What is the minimum gauge of metal allowed for fabricating a fire damper sleeve?

The minimum gauge of metal allowed for fabricating a fire damper sleeve is indeed determined by relevant building codes and standards, which prioritize fire safety and integrity within duct systems. Choosing gauge 26 or the same as the connecting duct ensures that the fire damper sleeve maintains structural integrity and can operate effectively during a fire event.

Using a gauge that is too thin could compromise the sleeve's ability to withstand high temperatures or the mechanical stresses it may encounter, potentially allowing for the passage of fire or smoke. Fire dampers must be robust enough to fulfill their critical function of preventing the spread of fire through ductwork, and therefore, adherence to these gauge requirements serves to enhance safety and compliance with fire protection regulations.