Pallet storage may seem straightforward, but it's actually one of the most regulated aspects of warehouse safety. Wood pallets are classified as a high-hazard commodity by NFPA (National Fire Protection Association), and improper storage can result in devastating fires, code violations, and insurance issues.
NFPA 13 and FM Global guidelines set specific requirements for pallet storage. Idle pallets (not supporting product) must be stored in designated areas with appropriate sprinkler protection. The key thresholds: indoor storage of idle pallets exceeding a certain height or quantity triggers enhanced fire suppression requirements.
Stacking height matters. Most fire codes allow empty pallets to be stacked no higher than 6 feet without enhanced sprinkler protection. Above 6 feet, your facility may need Early Suppression Fast Response (ESFR) sprinklers or in-rack sprinkler systems. Always check your local fire marshal's requirements.
Outdoor storage has its own rules. Pallets stored outdoors should be at least 20 feet from any building and arranged in stacks no larger than 50 feet by 150 feet with a maximum height of 16 feet. Fire lanes of at least 8 feet must be maintained between stacks.
Best practices for safe pallet storage: stack pallets evenly and squarely to prevent toppling; limit indoor stacks to 6 feet unless you have enhanced suppression; keep pallets away from ignition sources, electrical panels, and exits; maintain clear access for fire suppression equipment; and conduct regular inspections of storage areas.
One often-overlooked risk: pallet storage areas should be included in your facility's hot work permit program. Welding, grinding, or cutting anywhere near stored pallets creates extreme fire risk.
At Riverside Pallet Co., our just-in-time delivery programs help warehouses minimize idle pallet inventory — reducing both fire risk and floor space consumption. Less stored inventory means a safer facility.