHOR HEADS
Anchor Heads Size Material Authorization DateBABA Act Information*
7.087" Ø x 2.756" ASTM-A521-76 (Forged )9/3/1997Unconfirmed
Wedge hole angle: 7°
Wedge hole diameter: 0.984"
Strand hole diameter: 0.551"

BEARING PLATES
Bearing Plates Size Material Authorization DateBABA Act Information*
9.843" Ø x 7.874" (MPA) ASTM-A536 Gr 65-45-129/17/1991Unconfirmed
Bearing hole diameter: 5.827"
Spiral size and turns: none

TRUMPETS
Trumpets Size Material Authorization DateBABA Act Information*
15.719" ASTM A4976 - H.D.P.EUnconfirmed

DUCTS
Ducts Size Material Authorization DateBABA Act Information*
3.720" O.D. Unconfirmed

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