FHD3R – Three hour fire rating


MAXAMs Model FHD3R fire rated floor doors is tested for a three hour fire rating. Model FHD3R controls the transmission of heat, hot gases, and flames when installed in a rated floor-ceiling assembly with a maximum temperature rise of 250 degrees Fahrenheit (121.1 degrees Celsius) for the specified rating period.

Frame Material: 12 gauge (2.75 mm) galvanneal steel with ash gray primer
Door Material: 1/4″ (6.35 mm) Aluminum tread plate with mill finish and 14 gauge (1.99mm) galvanneal steel frame and liner with ash gray primer
Insulation: High temperature ceramic fiber insulation
Hinge: Continuous stainless steel hinge
Latch: Stainless steel slam latch operated by a stainless steel recessed turn handle topside.
Spring/Cylinder: 316 stainless steel gas spring cylinders
Self Closing Mechanism: 165 degrees Fahrenheit (74 degrees Celsius) fusible link melts during fire automatically closing door without warning by releasing gas in cylinders.
Installation Kit: Includes anchor straps for installing into concrete and screws for wood frame installations
Live Load: 150 lbs/sq ft (700 kg/sq metre)
   Minimum: 26″ x 24″ (660 mm 610 mm)
   Maximum: 42″ x 60″ (1067 mm x 1524 mm) or 48″ x 48″ (1219 mm x 1219 mm)
Clear Opening: Size width up to 30″: Width minus 12″ (305 mm) x Length
Size width over 30″: Width minus 8.25″ (210 mm) x Length
QAI (QAI Laboratories) listed and labeled to NFPA-288 for 3 hour for horizontal fire door assemblies Testing Standards: NFPA 288

Optional Features: Latches and locks, door material – see submittal for details.


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Opening Dimension (inches) – This is not a rough opening size:

Non-standard Sizes (W x H) (H = Hinge Side):

Cover – Flush:

Installation *


Self-Closing Mechanism

Additional Requests: