Fire Damper Access Door Size

O where the size of the duct permits access doors should be at least 18 inches x 16 inches in size.

Fire damper access door size.

Access doors are designed to provide entry to ductwork to access fire products. With over 50 years of experience in the hvac industry we have inspected thousands of fire and smoke dampers. The non fire rated doors come hinged or double cammed galvanized or stainless steel and can be made square rectangular or round. Over the years we discovered many deficiencies with small damper access openings.

We manufacture both non fire rated doors as well as a 1 5 hour fire rated access door. Double skinned 24 g galvanised door panel. The minimum access door should be 18 by 16 inches 457 by 406 mm when duct size permits. 22g galvanised steel flanged frame for strength.

Ruskin has a wide variety of doors to meet different duct styles and application needs. For dampers that are too large for an ordinary person s arm to reach from the outside of the duct to reset the damper and replace the link the access size should be 24 by 16 inches 610 by 406 mm to allow a person to enter the duct. 1 inch thick insulation. They were always way too small to perform meaningful inspections maintenance was next to impossible and the edges were often sharp and unsafe.