OSHA's construction regulations for welding and cutting are consolidated in 29 CFR Part 1926 Subpart J, the reference framework every US construction site's hot-work program is audited against. The subpart spells out the baseline federal requirements for gas welding and cutting, arc welding and cutting, fire prevention, ventilation and worker protection, and work on surfaces covered by preservative coatings.

The five sections that make up Subpart J are:

• 1926.350 - Gas welding and cleaning/cutting — governs compressed gas cylinders, regulators, hoses, manifold systems, and safe handling of fuel-gas and oxygen equipment.
• 1926.351 - Arc welding and cutting — covers equipment installation and grounding, screen and booth requirements, voltage limits, and electrode handling.
• 1926.352 - Fire prevention — establishes the rules for moving combustibles, using fire watches, and prohibiting hot work where safeguards cannot be maintained.
• 1926.353 - Ventilation and protection — requires mechanical ventilation or respirators where fumes, gases, and dust from welding, cutting, and heating can exceed safe limits.
• 1926.354 - Preservative coatings — addresses extra precautions when welding, cutting, or heating surfaces coated with highly flammable preservatives.

The subpart's authority derives from Section 107 of the Contract Work Hours and Safety Standards Act (Construction Safety Act) and Sections 4, 6, and 8 of the Occupational Safety and Health Act of 1970, along with the applicable Secretary of Labor's orders.

For 2026, contractors and safety managers continue to treat Subpart J as the floor for hot-work compliance — hot work permits, fire watch assignments, fume ventilation, and PPE programs are all mapped back to these sections, and OSHA citation prevention efforts concentrate on documentation for 1926.352 fire prevention and 1926.353 ventilation. With fume-control expectations rising industry-wide, aligning construction hot-work programs with Subpart J remains the first compliance checkpoint before layering on best practices such as job safety analyses and engineered local exhaust ventilation.