Lightning Protection Installation JHA (Job Hazard Analysis / Activity Hazard Analysis)
Updated 2026-06-23
A Lightning Protection Installation JHA (Job Hazard Analysis / Activity Hazard Analysis) is the plan that keeps the crew installing lightning protection from falling off the roofs and high structures they work on, being caught outdoors in the lightning the system is meant to handle, or harmed by the bonding and exothermic connections. Lightning protection installation puts in the air terminals, conductors, and grounding that protect structures from lightning — rooftop and high-structure work exposed to weather, combining fall hazards, the lightning/weather exposure, and the bonding connections. This guide walks through building a Lightning Protection Installation JHA that names the roof-fall, weather, and bonding hazards and assigns the fall-protection, weather, and connection controls that hold up in the field.
Why lightning protection installation needs its own JHA
Lightning protection installation puts in the system that intercepts and safely conducts lightning to ground — air terminals (lightning rods), roof and down conductors, bonding, and grounding — on roofs, towers, stacks, and high structures. The work is on rooftops and high structures, outdoors, exposed to weather. The hazards combine the falls (rooftop and high-structure work at height, near edges — the dominant hazard), the weather exposure (the work is outdoors on high structures, exposed to lightning, wind, and weather — and working on a tall structure during a thunderstorm is an obvious, serious hazard), the bonding and exothermic connections (the connections, often exothermically welded, carry the grounding hazards), and the rooftop work hazards. The rooftop/high falls and the weather (lightning) exposure justify a dedicated JHA.
Breaking lightning protection installation into steps
The steps for a Lightning Protection Installation JHA follow the system:
- Establish fall protection for the roof and high-structure work
- Monitor the weather (lightning) before and during work
- Install the air terminals
- Route and secure the roof and down conductors
- Make the bonding and grounding connections (exothermic)
- Connect to the grounding system
- Manage fall, weather, and connection hazards
- Test and verify
Each step carries a hazard, and the rooftop/high falls and the weather (lightning) exposure are where the most serious risks concentrate.
The hazards step by step
Falls from roofs and high structures
Lightning protection is installed on roofs, towers, stacks, and high structures, at height and near edges — the dominant hazard. The controls are fall protection appropriate to the work (guardrails, personal fall arrest, the roof-work approach), safe access to roofs and high structures, managing roof edges and openings, and the appropriate fall protection for towers and high structures. (These follow the roof-work and working-at-height fundamentals.)
Weather and lightning exposure
The work is outdoors on roofs and high structures, exposed to lightning, wind, and weather — and working on a tall structure or roof during a thunderstorm is a serious, obvious hazard (the crew is at the highest point, the lightning target). The controls are monitoring the weather, ceasing work and getting off the roof or high structure when lightning threatens (the 30-30 rule or a lightning-safety plan), and managing wind and weather on the elevated work. The lightning exposure is a serious, specific hazard for this trade.
Bonding and exothermic connections
The bonding, grounding, and connections — often made by exothermic welding — carry the grounding and exothermic-welding hazards (burns, fire, the molten-metal expulsion with moisture). The controls are the exothermic-welding controls (heat PPE, dry materials, fire watch, clearing combustibles), and the mechanical-connection and bonding controls. (These follow the grounding-system fundamentals.)
Rooftop work and access
The rooftop work brings the roof hazards (edges, openings, fragile surfaces, heat), and accessing high structures is hazardous. The controls are the roof-work controls, safe access, and managing the rooftop environment.
A simple Lightning Protection Installation JHA structure
| Step | Hazard | Control | Standard |
|---|---|---|---|
| Set up fall protection | Fall from roof/structure | Fall protection per roof-work approach, manage edges | OSHA 1926.501 |
| Monitor weather | Lightning strike | Monitor weather, cease work/descend when lightning threatens | NOAA guidance |
| Install air terminals | Fall / handling | Fall protection, careful handling at height | OSHA 1926.501 |
| Make exothermic connections | Burns / fire | Heat PPE, dry materials, fire watch, clear combustibles | OSHA 1926.352 |
| Connect to grounding | Burn / electrical | Grounding-connection controls | OSHA 1926.416 |
| Rooftop work | Roof hazards | Roof-work controls, safe access | OSHA 1926.501 |
Fall protection and lightning awareness
A Lightning Protection Installation JHA centers on fall protection and lightning awareness, the two hazards that define working high and outdoors. The fall protection addresses the dominant hazard — rooftop and high-structure work at height near edges — controlled by fall protection and safe access. The lightning awareness addresses the obvious-but-critical weather hazard — the crew works at the highest point of a structure, outdoors, exposed to the very lightning the system is meant to handle, so weather is monitored and work ceases with the crew descending when lightning threatens. A JHA built on fall protection for the high work and lightning awareness for the weather exposure, with the exothermic-connection controls, addresses the hazards that define lightning protection installation.
From the field: what actually goes wrong
In fourteen years across federal, heavy civil, and industrial projects, lightning protection installation is defined by working high and outdoors, and the two hazards are the falls and, fittingly, the lightning. The falls are the dominant hazard — the work is on roofs, towers, stacks, and high structures, at height and near edges — so fall protection appropriate to the work and safe access are essential, the same discipline as any rooftop or high-structure work. The crew installing lightning protection is exposed to all the fall hazards of working at the highest points of buildings and structures.
The lightning is the hazard that is almost too on-the-nose to forget but still catches crews. The work puts the crew at the highest point of a structure, outdoors, exposed to weather — and working on a roof or tower during a thunderstorm makes the crew the lightning target. On the projects I have run, the weather is monitored, and work ceases with the crew getting off the roof or high structure when lightning threatens, following a lightning-safety plan (the 30-30 rule: seek shelter when thunder follows lightning by 30 seconds or less, wait 30 minutes after). There is a real irony in being struck by lightning while installing lightning protection, and the control is simple weather awareness and not working high during storms. The bonding connections, often exothermically welded, bring the grounding and exothermic-welding hazards (burns, fire, dry materials). The JHA that provides fall protection for the high work and lightning awareness for the weather is the one that protects the lightning protection crew.
The bottom line
A Lightning Protection Installation JHA names the roof-fall, the weather, and the bonding hazards with specific controls — fall protection and safe access for the rooftop and high-structure work, weather monitoring and ceasing work/descending when lightning threatens, and the exothermic-welding controls (heat PPE, dry materials, fire watch) for the connections. The high falls and the lightning exposure are the defining hazards. The JHA that manages both is the one that protects the crew.
Frequently asked questions
What are the fall hazards in lightning protection installation?
Lightning protection is installed on roofs, towers, stacks, and high structures, at height and near edges — the dominant hazard. Controls are fall protection appropriate to the work (guardrails, personal fall arrest, the roof-work approach), safe access to roofs and high structures, managing roof edges and openings, and appropriate fall protection for towers and high structures.
Why is lightning a hazard for this trade?
The work puts the crew at the highest point of a structure, outdoors, exposed to the very lightning the system is meant to handle — and working on a roof or tall structure during a thunderstorm makes the crew the lightning target. Controls are monitoring the weather, ceasing work and descending when lightning threatens (a lightning-safety plan like the 30-30 rule), and managing wind and weather on the elevated work.
What connection hazards does lightning protection involve?
The bonding, grounding, and connections — often made by exothermic welding — carry the grounding and exothermic-welding hazards (burns, fire, the molten-metal expulsion if moisture is present). Controls are the exothermic-welding controls (heat PPE, dry materials, fire watch, clearing combustibles) and the mechanical-connection and bonding controls.
Is rooftop work a significant part of the hazard?
Yes — much lightning protection is installed on roofs, bringing the roof hazards (edges, openings, fragile surfaces, heat) in addition to the high-structure work. Controls are the roof-work controls, safe access, fall protection, and managing the rooftop environment.
Related JHAs
- Roof Work JHA — the rooftop fall and work hazards
- Grounding System Installation JHA — the grounding and exothermic connections
- Working at Height JHA — the high-structure fall hazards
- Electrical Work JHA — the electrical bonding fundamentals
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.