What is the required fire rating for exposed supports of above ground tanks?

The required fire rating for exposed supports of above ground tanks is a critical consideration to ensure structural integrity and safety in the event of a fire. A fire rating of 2 hours is often mandated for these supports to provide adequate protection against potential fire exposure. This rating helps to prevent the failure of the support structure during a fire, which could lead to catastrophic consequences, including the release of flammable materials or the collapse of the tank itself.

A fire rating of this duration reflects the need for significant resistance to fire, allowing enough time for emergency response measures to be implemented and minimizing the risk of ignition or explosion. Therefore, the 2-hour fire rating is intended to ensure that the supports can withstand the heat and potential damage for a sufficient time frame, protecting both public safety and surrounding properties.