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  5. Performing Pre-Tensioning Calibrations
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    Performing Pre-Tensioning Calibrations

    Per Section 50 "Prestressing Concrete" of the California Department of Transportation (the Department) Standard Specifications, pretensioning jacks shall be calibrated by an authorized laboratory.

    Listed below are authorized laboratories to perform pretensioning calibrations. To be on this list, please refer to the Department's requirements, "Authorized Laboratory Qualification Requirements to Perform Pre-Tensioning Calibrations for the California Department of Transportation (Caltrans)". The document is found at the following link: Authorized Laboratory Qualification Requirements to Perform Pre-Tensioning Calibrations

    Last edit date: 12/18/2024
    Fabricator LocationContact Expiration Date
    Ad-Tek, Inc. (Authorized To Calibrate Using Load Cells Up To 50,000 Lbf Capacity) 28111 SE Wally Road
    Boring, OR 97009

    503-663-7265 ext>110, stefanie@advancedcalibration.com

    November 23, 2026
    Pacific Calibration Services 6280 San Ignacio Avenue, Suite D
    San Jose, CA 95119

    (650) 591-2177
    http://www.pacificcalibration.com/

    April 21, 2025
    Technical Associated Services 7832 Franklin Drive
    Huntington Beach, CA 92648

    (714) 841-0475
    http://tascalibration.com/

    March 31, 2023

    Caltrans contact: Structural Materials Testing Lab, smtl@dot.ca.gov

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