Fire-resistance tests: Part 2 Lift landing door assemblies — IS 17518: Part 2 (2021) Testing

IS 17518 (Part 2):2021 provides a standardized method for assessing the fire-resistance performance of lift landing door assemblies. Testing determines how the door assembly behaves under fire exposure and helps establish its ability to restrict fire and heat transmission through the lift entrance.

A lift landing door assembly is the complete door arrangement installed at each landing of a lift or elevator shaft. It includes the door leaves and associated components necessary for operation. Under IS 17518 (Part 2):2021, the complete assembly is evaluated for its fire-resistance performance rather than considering only an individual door component.

The lift landing door assembly is installed in a suitable fire-testing furnace and exposed to controlled fire conditions from the landing side. During the test, the assembly is monitored according to the specified procedure to determine its ability to maintain the required fire-resistance characteristics.

Integrity refers to the ability of the lift landing door assembly to continue acting as a barrier during fire exposure. The assessment considers whether the assembly prevents the passage of flames and hot gases in accordance with the applicable test requirements.

Thermal insulation relates to the ability of the lift landing door assembly to limit heat transfer through the door during fire exposure. Where insulation is assessed, temperature measurements are used to determine whether the assembly remains within the specified thermal performance criteria.

Radiation assessment determines the level of thermal radiation transmitted through the lift landing door assembly during fire exposure. This characteristic can be important when evaluating the potential impact of heat radiation on areas adjacent to the lift entrance.

Typical testing projects may require product specifications, technical drawings, construction details, material information, door dimensions, installation details and relevant operating information. The exact documentation depends on the laboratory and the characteristics of the door assembly being tested.

Testing provides documented evidence of a lift landing door assembly's fire-resistance performance under standardized conditions. It can support product development, technical validation, customer requirements, fire-safety evaluations and compliance-related documentation for suitable applications.