IS 3614:2017 is the Indian Standard (BIS) for fire resisting doors. This standard lays down the specifications, material requirements, and performance criteria for fire-resisting doors. It ensures that doors provide the necessary integrity and insulation to compartmentalize fires and secure safe egress routes.
Lays down requirements for the design, materials, construction, and testing of fire resisting doors for various applications.
Key reference values — verify against the current code edition / project specification.
| Reference | Value | Clause |
|---|---|---|
| Rating criteria | Integrity (E) + Insulation (I), time-based | Rating |
| Common ratings | 30 / 60 / 90 / 120 minutes | Classes |
| Required rating | Set by NBC 2016 Part 4 by opening role | NBC |
| Assembly rating | Leaf+frame+seals+hardware tested together (not leaf) | Critical |
| Mandatory | Self-closer + positive latch + intumescent/smoke seals | Hardware |
| Voids rating | Any site modification (louvre, vision panel, hinges) | Caution |
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
IS 3614:2017 is the specification for fire-resisting doors / fire-check & fire-resisting door assemblies — the rated door sets that maintain compartmentation in a fire (stairwell, lobby, refuge-area, shaft and separating-wall doors). It is a life-safety product code: a fire door is only as good as its *tested, rated assembly*.
It is read with the fire & life-safety stack:
A fire door is specified by its fire-resistance rating — the duration it goes on satisfying the furnace-test criteria:
The single most important concept: a fire door performs only as the complete certified assembly, correctly installed and self-closing — a rated leaf in a non-rated frame with no closer is not a fire door.
Scenario: door from a lobby into a protected escape staircase in a high-rise.
Step 1 — required rating: read NBC 2016 Part 4 for the opening's role → it stipulates the minimum rating (e.g. 120 min for the staircase enclosure / 60–120 min per occupancy & height).
**Step 2 — specify the *assembly*: an IS 3614 door set tested & certified as a complete assembly to that rating — leaf, frame, intumescent + smoke seals, fire-rated vision glazing, fire-rated hinges, lock/latch, and a self-closing device**; demand the test/certification report for the *as-supplied* configuration.
Step 3 — installation: fixed exactly per the certified detail (frame fixing, gap tolerances, seal positions) — site modifications (extra louvre, oversized vision panel, removed closer) void the rating.
Step 4 — hardware: self-closer functions and the door positively latches (an unlatched fire door blows open under fire pressure); no hold-open unless on a fire-alarm-released device.
Step 5 — acceptance: verify certification, installed gaps/seals, and closer/latch operation — record it. A 'fire door' without assembly certification and a working closer is non-compliant.
1. Specifying a rated leaf, not a rated assembly. The rating belongs to the *whole tested set* (leaf+frame+seals+hardware) — mixing a rated leaf with a random frame/hardware is not a fire door.
2. No self-closing device / no positive latch. A fire door propped or unlatched provides zero compartmentation — the closer and latch are functional requirements, not accessories.
3. Site modifications. Adding louvres, enlarging vision panels, planing the leaf, or changing hinges/locks voids the certified rating.
4. Wrong rating for the opening. Using a 30-min door where NBC requires 120-min (or vice-versa) — the required rating comes from NBC Part 4 by the door's role.
5. No certification / installation check. Accepting on a sticker without the assembly test report and an installed gap/seal/closer inspection.
IS 3614:2017 is a current revision and is the controlling product code for rated doors, applied through NBC 2016 Part 4, which is what actually mandates *where* and *what rating* of fire door is required. The professional non-negotiable: a fire door is a certified assembly that is correctly installed and self-closing — the overwhelming majority of in-service fire-door failures are not material failures but *propped-open, unlatched, site-modified, or non-assembly* doors that defeat compartmentation entirely.
The practitioner contract: take the required rating from NBC Part 4 by opening role, procure a fully certified IS 3614 assembly (with the test report for the as-supplied configuration), install strictly to the certified detail, and acceptance-check the closer, latch, gaps and seals — then maintain them (fire doors are an inspectable life-safety item, not fit-and-forget). A correctly specified and maintained IS 3614 assembly is the difference between a contained fire and a fatal stairwell.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Test Furnace Pressure Regime | Neutral pressure plane typically at or above mid-height (similar to ISO 834). | Neutral pressure plane at 1m (40 inches) above the sill (positive pressure test). | UL 10C:2016 |
| Unexposed Face Temperature Rise Limit (Insulation) | Average rise 140°C, any point 180°C above ambient. | Average rise 140°C, any point 180°C above ambient (for 'I' classification). | BS EN 1634-1:2014 |
| Fire Resistance Rating Denomination (Common) | Expressed in minutes (e.g., 30, 60, 120, 240 minutes). | Expressed in hours or minutes (e.g., 3/4 hour, 1 hour, 1 1/2 hour, 3 hour). | NFPA 80:2022 (referencing UL 10C / ASTM E152) |
| Hose Stream Test Requirement | Not a mandatory universal requirement for all ratings. | Required for fire door assemblies rated 60 minutes or more. | UL 10C:2016 / NFPA 80:2022 |
| Integrity Failure Criterion (Gauges) | Cotton pad ignition and penetration by gap gauge (typically 6mm and 25mm diameter). | Cotton pad ignition and penetration by gap gauges (6mm or 25mm diameter depending on test duration and specific conditions). | BS EN 1634-1:2014 |
| Self-closing Device Requirement | Mandatory for fire doors to ensure automatic closure and latching. | Mandatory, explicitly part of 'C' classification in EN standards (e.g., EN 13501-2 C5) and generally required by NFPA 80. | BS EN 1634-1:2014, NFPA 80:2022 |