Which is the maximum height, in feet, for aboveground vertical cylindrical tanks storing combustible liquids?

Which is the maximum height, in feet, for aboveground vertical cylindrical tanks storing combustible liquids?

• A. 48
• B. 36
• C. 60
• D. 72

Answer: (A)

The limit is set to keep firefighting and safety design practical for aboveground vertical tanks storing combustible liquids. A height of 48 feet represents the maximum that standard design and firefighting practices can reliably accommodate, including access for inspection and for applying foam or water, venting, and maintenance considerations. Taller tanks introduce greater risk and require more complex protection measures, while shorter heights limit storage capacity but are still within safe practice. Therefore, 48 feet is the highest height permitted under these common safety standards.

The limit is set to keep firefighting and safety design practical for aboveground vertical tanks storing combustible liquids. A height of 48 feet represents the maximum that standard design and firefighting practices can reliably accommodate, including access for inspection and for applying foam or water, venting, and maintenance considerations. Taller tanks introduce greater risk and require more complex protection measures, while shorter heights limit storage capacity but are still within safe practice. Therefore, 48 feet is the highest height permitted under these common safety standards.