Project Delivery

AHJ

Also called: Authority Having Jurisdiction

The local official or agency — building department, fire marshal, electrical inspector — with authority to interpret and enforce code on a given project.

Code is national; enforcement is local. The AHJ decides how a requirement applies to your building, and interpretations genuinely differ between neighbouring jurisdictions — something that matters across Miami-Dade, Broward, and Palm Beach, where permitting practice and inspection expectations for low-voltage and fire-alarm interfaces are not identical.

Engaging early is cheaper than appealing later. Confirming maglock release requirements, permit scope, and inspection sequencing with the AHJ before install avoids the worst outcome in this trade: a system that works but cannot pass inspection.

Related terms

Fail-Safe vs Fail-Secure: Two electric lock behaviours on power loss: fail-safe unlocks, fail-secure stays locked. Which is correct depends on egress code and the door's role.
Firestopping: Sealing cable penetrations through rated walls and floors with tested assemblies so the barrier's fire rating is restored.
Division 27 / 28: The CSI MasterFormat sections covering low-voltage work: Division 27 is communications — cabling, AV, paging — and Division 28 is electronic safety and security, including access control and surveillance.
Plenum-Rated Cable: Cable with a fire-resistant, low-smoke jacket required by code in air-handling plenum spaces — typically the void above a suspended ceiling used for return air.

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