Fuel storage tanks are not required for an engine-driven generator using gas unless the structure is seismic design category which of the following?

Fuel storage tanks are not required for an engine-driven generator using gas unless the structure is seismic design category which of the following?

• A. A
• B. C, D, E, F
• C. B
• D. G

Answer: (B)

Fuel storage tanks for a gas-fueled engine-driven generator depend on how seismic risk is classified for the building. In lower seismic design categories (A and B), the likelihood that the primary gas supply will be disrupted during an earthquake is considered low enough that on-site fuel storage isn’t required. When the structure falls into higher seismic design categories (C, D, E, F), codes mandate a stored fuel source to ensure the generator can continue operating if the normal gas supply is interrupted or damaged by an earthquake. This helps maintain critical power for life safety and essential systems during and after a seismic event. The requirement thus applies to seismic design categories C through F. There is no seismic design category beyond F in this framework, and omitting the higher categories would miss the protection those scenarios require.

Fuel storage tanks for a gas-fueled engine-driven generator depend on how seismic risk is classified for the building. In lower seismic design categories (A and B), the likelihood that the primary gas supply will be disrupted during an earthquake is considered low enough that on-site fuel storage isn’t required. When the structure falls into higher seismic design categories (C, D, E, F), codes mandate a stored fuel source to ensure the generator can continue operating if the normal gas supply is interrupted or damaged by an earthquake. This helps maintain critical power for life safety and essential systems during and after a seismic event. The requirement thus applies to seismic design categories C through F. There is no seismic design category beyond F in this framework, and omitting the higher categories would miss the protection those scenarios require.