What does 'integrity' failure mean in this test?

Integrity failure occurs if continuous flaming appears on the unexposed side for more than 10 seconds, or if gaps allow specific gauges to penetrate the assembly. (Clause 10.2)

What is the 'insulation' criteria?

Insulation is maintained as long as the average temperature on the unexposed face does not rise by more than 140°C, and no single point rises by more than 180°C. (Clause 10.3)

Which code defines the fire curve to be used?

The standard time-temperature curve for the furnace is specified in IS 3614 (Part 2), which is the base method of test for fire resistance of doors.

Does this test apply to all parts of a lift?

No, this test method is exclusively for lift landing doors and car doors to evaluate their performance as a fire barrier.

IS 14670

: 1999

Landing Doors and Car Doors for Lifts — Fire Resistance Tests

CurrentSpecializedTesting MethodBIMFire Safety · Lifts, Escalators and Mechanical Handling

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This standard specifies the method for determining the fire resistance of lift landing doors and car doors. It details the test apparatus, procedure, and performance criteria for assessing integrity and insulation when a door assembly is exposed to standardized fire conditions.

Specifies methods for determining the fire resistance of lift landing doors and car doors.

Quick Reference Values

Integrity failure gap gauge (small)6 mm diameter, must not penetrate more than 150 mm

Integrity failure gap gauge (large)25 mm diameter, must not pass through the specimen

Cotton pad ignition time30 s duration indicates integrity failure

Insulation failure (average temp rise)140 °C above initial ambient temperature on unexposed face

Insulation failure (max temp rise)180 °C above initial ambient temperature at any point on unexposed face

Furnace overpressure at door mid-height10 ± 2 Pa

Practical Notes

This code is a method of test, not a design or installation specification. The required fire rating for a specific location is determined by building codes like the National Building Code (NBC) of India.

The test evaluates the entire door assembly, including the frame, vision panels, and hardware, as it would be installed in a supporting wall.

Performance is classified based on the time (in minutes) for which the door assembly satisfies the integrity ('E') and insulation ('I') criteria, for example, E60 or EI-60.