Authorization Criteria for Headed Reinforcing Steel Fabricators List
Revised: 6/30/2017
- Manufacturer/Supplier provides
- The model number/name of the product.
- Brochures, shop drawings, and other technical information that indicates
- Dimensions
- Materials
- Documentation of heat treatment and/or any special manufacturing process (e.g., forging the bar end).
- Quality control manual for materials and manufacturing process (es). As a minimum, the QC manual shall include the following:
- The pre-production procedures for the qualification of materials and equipment.
- The methods and frequencies for performing QC procedures during production.
- The calibration procedures and calibration frequency for all equipment.
- The welding procedure specification (WPS) for friction welded headed bar reinforcement.
- A system for marking and tracking headed bar reinforcement lots with the following information:
- Production lot numbers
- Heats of bar material and head material used in the manufacture of each production lot
- Number of bars in each production lot
- Manufacturing records, including tracking and production parameters for welds or forgings.
- Test report from an independent testing lab verifying that the product meets Caltrans’ Standard Specifications, Section 52, and ASTM A970/A 970M specifications.
- Four headed rebar samples for each rebar size: 4 feet long for rebar sizes #9 and below and 6.0 feet long for rebar sizes #10 and above.
- Mill certificates for head material and rebar for e ach sample and rebar size.
- Caltrans will:
- Ensure all required documentation and samples are received.
- Review the technical information the supplier provided.
- Perform mechanical testing
- Cyclical test per Test Method CT 670
- Tensile test per Test Method CT 670
- Tensile strength shall conform to the requirements specified in ASTM Designation: A 970/A 970M, Class A (80 ksi minimum).
- Rupture in the rebar, with visible necking or decrease in the sample’s cross- sectional area, at the point of rupture. The visible necking must be located at least one bar diameter away from the affected zone.
- Upon evaluation of results from II.A to II.C above, issue either an acceptance letter or rejection letter.
- Update the AUTHORIZED LIST OF HEADED REINFORCING STEEL FABRICATORS, if applicable.
- Authorization Expiration Date
- Each authorized headed bar will be assigned an expiration date after being authorized. To maintain authorization on the Authorized Materials List, manufacturers must submit documentations/test samples as specified in section IV at least 60 days prior to the expiration date.
- Documentation required to maintain authorization on the AML include the following:
- Documents specified in section I.A to I.C.
- A signed memo to the Department, stating/specifying modifications/revisions (if any) were made to the headed reinforcement since authorized by the Department. Revisions include but are not limited to dimensional changes, material specifications, and manufacturing processes.
- Upon satisfying the submittal requirements, you may be contacted by the Department to submit samples for reauthorization testing.
Caltrans contact: Structural Materials Testing Lab, smtl@dot.ca.gov