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Acronymsaka: ASTM Internationalaka: American Society for Testing and Materials

ASTM

In Plain English

The organization that publishes the technical standards for testing and specifying construction materials.

Definition

ASTM International (formerly the American Society for Testing and Materials) is a global standards organization that develops and publishes technical standards for materials, products, systems, and services across many industries. In construction, ASTM standards govern testing procedures, material specifications, and performance requirements for concrete, steel, wood, masonry, roofing, and dozens of other materials. Specifications routinely cite ASTM standards by designation (e.g., ASTM A615 for deformed rebar, ASTM C150 for Portland cement).

Why It Matters in Bidding

ASTM designations in a spec are not boilerplate; they dictate exactly which material grade, test, and submittal an estimator must price, so reading them wrong can mean bidding a cheaper product that gets rejected at submittal review. Because compliance is verified through testing and certs, ASTM references also carry quality-control labor and lab costs that belong in the bid rather than as a surprise later.

Example

The estimator caught that the spec required ASTM A706 weldable rebar rather than the more common A615 and priced the higher-cost bar plus mill certs before it became a costly substitution after award.

Related Terms

ACI (American Concrete Institute)AISC (American Institute of Steel Construction)CSI (Construction Specifications Institute)

Frequently Asked Questions

Citing an ASTM designation gives an unambiguous, enforceable definition of the material grade, dimensions, and test methods required, so bidders price the same product and inspectors can verify compliance. It replaces vague descriptions with a recognized benchmark, reducing disputes over whether delivered material meets the intent of the drawings and specifications.
A higher or more specialized ASTM grade often costs more, requires specific suppliers, and may demand mill certifications or field testing that add labor and lab fees. Estimators must match the takeoff to the exact designation cited; assuming a common grade when a premium one is specified creates a gap that surfaces painfully at submittal.
The architect or owner can reject it, forcing removal, reordering, and schedule delay, with the cost typically falling on the contractor who supplied non-conforming material. That is why estimators confirm the designation during bidding and require suppliers to furnish certified test reports proving the product meets the cited standard before it ships.

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