What is a common requirement for fire extinguishers installed in commercial buildings?

The requirement for fire extinguishers in commercial buildings to be inspected monthly is vital for ensuring that they are functional and ready for use in an emergency. Regular inspections help identify any issues, such as missing or damaged extinguishers, insufficient pressure, or obstructions that might impede access. By adhering to this monthly inspection routine, businesses can maintain compliance with safety regulations and provide a safer environment for employees and visitors.

Other options present different requirements, but these do not align with standard inspection practices. Some may suggest certain mounting heights or recharging frequencies, but they do not encapsulate the critical ongoing maintenance steps reflected in the correct answer. The focus on monthly inspections emphasizes the commitment to fire safety and readiness in commercial settings.