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Prestress/Post-Tensioning Strand Systems

DYWIDAG-Systems International

37-0.5

Last edit date: 3/20/2024

GENERAL
Bar or Tendon Size Strand Diamter Ultimate (kips) Concrete Strength(psi) PJack (kips)
37 1/2" 1548.7 N/A 1146

WEDGES
Wedges Length Material Wedge Parts Wedge Angle Wedge Inside DiameterBABA Act Information*
1.575" AISI C12L143 7° 30' ± 10' Unconfirmed
1.575" AISI 11L173 7° 30' ± 10' Unconfirmed

ANCHOR HEADS
Anchor Heads Size Material Authorization DateBABA Act Information*
9.449" Ø x 4.134"(Forged) ASTM A521-76 Cl CC9/17/1991Unconfirmed
Wedge hole angle: 7° ± 10'
Wedge hole diameter: 1.102"
Strand hole diameter: 0.669"

BEARING PLATES
Bearing Plates Size Material Authorization DateBABA Act Information*
12.402" Ø x 9.449" ASTM A536 GR65-45-121/21/1988Unconfirmed
Bearing hole diameter: 7.490"
Spiral size and turns: #6-7 turns

TRUMPETS
Trumpets Size Material Authorization DateBABA Act Information*
26.26" ASTM D4976 - 0.138" Thick P.E. (Hard )1/21/1988Unconfirmed
27 7/8" ASTM D1248 - Hard Polyethlene3/27/1991Unconfirmed

DUCTS
Ducts Size Material Authorization DateBABA Act Information*
4.61" O.D. 26 Gage Steel1/21/1988Unconfirmed

SPIRAL
ASTM A 615 gr 60 # 6 21/4" pitch 17" O.D. 7 full turns

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