Fire extinguishers that weigh more than 40 pounds should be installed no more than:

The correct answer indicates that fire extinguishers weighing more than 40 pounds should be installed no more than 3½ feet above the floor. This guideline is established to ensure that heavy extinguishers are easily accessible during an emergency. Since these units are relatively heavy, placing them at a lower height allows individuals to retrieve them without straining or risking injury, which is critical in a high-stress situation where time and safety are paramount.

In fire safety regulations, the installation height for heavy fire extinguishers is designed to promote effective emergency response while adhering to safety standards. Firefighters and first responders must be able to quickly and efficiently access these tools when needed. Thus, keeping extinguishers no higher than 3½ feet strikes an appropriate balance between ensuring they are out of the way when not in use and remaining accessible when needed. This guideline supports both safety and efficacy in fire response protocols.