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Prestress/Post-Tensioning Strand Systems

Schwager Davis Incorporated

SDI 12.6

Last edit date: 3/20/2024

GENERAL
Bar or Tendon Size Strand Diamter Ultimate (kips) Concrete Strength(psi) PJack (kips)
12 0.6" 703 4500/6500 527

WEDGES
Wedges Length Material Wedge Parts Wedge Angle Wedge Inside DiameterBABA Act Information*
1-3/4" AISI 12L142 7° 9/16"Unconfirmed
1-3/4" AISI 11L172 7° 9/16"Unconfirmed

ANCHOR HEADS
Anchor Heads Size Material Authorization DateBABA Act Information*
7.25"Ø x 3.375" A536 Gr. 80-55-0611/25/2002Unconfirmed
Wedge hole angle:
Wedge hole diameter:
Strand hole diameter:

BEARING PLATES
Bearing Plates Size Material Authorization DateBABA Act Information*
11.5"Ø x 3" A536 Gr. 80-55-0611/25/2002Unconfirmed
Bearing hole diameter: 5.375"
Spiral size and turns:

TRUMPETS
Trumpets Size Material Authorization DateBABA Act Information*
14" x 5 7/16" HDPEUnconfirmed

DUCTS
Ducts Size Material Authorization DateBABA Act Information*
3.25" O.D. galvanized spiroUnconfirmed

SPIRAL
VARIES depending on concrete strength: see approval letter

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