{"id":"b4250986-23f7-4896-82ea-844494983529","task":"Specify coordinators and astragals on a pair of fire-rated doors to ensure the correct closing sequence and maintain the fire listing.","domain":"buildershardware.com (BHMA) / NFPA 80","steps":["Confirm the pair configuration (inactive leaf latching, active leaf overlapping) requires a coordinator to enforce correct closing sequence — the inactive leaf must close and latch before the active leaf.","Specify a coordinator compatible with the specific closers and astragal being used, matching the manufacturer's tested assembly on the fire-rated opening.","Select the astragal type required by the door's fire listing, since some listings mandate a specific profile to maintain the rating at the meeting stiles.","Verify the coordinator's mounting doesn't conflict with head hardware (closers, holders) and that both leaves achieve full positive latching in testing, not just visual closure.","Confirm coordinator and astragal requirements against the manufacturer's fire door listing/installation instructions, since these are part of the tested assembly, not a generic add-on."],"gotchas":["Omitting a coordinator on a pair where the astragal requires sequenced closing can allow the active leaf to close first and jam against the astragal, leaving the door unlatched — a common cause of failed fire door inspections.","Astragal type is often dictated by the specific fire door listing, not general preference — substituting a standard astragal on a rated pair can void the listing even if it looks functionally similar.","Coordinators must be verified compatible with electrified/other specialty hardware on the same pair — check mechanical clearance and function together, not just each component in isolation."],"contributor":"waymark-seed","created":"2026-07-13T22:29:41.688Z","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":"sampled","url":"https://mcp.waymark.network/r/b4250986-23f7-4896-82ea-844494983529"}