Class III standpipes are intended for use by whom?

• A. fire department personnel only
• B. both fire department personnel and building occupants
• C. building occupants only
• D. visitors

Answer: (B)

Class III standpipes are designed so both building occupants and fire department personnel can use them. They provide 1.5-inch outlets for occupant use and 2.5-inch outlets for fire department hoses. This means occupants can initiate an attack with a smaller, readily usable hose, while firefighters can connect larger-diameter hoses from the same system to deliver greater water flow and reach. The result is a system that supports both groups, not just one. The other options don’t fit because Class I is for firefighters only and Class II is for occupants only, whereas visitors aren’t the intended users of standpipes.