FAR 52.225-9 Guide: What Subs Must Ask the GC on Materials
When bidding federal work, trade subcontractors cannot simply assume standard commercial invoices will satisfy government material requirements. Federal construction solicitations incorporating FAR 52.225-9 Buy American-Construction Materials enforce strict domestic sourcing rules under 41 U.S.C. chapter 83. Because general contractors routinely flow these requirements down to framing, drywall, ceiling, and interior trades, subcontractors must identify compliance requirements before finalizing numbers. Use this question-based guide to clarify your material certifications with the prime contractor during the bid process.
1. "Are Any Package Materials Listed as Exceptions by the Contracting Officer?"
Your first question should clarify whether the government solicitation already lists pre-approved foreign materials. Under paragraph (b)(2) of FAR 52.225-9, the requirement to use domestic construction material does not apply to commercial product information technology, nor does it apply to items specifically identified by the Contracting Officer in the contract clause blanks. If the Contracting Officer entered "none," all materials brought to the site for incorporation must satisfy domestic tests unless an exception is granted later.
Knowing whether specific finishes or components are already excepted prevents unnecessary domestic sourcing premiums. If an excepted item covers part of your trade package, clarify this in your bid paperwork using structured bid exclusions and clarifications so both parties price identical scopes.
2. "Do Our Framing or Lath Assemblies Count as Predominantly Iron or Steel?"
Subcontractors handling drywall framing, structural studs, or ceiling grid accessories must establish how the product is classified under the clause. FAR 52.225-9 defines "predominantly of iron or steel or a combination of both" to mean that the cost of iron and steel content exceeds 50 percent of the total cost of all components. Steel itself is defined as an alloy containing at least 50 percent iron and between 0.02 and 2 percent carbon. For framing packages evaluated in a metal stud framing takeoff, this designation triggers very specific domestic manufacturing standards:
- The 5 Percent Foreign Cap: For construction material consisting wholly or predominantly of iron or steel, the material must be manufactured in the United States, and the cost of foreign iron and steel must constitute less than 5 percent of the cost of all components used.
- Melted and Coated Domestically: Produced in the United States means every manufacturing processāfrom initial melting through the application of coatingsāmust take place within the United States (the 50 States, District of Columbia, and outlying areas), excluding metallurgical processes involving steel additive refinement.
- Component Origins: The cost includes foreign iron or steel mill products like bar, billet, slab, wire, plate, or sheet, as well as castings and forgings. Any iron or steel components of unknown origin are automatically treated as foreign.
3. "Which Fasteners and Off-the-Shelf Products Rely on the COTS Waiver?"
Drywall screws, track pins, and common hardware are essential for interior assemblies. Subs should verify how the prime contractor applies the commercially available off-the-shelf (COTS) rules. Under 41 U.S.C. 1907 and FAR 12.505(a)(2), the standard domestic content test is waived for construction material that is a COTS item. However, there is a critical distinction for iron and steel products:
When construction material consists wholly or predominantly of iron or steel, the domestic content test is applied directly to the iron and steel content, but COTS fasteners are expressly excluded from that calculation. The clause defines a fastener as a hardware device that mechanically joins or affixes two or more objects together, giving specific examples such as nuts, bolts, pins, rivets, nails, clips, and screws. For non-steel products, a COTS itemādefined as a commercial product under FAR 2.101 sold in substantial quantities in the marketplace and provided without modification (excluding bulk cargo like petroleum or agricultural products)āqualifies as domestic construction material without measuring individual component percentages.
4. "Does the Project Schedule Fall Within the 65 Percent Component Content Window?"
For construction materials that do not consist wholly or predominantly of iron or steel, the required domestic component content percentage changes based on the delivery calendar year. Ask the prime contractor for the anticipated site delivery schedule to determine which threshold applies to your manufactured supplies:
- For items delivered in calendar years 2024 through 2028, the cost of components mined, produced, or manufactured in the United States must exceed 65 percent of the cost of all components.
- For items delivered starting in calendar year 2029, the domestic component threshold increases to exceed 75 percent.
- Under Alternate I of the clause, the Contracting Officer may specify a custom percentage in the contract.
Components of unknown origin must be calculated as foreign. Component costs cover contractor acquisition costs plus transportation to the point of incorporation and duty, or actual manufacturing costs plus transportation and allocable overhead without profit.
5. "What Data Is Needed if We Must Request an Unreasonable Cost Exception?"
If domestic items are unavailable or priced at an extreme premium, trade contractors must know what documentation the GC needs to petition the Contracting Officer. Under FAR 52.225-9, the cost of domestic material is considered unreasonable when it exceeds the cost of foreign material by more than 20 percent (with additional preference factors added for critical items or critical components listed at FAR 25.105). To submit a request based on unreasonable cost, subs must supply data for a formal price comparison table containing:
- Full descriptions of both foreign and domestic construction materials.
- Unit of measure, quantity, and price in dollars (inclusive of delivery costs to the site and duty).
- Time of delivery or material availability, project location, and the supplier's name and address.
- A market survey of suppliers, including written responses or oral summaries with contact names and phone numbers.
- For post-award requests, a full explanation proving why the need could not have been reasonably foreseen prior to award.
Sources
Federal Acquisition Regulation provisions cited in this guide:
Published October 31, 2026. No affiliate links on this page. Facts come from the sources linked above; check them for updates.