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Prestress/Post-Tensioning Strand Systems

Schwager Davis Incorporated

C31.6-8-S

Last edit date: 3/20/2024

GENERAL
Bar or Tendon Size Strand Diamter Ultimate (kips) Concrete Strength(psi) PJack (kips)
31 0.6" 1817 6500 1362

WEDGES
Wedges Length Material Wedge Parts Wedge Angle Wedge Inside DiameterBABA Act Information*
1.80" 2 7° Unconfirmed

ANCHOR HEADS
Anchor Heads Size Material Authorization DateBABA Act Information*
10.625 x 4.875 w/step A536 GR. 80-55-0612/10/2004Unconfirmed
Wedge hole angle: 6° 55'
Wedge hole diameter: 1.16"
Strand hole diameter: 11/16"

BEARING PLATES
Bearing Plates Size Material Authorization DateBABA Act Information*
18" x 3" Round A536 GR. 80-55-0611/25/2002Unconfirmed
Bearing hole diameter: 8.125"
Spiral size and turns: #5-5.7 turns

TRUMPETS
Trumpets Size Material Authorization DateBABA Act Information*
8 5/16" x 18.5" HDPEUnconfirmed

DUCTS
Ducts Size Material Authorization DateBABA Act Information*
127 mm o.d. galvanized spiroUnconfirmed

SPIRAL
#5 spiral @ 20" 5.7 turns @ 3" 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