JHA for Welding and Hot Work

Welding, cutting, grinding, brazing, soldering — anything that produces heat, sparks, or open flame is hot work. Hot work has two hazard streams: the burn / fume / arc exposure to the welder, and the fire ignition risk to everything within 35 feet of the spark zone. A defensible hot work JHA covers both, ties to a hot work permit, and specifies a fire watch.

The standards that drive a hot work JHA

• 29 CFR 1926 Subpart J (1926.350–354) — Welding and cutting (construction).
• 29 CFR 1910 Subpart Q (1910.252) — General requirements for welding, cutting, brazing (general industry, applied widely in construction by reference).
• 29 CFR 1910.146 — Confined space (when hot work in a permit space).
• 29 CFR 1910.134 — Respiratory protection (welding fume).
• NFPA 51B — Standard for Fire Prevention During Welding, Cutting, and Other Hot Work.
• NFPA 70E — Where energized work is part of the hot work activity.

The hot work permit

NFPA 51B and most facility owner safety programs require a hot work permit before any cutting, welding, or grinding outside a designated hot work area. The permit:

• Identifies the location, the work, the worker, and the time window
• Confirms combustibles within 35 ft have been removed or shielded
• Confirms a fire watch is in place
• Confirms a fire extinguisher is on hand
• Sets the fire watch duration (30 min minimum after work stops; 60 min if elevated risk)
• Is signed by an authorized person, posted at the work location, and closed out at end of shift

The JHA should reference the hot work permit explicitly. "Hot work permit attached" or "Permit #_____ issued and posted."

Job steps and hazards

1. Pre-work fire risk survey. Hazard: ignition of nearby combustibles. Controls: 35 ft clear zone, flammable removed or shielded, floor openings sealed, drains covered.
2. Issue hot work permit. Hazard: unauthorized work. Controls: permit signed and posted.
3. Assign fire watch. Hazard: undetected ignition. Controls: trained fire watch present during work and 30 min after; extinguisher in hand; communication with welder.
4. Ventilation check. Hazard: welding fume inhalation. Controls: local exhaust ventilation at source; general dilution if LEV not feasible; supplied-air respirator for galvanized, painted, coated, or stainless work.
5. Set up shielding / curtains. Hazard: UV exposure to others, slag splatter. Controls: welding curtains, signage, exclusion zone.
6. Inspect equipment. Hazard: defective leads, regulators, hoses. Controls: pre-use inspection, frayed cables tagged out, gas hoses checked for cuts.
7. Strike arc / cut / weld. Hazard: burns, eye damage (arc eye), electric shock from leads. Controls: appropriate shade auto-darkening helmet, leather jacket and gauntlets, dry insulated boots, dry conditions.
8. Cool down and inspect work area. Hazard: hot metal contact, delayed ignition. Controls: leave work area cool, fire watch continues 30 min minimum.
9. Close permit, demobilize. Hazard: hot slag in concealed area. Controls: post-work check of voids, ducts, conduit penetrations.

PPE for hot work

• Welding helmet, auto-darkening, shade matched to process (shade 10–14 typical for arc; shade 5–6 for cutting)
• Safety glasses Z87.1 under helmet
• Leather jacket, sleeves, apron — flame-resistant
• Leather gauntlets
• Dry leather boots
• Hearing protection (grinding >85 dBA)
• Respirator — N95 minimum for mild steel, P100 or supplied air for galvanized, coated, stainless, or in confined space
• Where energized work overlaps: AR PPE per NFPA 70E

Welding fume — the under-controlled hazard

Welding fume contains metal oxides, ozone, and (for coated or galvanized stock) heavy metal compounds. OSHA enforces 1910.1000 air contaminant limits and the general PPE standard for fume exposure. The default is LEV at the source. The fallback is supplied-air respirator. The wrong answer is "open the door."

For hexavalent chromium (stainless), the JHA must reference 1910.1026 — separate written exposure control plan required.

Hot work in confined spaces

If the welding is inside a confined space, the permit-required confined space provisions of 1910.146 apply on top of the hot work permit. Atmosphere tested before entry and continuously during; ventilation continuous; attendant outside; rescue plan in place.

Build a hot work JHA in Riskora

Riskora's welding / hot work JHA template includes the Subpart J references, the hot work permit checklist, fire watch sign-off block, and ventilation decision tree. Edit for your process (arc, MIG, TIG, oxy-fuel, plasma) and material; the hazard library covers the standard exposures.

Related: JHA generator · JHA for electrical work · JHA form fields