What does a fire rating of 'EI 120' mean?

It means the door assembly prevents the passage of flames (Integrity 'E') and limits the temperature rise on the non-fire side (Insulation 'I') for a minimum of 120 minutes when tested.

Can I install a glass vision panel in a fire door?

Yes, provided the glass and its glazing system have been tested and certified as part of that specific fire door assembly (Clause 4.5).

What is the difference between this code and IS 3614?

IS 16568 is a modern, comprehensive standard harmonized with international norms (like EN standards). It specifies performance criteria (E, I, W) for the entire assembly, whereas IS 3614 was an older, more prescriptive standard.

Is a door closer mandatory on a fire door?

Yes, any hinged or pivoted fire door must be fitted with a self-closing device to ensure it is closed during a fire (Clause 4.6.4).

IS 16568 Part 1

: 2019

Fire Resistant Door and Shutter Assemblies - General Requirements

CurrentEssentialSpecificationBIMFire Safety · Fire Safety

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This standard specifies the requirements for materials, construction, performance, installation, and labeling of fire resistant door and shutter assemblies. It classifies assemblies based on their fire resistance duration (e.g., 60, 120 minutes) and performance criteria like integrity (E), insulation (I), and radiation (W).

Specifies general requirements for the design, construction, and performance of fire resistant door and shutter assemblies.

Quick Reference Values

Fire Resistance Classes (minutes)30, 60, 90, 120, 180, 240

Performance Criteria NotationE (Integrity), I (Insulation), W (Radiation)

Maximum permitted gap between leaf and frame (un-latched)3 mm

Maximum permitted gap at threshold20 mm (may be reduced based on smoke control requirements)

Door leaf thickness tolerance± 2 mm

Door leaf width/height tolerance± 3 mm

Practical Notes

The fire rating applies to the complete assembly (leaf, frame, hardware, seals). Any unapproved substitution of components on site voids the certification.

Correct installation as per Clause 9 is critical for performance. A certified doorset installed incorrectly will fail in a fire.

The label (Clause 7) is the primary proof of compliance. It must be permanently fixed and legible, containing manufacturer details, fire rating, and a unique serial number.