Syro Industry Co., Ltd.
Home / FAQs
Q: Is there a recommended procedure for repairing fire rated doors?

Fire rated doors and frames should be repaired on a case basis to ensure compliance with fire codes. Contact us for assistance.

Q: Have the fire ratings of the doors been compromised when locksets have been removed?

Yes, every fire door must have a latching device, so you cannot remove a lock or latch from a labeled door and maintain the rating. Where a non-essential piece of hardware has been removed, the remaining holes must be filled with the same material as the door itself.

Q: Do kick plates also need to be fire rated when they installed on the bottom of the door?

Steel or stainless steel push plates and kick plates may be fitted to the doorsets provided that their fitting requires the removal of no part of the door leaf. These items of hardware are permitted up to a maximum of 20% of the door leaf area if mechanically fixed and a maximum of 30% if bonded with a contact or other thermally softening adhesive. Plates must not return around the door edges.

Q: For the convenience of building occupants, how can fire doors be held open in a code-compliant manner?

Fire doors must be closed during a fire to compartmentalize the building and prevent the spread of smoke and flames. The intent is to protect the means of egress and allow building occupants time to evacuate safely. If fire doors are blocked or wedged open, they will not be able to do their job and protect the building and its occupants.

There are acceptable ways to hold open fire doors, using electromagnetic holders, or closer/holder combinations that contain integral smoke detectors or are initiated by the fire alarm system. When smoke is detected, the doors close, and provide 20, 45, 60, 90, or 180 minutes of protection. Fire doors are sometimes referred to by a letter designation—A for three hours, B for 60 or 90 minutes, and C for 45 minutes (20-minute doors do not have a letter). However, using the number of minutes is the more common practice.

A fire door with a standard closer and no hold-open capability is called ‘self-closing,’ fire doors that close on fire alarm are ‘automatic-closing,’ and fire doors with automatic operators are called ‘power-operated fire doors.’ Doors in this last category are required by NFPA 80 to become disconnected from power upon fire alarm, so they are manually operable and cannot be held open automatically.

Q: What are the fire rated door regulations?

All components are required to adhere to product certification requirements that are acceptable to the local Authority by meeting the requirements of the local building code and fire code. The regulatory requirement will change from country to country. For example, in Australia, the National Construction Code dictates that all fire doors must be tested to certain specifications in order to meet resistance approvals and certification.

For example, in the United Kingdom a fire resisting doorset should be subjected to either a British Standard Fire Test BS 476 Part 22 1987, or a BS/EN 1634-1 2000 test. The results are recorded by the test agency and provided in a report which detail such things as constructional details, distortion data and pressure readings. The numerical fire resistance rating that is required to be installed in a particular building is provided in the Building Regulations approved Document B, or British Standards such as the BS 5588 series (e.g., 30 minutes FD30, or FD30(S) if cold smoke resistance is also required).

Similar technical guidance documents and building regulations are in effect in other countries.

Q: Any Suggested Procedure for the Selection of Swinging Fire Doors and Frames?

A. Determine the appropriate building code.

B. Check and fulfill the fire insurance company’s requirements for the specific building.

C. Basic Fire Door Requirements — Use this check list.

1. A fire door must have a label attached.

2. A fire door frame must have either an attached or an embossed label.

3. A fire door must be self-latching.

4. A fire door must be self-closing.

5. If a fire door is held open, it must be equipped with a listed heat responsive device, fusible

link or a smoke detection device.

6. A fire door must be free of any obstructions which could prevent the door from operating

properly, i.e., wedge door stops, chains, hookbacks, etc.

7. Only listed fire door hardware shall be used.

8. A fire door must have steel bearing-type hinges. (Exception: Non-bearing plain steel

hinges may be used if they are part of a listed assembly.)

9. Doors swinging in pairs that require astragals shall have at least one overlapping astragal.

Pairs of doors within a means of egress shall not be equipped with an astragal that inhibits

the free use of either leaf. A coordinator or open-back strike should be used to ensure

proper closing.

10. Fire doors with glass lights:

a. The glass frame and glazing bead must be metal.

b. The glass must be labeled wire glass not less than 1/4" thick or as permitted by the

labeling agency.

11. Fire doors with fusible link louvers:

a. Only listed louvers can be used.

b. Louvers can be furnished in 1-3/4" thick doors with a 1-1/2-hour or a 3/4-hour (no louver

and glass light combinations are permitted).

c. Maximum louver size is 24" x 24".

d. Louvers are not permitted to be installed in doors with fire exit hardware or in


D. For maximum fire protection, Standard Number 80 of the National Fire Protection Association

should be used for an installation guide.

E. Purchase doors from a recognized, responsible manufacturer whose fire doors and frames

are produced to conform to Fire Door Procedures and are subject to periodic inspections.

Q: Can I remove the fire label (tag) and replace with new one?

No. A permanent label is attached to the door panel, usually on the hinge side of doorleaf. The label should not be removed or painted over during the life of the building. If the labeled is missing, a re-certification procedure from an independent fire door certification party is required but it is always costly. 

Q: Is my fire rated door also Smoke Containment?

You might expect a tested and proven fire door to also provide smoke protection as a matter of course. Unfortunately, this is not so. If the door doesn’t have an additional smoke seal then large quantities of smoke will pass through the perimeter gaps. Tests show that the conventional stop on a fire door is a very poor smoke barrier. The clearances between the door leaf and the frame, coupled with the pressure, are the critical factors. The incorporation of an effective smoke sealing system in a door assembly will typically reduce the transfer of smoke by over 98%.

Q: Are louvers allowed on fire rated doors?

Certified fusible-link type louvers to a maximum size of 600 x 600mm are permitted in up to1.5-hour fire doors, with the louver mounted in the bottom half of the door. Doors with glass lights, or doors equipped with fire exit devices may not have louvers.