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Prestress/Post-Tensioning Strand Systems

DYWIDAG-Systems International

27-0.6 MA

Last edit date: 3/20/2024

GENERAL
Bar or Tendon Size Strand Diamter Ultimate (kips) Concrete Strength(psi) PJack (kips)
27 0.6" 1582.2 4000 1188

WEDGES
Wedges Length Material Wedge Parts Wedge Angle Wedge Inside DiameterBABA Act Information*
1.654" AISI C12L143 7° 30' ± 10' 0.56" ± 0.003"Unconfirmed
1.654" AISI C11L173 7° 30' ± 10' 0.56" ± 0.003"Unconfirmed

ANCHOR HEADS
Anchor Heads Size Material Authorization DateBABA Act Information*
9.449"Ø x 4.134" ASTM A-521-76 (forged)9/17/1991Unconfirmed
9.5"Ø x 4.75" HR C104510/18/2007Unconfirmed
9.449"Ø x 4.134" ASTM A536 Gr.80-55-068/18/2014Unconfirmed
Wedge hole angle:
Wedge hole diameter:
Strand hole diameter:

BEARING PLATES
Bearing Plates Size Material Authorization DateBABA Act Information*
12.402"Ø x 9.449" ASTM A536 Gr. 65-45-1210/18/2007Unconfirmed
12.402"Ø x 9.469" ASTM A536 Gr. 65-45-128/18/2014Unconfirmed
Bearing hole diameter:
Spiral size and turns:

TRUMPETS
Trumpets Size Material Authorization DateBABA Act Information*
22.625" x 6.339" Hard Polyethylene10/18/2007Unconfirmed
26.628" x 6.339" Hard Polyethylene10/18/2007Unconfirmed

DUCTS
Ducts Size Material Authorization DateBABA Act Information*
4.375" O.D. ASTM A653 Gr.6010/18/2007Unconfirmed

SPIRAL
A615 Grade 60 #6 @ 2.25" pitch; 17" O.D.; 7 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