Under what distance must hot work be performed away from flammable or explosive materials?

When performing hot work, such as welding, cutting, or brazing, it is crucial to ensure a safe distance is maintained from flammable or explosive materials to prevent fires or explosions. The standard distance for performing hot work activities is generally accepted to be 35 feet. This distance helps minimize the risk of sparks or heat igniting combustible materials during the operation.

Maintaining this distance allows for a buffer zone where any potential ignition sources are sufficiently far away from any flammable items. If it is not possible to maintain this distance, additional safety measures must be implemented, such as using fire-resistant barriers, covering combustibles, or employing a fire watch.

The other options reflect varying standards and regulations but 35 feet is widely recognized as an effective safeguard for protecting against fire hazards during hot work operations. Consequently, knowing to maintain a distance of 35 feet helps ensure safety in environments where these operations are performed.