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Prestress/Post-Tensioning Strand Systems

DYWIDAG-Systems International

27-0.5 MA

Last edit date: 3/20/2024

GENERAL
Bar or Tendon Size Strand Diamter Ultimate (kips) Concrete Strength(psi) PJack (kips)
27 1/2" 1115.1 N/A 836.3

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*
7.874" Ø x 3.425" 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*
11.024" Ø x 8.66" (MPA) ASTM-A536 Gr 65-45-121/21/1988Unconfirmed
Bearing hole diameter: 6.378"
Spiral size and turns: #5-7 turns

TRUMPETS
Trumpets Size Material Authorization DateBABA Act Information*
17.764" ASTM D4976 - Hard P.E.Unconfirmed

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

SPIRAL
ASTM A615 Gr 60 # 5 rebar ,1.875" pitch. 14.500 OD, 7 full turn.

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