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Prestress/Post-Tensioning Strand Systems

Schwager Davis Incorporated

SDI 27.6

Last edit date: 3/20/2024

GENERAL
Bar or Tendon Size Strand Diamter Ultimate (kips) Concrete Strength(psi) PJack (kips)
27 0.6" 1582 3500 1187

WEDGES
Wedges Length Material Wedge Parts Wedge Angle Wedge Inside DiameterBABA Act Information*
1-3/4" 2 7° 0.62"Unconfirmed

ANCHOR HEADS
Anchor Heads Size Material Authorization DateBABA Act Information*
9 3/4" (bearing end) x 4" w/step A536 GR. 80-55-0611/15/2007Unconfirmed
Wedge hole angle:
Wedge hole diameter: 1-3/16"
Strand hole diameter: 15/16"

BEARING PLATES
Bearing Plates Size Material Authorization DateBABA Act Information*
17" Ø. x 3 1/4" A536 GR. 80-55-0611/15/2007Unconfirmed
Bearing hole diameter: 7 5/8"
Spiral size and turns:

TRUMPETS
Trumpets Size Material Authorization DateBABA Act Information*
1'-6.5" HDPEUnconfirmed

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

SPIRAL
#5 spiral @ 18" OD, 4.2 turns @ 4" pitch

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