Iron and Steel

Requirements pertaining to iron and steel are applicable to all projects per
Transportation Code 223.045
and
23 CFR 635.410
. Iron and Steel products are certified via Form 1818, or a Certification letter as stated under: "Miscellaneous Steel".
Only for projects let December 2025 or later, no project level certification such as the 1818 or Certification letter is required when dictated by the MPL.
Iron and Steel documentation may fall into one of the below methods of compliance.
  • Structural materials tested by Materials Test Division (MTD)
    • MTD maintains Buy America documentation. The district is required to verify a structural testing report is available and obtain material sourcing information from the contractor.
  • Iron and Steel items other than reinforcing steel
    • Area Office collects the 1818, materials sourcing information, and applicable certifications. Some items may require a project sample to be submitted and tested by MTD.
    • For projects let December 2025 or later,
      Buy America status may be listed on the MPL. Area Office obtains material sourcing information and verifies material is
      on the MPL. A Buy America Certification as indicated
      on the MPL is collected as part of the approval process.
  • Reinforcing steel in precast items found on the Material Producer List (MPL)
    • Area Office obtains material sourcing information and verifies material is on the MPL. Mill test reports are maintained by the manufacture.
  • Reinforcing steel for cast in place items
    • Area Offices
      will periodically check mill test reports for
      reinforcing steel, collect mill test reports from those checks.
       Example is documentation between the mill and supplier, and the supplier and the project.
    • Area Office verifies rebar markings when inspecting steel, collects/document mill tags on rebar shipments, and documents verifying Buy America in the DWR.
    • Materials may be covered by TxDOT's Gold Star Program.
      Refer to Gold Star Program section for more information.
Refer to the project records checklist for guidance on what method of compliance an iron or steel product may fall under. Questions on structural items tested by MTD may be directed to MTDs Prefabricated Structural Materials Section. General Buy America questions may be directed to Construction Division.