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Flammable Storage & Protection

Jul 14, 2025

FIRE ACCIDENTS ON CONSTRUCTION SITES

Fire accidents on construction sites can occur due to several scenarios. One common scenario is the improper use or mishandling of heat-generating tools and equipment. Welding torches, grinders, and cutting tools can generate sparks that ignite flammable materials if not used properly. It is important to follow our “Hot Work Permit” requirements.

Another scenario leading to fire accidents is the improper storage of flammable materials. We often use many flammable substances, such as paint, solvents, and fuels. If these materials are stored haphazardly or carelessly, their proximity to potential ignition sources can lead to fires.

The lack of fire safety equipment is another factor contributing to fire accidents. If we do not have adequate fire extinguishers, sprinkler systems, or other fire suppression systems, controlling and extinguishing fires in their initial stages becomes challenging.

Lastly, inadequate staff training on fire safety can significantly increase the risk of fire accidents on construction sites. Workers who are not trained in fire safety protocols may not know how to respond to emergencies or act appropriately to prevent fires.

ISSUES: COMMON CAUSES OF BURN-RELATED ACCIDENTS RESULTING FROM NOT STORING FLAMMABLES CORRECTLY

  • Not using approved containers

  • Not storing in flammable storage cabinets

  • Ignoring quantity limits

  • Not segregating fuels or chemicals with incompatible properties

  • Not maintaining a distance from ignition sources

  • Not regulating the temperature in fuel storage areas

  • Using improper secondary container and containment practices

  • Not utilizing outdoor storage requirements

CONSEQUENCES OF INCORRECT FLAMMABLE STORAGE

  1. Injuries and fatalities

  2. Property damage

  3. Project delays

  4. Legal and financial repercussions

REGULATIONS

OSHA Standard Subpart F

  • 1926.151(d)(6) – Clearance shall be maintained around lights and heating units to prevent ignition of combustible materials.

  • 1926.152(a)(1) – Only approved containers and portable tanks shall be used for storage and handling of flammable liquids. Approved safety cans or DOT-approved containers shall be used for handling and use of flammable liquids in quantities of 5 gallons or less.

  • 1926.152(a)(2) – Flammable liquids shall not be stored in areas used for exits, stairways, or normally used for safe passage.

  • 1926.153(j) – Storage of LPG containers: storage within buildings is prohibited.

  • 1926.152(b)(1) – No more than 25 gallons of flammable liquids shall be stored in a room outside of an approved storage cabinet. For LPG storage, see 1926.153.

  • 1926.155(h) – Definition and categories of flammable liquids.

  • 1926.153(h)(13) – Temporary heaters must be at least 6 feet from LP-Gas containers.

  • 1926.152(d)(2) – At least one 20-B rated fire extinguisher must be located 25–75 feet from any flammable liquid storage area outside.

EXAMPLE INCIDENTS

  1. Report – KGNS-TV 8, Dec. 25, 2024: Construction workers trapped inside a burning building broadcast a desperate plea for help.

  2. Report – WTVM.com, May 19, 2023: The Charlotte fire chief confirmed that two people died in Thursday’s massive SouthPark construction site fire.

WHAT YOU NEED TO KNOW

Storage Guidelines and Regulations

  • Diesel fuel is considered flammable according to OSHA Subpart F 1926.155(h).

  • Approved containers must meet regulatory standards, be clearly labeled, and be designed for the specific liquid.

  • Flammable storage cabinets are required for quantities exceeding certain limits (25 gallons outside of a cabinet).

  • Quantity limits are set by OSHA and NFPA 30.

  • Flammable materials should be segregated from incompatible substances.

  • Storage areas should be well-ventilated.

  • Keep storage areas away from ignition sources.

  • Maintain proper temperature control.

  • Use secondary containment systems.

  • Outdoor storage must maintain safe separation and access for fire control.

Specific Material Storage

  • Gasoline, paint thinner, ethanol: Store away from incompatible materials.

  • Compressed gases: Store in ventilated, secured lockers at least 20 feet from combustible materials.

Worker Training and Awareness

  • Train all personnel in safety procedures, hazards, and emergency response.

  • Review Safety Data Sheets (SDSs) regularly.

Emergency Preparedness

  • Maintain appropriate fire extinguishers near storage areas.

  • Install fire suppression systems as needed.

KEY TAKEAWAY

  • Construction sites face fire risks from tools, improper storage, lack of equipment, and inadequate training.

  • Fires cause property damage, injuries, and financial losses.

  • Control site access to reduce fire risks.

  • Train workers on proper use of heat-generating tools.

  • Implement hazard prevention, emergency response, and safe work practices.

DO’S OF FLAMMABLE STORAGE

  • Store fuels outside in contained “open air” areas.

  • Keep fuels at least 6 feet from combustible equipment.

  • Require a 20lb B extinguisher within 25 feet of fueling activity.

  • Train workers on “stop, drop, and roll.”

DON’TS OF FLAMMABLE STORAGE

  • Do not store fuels in unapproved containers.

  • Do not store fuels without proper sealing.

  • Do not store fuels in unventilated spaces.

  • Do not block exits or fire equipment.

  • Do not store reactive chemicals too close together.

  • Do not store fuels without proper labeling.

 

“Fire Protection and Prevention.” Occupational Safety and Health Administration, 29 CFR 1926 Subpart F, U.S. Department of Labor, www.osha.gov/laws-regs/regulations/standardnumber/1926/1926SubpartF.

“Construction Workers Trapped Inside Burning Building Broadcast Plea for Help.” KGNS-TV 8, 25 Dec. 2024.

“Charlotte Fire Chief Confirms Two Dead in Massive SouthPark Construction Site Fire.” WTVM.com, 19 May 2023.

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