Wooden fireproof door is also important part for each kind of projects like hospitality like hotel, resort, branded residence, or commercial building like government or private office etc. Below is the rough standard for reference.
1. Classification (Core basis: Fire resistance rating):
- Class A fire door: Fire resistance rating ≥ 1.50 hours. This is the highest grade of fire door.
- Class B fire door: Fire resistance rating ≥ 1.00 hour. This is one of the most commonly used grades.
- Class C fire door: Fire resistance rating ≥ 0.50 hours. Mainly used in areas with relatively lower requirements.
2. Application Scenarios (Based on the "Code for Fire Protection Design of Buildings" GB50016):
- Class A fire doors:
Doors installed on fire-resistant partitions or firewalls (such as partitions between different fire compartments in hotels, doors leading from important equipment rooms such as fire pump rooms and power distribution rooms to corridors).
Doors installed in evacuation corridors at fire compartment boundaries.
Doors of smoke-proof stairwells and their anterooms in high-rise buildings (usually requiring Class A).
Doors of fire elevator anterooms (usually requiring Class A).
Inspection doors of vertical shafts such as cable shafts, pipe shafts, smoke exhaust ducts, and garbage chutes (if the fire resistance rating of the shaft wall is ≥ 1.00h, Class C doors can be used; otherwise, Class A doors are required).
- Class B fire doors:
Doors of enclosed stairwells (non-high-rise or specific situations).
Doors leading to outdoor staircases.
Doors between rooms and evacuation corridors (such as hotel guest room doors leading to corridors, restaurant private room doors, etc.). This is the most common type of fire door in hotels.
Doors from anterooms (including smoke-proof stairwell anterooms, fire elevator anterooms, and shared anterooms) to evacuation corridors (sometimes may be of a different class than the stairwell doors).
Doors of ventilation and air conditioning equipment rooms (when opening into the building).
- Class C fire doors:
Inspection doors of vertical shafts such as cable shafts, pipe shafts, smoke exhaust ducts, and garbage chutes (when the fire resistance rating of the shaft wall is ≥ 1.00h).
Doors of equipment rooms in non-densely populated areas of buildings (such as non-critical storage rooms) (subject to specific code requirements).
3. Material Types:
Fire doors are mainly classified by material into:
- Steel fire doors: The most common type. The door frame and door leaf frame are made of cold-rolled steel plates, and the interior is filled with fire-resistant and heat-insulating materials (such as perlite board). Wooden Fire Doors: The door frame and door leaf frame are made of flame-retardant treated wood or flame-retardant wood composite materials, and the interior is filled with fire-resistant and heat-insulating materials. They must undergo special flame-retardant treatment and meet the corresponding fire resistance rating requirements.
- Steel-Wood Fire Doors: The door frame is made of steel, and the door leaf frame is made of flame-retardant wood or flame-retardant wood composite materials, or the door frame is made of wood/flame-retardant wood materials, and the door leaf frame is made of steel.
- Fire Doors of Other Materials: Such as stainless steel and glass fire doors (which must meet integrity and insulation requirements). Regardless of the material, they must pass national certified type testing and meet the corresponding fire resistance rating standards.
4. Key Requirements:
- Automatic Closing: Fire doors should generally be equipped with door closers to ensure automatic closing in case of fire (normally open fire doors require an electric release device for automatic closing during a fire).
- Sealing: There should be effective fire-resistant sealing strips (such as intumescent sealing strips) between the door leaf and the door frame, and between the door leaves (for double doors), which expand when heated to seal the gaps.
- Sequence Closer: Double or multi-leaf fire doors should be equipped with a sequence closer to ensure that they close in the correct order.
- Marking: Fire doors should have a permanent nameplate indicating the manufacturer, product name, model specifications, fire resistance rating, and applicable standards.
