Fire Damper Access Door Location

Install in accordance with the manufacturer s installation instructions in fire resis tance rated floor ceiling or roof ceiling assemblies.

Fire damper access door location.

Ul 555 is the test standard for fire dampers. Dampers equipped with fusible links internal operators or both shall be provided with an access door or. Install as shown in figure 1 a. Fire dampers are ul555 tested and labeled devices installed in ducts and air transfer openings or air distribution systems designed to close upon the detection of heat.

Mounting angles must overlap opening 1 in. Fire dampers are passive fire protection products used in heating ventilation and air conditioning hvac ducts to prevent the spread of fire inside the ductwork through fire resistance rated walls and floors. Access door or panel a. Lloyd industries has been an active manufacturer of access doors fire and smoke dampers and h v a c.

We manufacture both non fire rated doors as well as a 1 5 hour fire rated access door. O the doors should be located as close as practicable to the dampers. Damper fsd ceiling fire radiation damper. The non fire rated doors come hinged or double cammed galvanized or stainless steel and can be made square rectangular or round.

When a rise in temperature occurs the fire damper. Store in an orderly manner at a safe location away from construction traffic material etc. Ul 555s is the test standard for smoke dampers. Access doors are designed to provide entry to ductwork to access fire products.

All ul listed dampers are tested according to ul test standards. With over 50 years of experience in the hvac industry we have inspected thousands of fire and smoke dampers. Fire dampers installation instructions. Has provided underwriters laboratory approved fire dampers as well as other essential products for the h v a c.

Fire smoke dampers are similar to fire dampers in fire resistance rating and also prevent the spread of smoke inside the ducts. The duct the access doors should be increased to at least 24 inches x 16 inches in size to allow a person to enter the duct. Combination fire smoke dampers must meet the test requirements for both ul test standards. Over the years we discovered many deficiencies with small damper access openings.

They were always way too small to perform meaningful inspections maintenance was next to impossible and the edges were often sharp and unsafe. Since the development of modern fire damper protection equipment lloyd industries inc.