Platforms used for access to aboveground tanks storing flammable or combustible liquids are regulated by 2021 IFC, Section 5704 – Storage of Flammable and Combustible Liquids.
IFC 5704.2.7.4 – Access to Aboveground Tanks:
"Platforms, ladders, and stairways providing access to aboveground tanks storing flammable or combustible liquids shall be of noncombustible construction."
This ensures that in case of fire, the access structures do not contribute to the spread of flames.
Why Other Options Are Incorrect?
A. At least 4 ft. wide. – The IFC does not specify a required width for platforms.
C. Built of nonferrous, nonsparking metal. – While important in hazardous areas, this is not a general requirement for platforms accessing aboveground tanks.
D. Located no closer than 3 ft. to the side of the tank. – There is no specific 3-ft. clearance requirement in the IFC for platforms.
✅ Correct Answer: B. Built of noncombustible construction.
