Smoke Control System Functional Testing JHA (Job Hazard Analysis / Activity Hazard Analysis)
Updated 2026-06-23
A Smoke Control System Functional Testing JHA (Job Hazard Analysis / Activity Hazard Analysis) is the plan that keeps the crew functionally testing a smoke control system safe from the activated equipment and airflow, from coordination failures, and from the access work. Smoke control system functional testing activates and verifies the fans, dampers, and pressurization that control smoke in a fire — combining the activated-equipment and airflow hazard, the coordination hazard, and the access hazard. This guide walks through building a Smoke Control System Functional Testing JHA that names the activated-equipment/airflow, coordination, and access hazards and assigns the equipment, coordination, and access controls that hold up in the field.
Why smoke control system functional testing needs its own JHA
Smoke control system functional testing activates and verifies the smoke control system — the smoke-control/ exhaust fans, smoke/fire dampers, stairwell and elevator pressurization, and their controls — confirming that, on a fire signal, the system moves air correctly to control smoke (exhausting smoke zones, pressurizing egress paths) per the smoke-control design. The defining feature is that the test activates powerful fans and dampers and creates significant airflow and pressure differences. The hazards combine the activated-equipment and airflow (the test activates powerful smoke-control/exhaust fans and moves dampers — the fans (rotating, powerful), the moving dampers, and the significant airflow and pressure differences created (high-velocity air, door-opening forces from pressurization, and the airflow itself)), the coordination (the test activates the smoke-control and fire-alarm systems and moves air across the building — coordination with the fire-alarm test, occupants, and other systems is needed), the access (accessing fans, dampers, and controls — often at height, on roofs (exhaust fans), or in mechanical spaces), and the door/pressurization forces. The activated-equipment/ airflow and the coordination justify a dedicated JHA.
Breaking smoke control system functional testing into steps
The steps for a Smoke Control System Functional Testing JHA follow the test:
- Coordinate with the fire-alarm test, occupants, and systems
- Plan the smoke-control sequences to test
- Activate the smoke-control system (fans, dampers, pressurization)
- Verify the airflow, pressurization, and damper operation
- Manage the activated-equipment, coordination, and access hazards
- Measure the airflow/pressure differences
- Restore the systems to normal
- Report the results
Each step carries a hazard, and the activated-equipment/airflow, the coordination, and the access are where the most significant risks concentrate.
The hazards step by step
Activated-equipment and airflow
The test activates powerful smoke-control/exhaust fans and moves dampers — the fans (rotating, powerful), the moving dampers, and the significant airflow and pressure differences created (high-velocity air at exhaust/ intake points, door-opening forces from pressurization, and the airflow itself). The controls are awareness of and clearing hazard zones around the activated equipment (clear of moving dampers, fan intakes/discharges, and high-velocity airflow), managing the door/pressurization forces (doors can be forced open/held shut by pressurization — a struck/pinch hazard), keeping clear of rotating fans, communicating before activating, and the equipment/airflow controls. The activated-equipment/airflow is a defining hazard — the test creates powerful air movement and moves equipment. (These follow the equipment-motion and airflow fundamentals.)
Coordination
The test activates the smoke-control and fire-alarm systems and moves air across the building — coordination with the fire-alarm test, occupants, and other systems is needed (the smoke-control test is usually part of, or coordinated with, the fire-alarm cause-and-effect test). The controls are coordinating with the fire-alarm test and monitoring station (on test), notifying occupants, coordinating with other building systems, clear communication, restoring/notifying at completion, and the coordination controls. The coordination is a defining hazard. (These follow the fire-systems coordination fundamentals.)
Access
Accessing fans, dampers, and controls — often at height, on roofs (exhaust fans), or in mechanical spaces — brings the access hazards. The controls are safe access (roof access and fall protection for roof fans, stable ladders/lifts, fall protection where at height), managing the mechanical-space access, and the access controls. (These follow the working-at-height and roof-access fundamentals.)
Door/pressurization forces
The door/pressurization forces (pressurization creates door-opening forces) carry the door hazard. The controls are awareness of the door forces (pressurized doors can be hard to open or can swing), managing the door forces during testing, and the door controls. (These follow the pressurization fundamentals.)
A simple Smoke Control System Functional Testing JHA structure
| Step | Hazard | Control | Standard |
|---|---|---|---|
| Coordinate | Fire alarm / systems | Coordinate with fire-alarm test, occupants, systems | NFPA 92 |
| Plan sequences | Test scope | Plan smoke-control sequences to test | NFPA 92 |
| Activate system | Fans / dampers / airflow | Clear hazard zones, keep clear of fans/dampers/airflow | NFPA 92 |
| Verify airflow | Pressurization forces | Verify airflow/pressurization, manage door forces | NFPA 92 |
| Measure | Airflow / pressure | Measure airflow and pressure differences | NFPA 92 |
| Restore | Systems offline | Restore systems to normal, notify completion | NFPA 92 |
Activated-equipment/airflow control and coordination
A Smoke Control System Functional Testing JHA centers on activated-equipment/airflow control and coordination. The activated-equipment/airflow control addresses the powerful fans, moving dampers, and significant airflow — controlled by clearing hazard zones around the activated equipment (clear of moving dampers, fan intakes/ discharges, high-velocity airflow), managing the door/pressurization forces, keeping clear of rotating fans, and communicating before activating. The coordination addresses the smoke-control and fire-alarm activation — controlled by coordinating with the fire-alarm test and monitoring station, notifying occupants, and restoring/notifying at completion. And the fans/dampers get safe-access controls. A JHA built on activated-equipment/airflow control and coordination, with access controls, addresses the hazards that define smoke control system functional testing.
From the field: what actually goes wrong
In fourteen years across federal, heavy civil, and industrial projects, smoke control system functional testing is like fire-alarm cause-and-effect testing but centered on air movement, and the defining hazard is the powerful equipment and airflow the test activates. When the smoke-control system is triggered, it does exactly what it is designed to do in a fire: powerful smoke-control and exhaust fans start, smoke and fire dampers move, and stairwell and elevator pressurization systems create significant pressure differences — all at once. That creates several hazards: the rotating powerful fans (keep clear of intakes and discharges), the moving dampers (struck/pinch), the high-velocity airflow at exhaust and intake points, and — a specific one — the door/pressurization forces, because pressurization makes doors hard to open or can swing them, a struck and pinch hazard. So clearing the hazard zones around the activated equipment before triggering, managing the door and pressurization forces, keeping clear of rotating fans, and communicating before activating are the controls. The building's air-moving systems all coming on together is a genuinely energetic event.
The coordination and the access are the other defining hazards. On the projects I have run, the smoke-control test activates the smoke-control and fire-alarm systems and moves air across the building, so it is usually coordinated with (or part of) the fire-alarm cause-and-effect test — meaning coordination with the fire-alarm test and monitoring station (on test), notifying occupants, coordinating with other building systems, and restoring and notifying at completion are the controls. The access is significant because smoke-control and exhaust fans are often on the roof and dampers are in the ductwork and mechanical spaces — so roof access and fall protection for roof fans, safe access to dampers, and managing the mechanical-space access apply. The door/pressurization forces round it out. The JHA built on activated-equipment/airflow control and coordination is the one that protects the smoke-control-testing crew.
The bottom line
A Smoke Control System Functional Testing JHA names the activated-equipment/airflow, the coordination, and the access hazards with specific controls — clearing hazard zones around the fans, dampers, and airflow and managing door/pressurization forces for the activated equipment, coordinating with the fire-alarm test and occupants for the coordination, and safe roof/mechanical-space access for the fans and dampers. The activated-equipment/airflow and the coordination are the defining concerns. The JHA that manages both is the one that protects the crew.
Frequently asked questions
Why is the activated equipment and airflow a defining hazard?
The test activates the smoke-control system to do what it does in a fire — powerful fans start, dampers move, and pressurization creates significant pressure differences, all at once — creating hazards from the rotating fans, moving dampers, high-velocity airflow, and door/pressurization forces. Controls are clearing hazard zones around the activated equipment (clear of moving dampers, fan intakes/discharges, high-velocity airflow), managing door/pressurization forces, keeping clear of rotating fans, and communicating before activating.
Why do door and pressurization forces matter?
Smoke-control pressurization creates pressure differences that make doors hard to open or can swing them forcefully — a struck and pinch hazard for anyone at a pressurized door during the test. Controls are awareness of the door forces (pressurized doors can be hard to open or can swing), managing the door forces during testing, keeping clear of pressurized doors during activation, and the door controls.
Why is coordination with the fire-alarm test needed?
Smoke-control functional testing activates the smoke-control and fire-alarm systems and moves air across the building, and it is usually coordinated with (or part of) the fire-alarm cause-and-effect test — so without coordination, the test causes unnecessary alarms, emergency response, and conflicts with other systems. Controls are coordinating with the fire-alarm test and monitoring station (on test), notifying occupants, coordinating with other building systems, and restoring/notifying at completion.
What access hazards apply?
Accessing the fans, dampers, and controls — often at height, on roofs (exhaust fans), or in mechanical spaces — brings the access hazards. Controls are safe access (roof access and fall protection for roof-mounted fans, stable ladders/lifts, fall protection where at height), managing the mechanical-space access, and the access controls, alongside the activated-equipment and airflow controls during the test.
Related JHAs
- Fire Alarm Cause-and-Effect Testing JHA — the coordinated fire-alarm testing
- Smoke Control Damper Installation JHA — the dampers tested
- Clean Agent Room Integrity Testing JHA — related fire/life-safety testing
- HVAC Duct Installation JHA — the ductwork the system moves air through
Written by Mustafa Tok, CSP, ASP, CHST — OSHA Authorized Outreach Trainer with 14+ years of international construction safety experience across federal, heavy civil, and industrial projects.