Advantages of a metal door

A hollow metal door (commonly of the flush type), is one fabricated of sheet steel and reinforced by light metal channels; has a hollow core, sometimes filled with a light filler material.

These types of doors are commonly used as a passive means of protecting people and property from fires in commercial facilities such as schools, industrial plants, hospitals, government facilities and office buildings to name a few.

Using a hollow metal door has many advantages such as:

  • Fire retardant
  • Weather resistant
  • Durable / great for long term use
  • Environmentally friendly
  • Designed to fit nearly every application
  • Rugged
  • Less transport cost compared to Wooden doors
  • Termite/Insect resistant
  • Low maintenance/repair cost

Fire Rated Doors

Fire Rated Doors are a type of hollow metal door which prevents the spread of fire, smoke, toxic fumes and gases. These doors are a part of an assembly which includes the wall, door and frame specifically manufactured for this purpose. Being Fire Rated typically means the duration for which the door can withstand a standard fire resistance test. We’ve provided a list of UL codes and associated standards:

Other requirements

  • Uses rated fire door hardware
  • Steel hinges (to ensure the door will not come loose from the frame and fall out of the opening)
  • Must be self-closing and self-latching

NFPA 80 provides specific guidance on what can and cannot be done to a rated door. When adding a new door or repairing your existing door we ensure that all new components have a label matching the rating of the existing door and frame. We also can provide pre and post repairs to insure that your facility passes its yearly fire inspection.

UL CodeRating (Resistance Time)Maximum Glass Area Use
A*180 min100 square inches per leaf Firelite glass only / No dimension to exceed 33”openings in walls separating buildings that are joined together
B*90 min100 square inches per leafstairwell doors but are sometimes used at all the rated walls in a building
C*45 min1296 square inches per light. No dimension to exceed 54”.openings from a corridor into another room in the same building
D90 minMust check local jurisdiction for standardsexterior doors that are subject to fire hazards from the outside of the door
E45 min 1296 square inches per light. No dimension to exceed 54”.exterior doors that are subject to fire hazards from the outside of the door
20 min1296 square inches per light. No dimension to exceed 54”.
SSMOKE

*most commonly used

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