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Prestress/Post-Tensioning Strand Systems

Stresstek

S31.5

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*
1.47" AISI 12L142 7° Unconfirmed
1.609" AISI 12L143 7° Unconfirmed
1.47" AISI C11L172 7° Unconfirmed
1.609" AISI C11L173 7° Unconfirmed

ANCHOR HEADS
Anchor Heads Size Material Authorization DateBABA Act Information*
8.875" Ø x 3.750" AISI C1045 Or 4140/4212/31/1996Unconfirmed
Wedge hole angle: 7°
Wedge hole diameter: 0.96"-1.02"
Strand hole diameter: 0.625"

BEARING PLATES
Bearing Plates Size Material Authorization DateBABA Act Information*
17.7" Square x 2.50" ASTM-A36 Gr4212/31/1996Unconfirmed
Bearing hole diameter: 7.4"
Spiral size and turns: none

TRUMPETS
Trumpets Size Material Authorization DateBABA Act Information*
There are no trumpet components for this system at this time

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