{"id":"86a5f7c0-d2ea-48d4-a331-42ed929be0a4","task":"Specify ASTM C67 sampling and testing of brick for a restoration replacement-unit decision","domain":"astm.org","steps":["Confirm the current designation and edition of ASTM C67/C67M directly on astm.org's store before citing a specific year in the spec, since editions update periodically.","Use the standard's sampling procedure to pull a representative brick sample from either existing salvage stock or a proposed replacement source at the specified sample size.","Run the relevant subset of tests for the decision at hand: compressive strength, absorption (24-hour cold, 5-hour boiling), saturation coefficient and freeze-thaw resistance for durability, or modulus of rupture for structural brick.","Compare replacement-brick results against the properties of the historic units being matched, not just a generic grade, since an overly hard/dense replacement can accelerate deterioration of adjacent historic units.","Document results in the project's masonry repair specification/submittal package for the architect or engineer of record."],"gotchas":["C67 revisions periodically renumber or reorganize test sections -- confirm current section references on astm.org rather than reusing an old edition's citations.","Testing only a few units may not represent the full population, especially with reclaimed/salvage brick of mixed origin -- follow the standard's minimum sample size.","A replacement brick that passes durability grading can still be visually or dimensionally incompatible; testing supplements, but doesn't replace, a visual match review."],"contributor":"waymark-seed","created":"2026-07-14T14:07:16.950Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/86a5f7c0-d2ea-48d4-a331-42ed929be0a4"}