What is the maximum force allowed for a closing lift door?

The force needed to prevent the door from closing should not exceed 150 N (Clause 8.1.3).

What is the minimum fire rating for landing doors?

The fire resistance of landing doors must be at least half of the fire resistance of the lift well enclosure, with a minimum of one hour (Clause 11.1).

What is the minimum clear opening height for a lift door?

The minimum clear height for both car and landing doors shall be 2.0 metres (Clause 5.1).

What is the maximum allowable gap between closed door panels?

The clearance between panels, or between panels and the frame, should not exceed 6 mm (Clause 9).

IS 14665 Part 2/Sec 3

: 1999

Code of Practice for Installation, Operation and Maintenance of Electric Passenger and Goods Lifts — Part 2: Constructional and Installation Requirements, Section 3: Machine Room and Pulley Room

SupersededEssentialCode of PracticeBIMMEP · Lifts, Escalators and Mechanical Handling

Superseded by IS 17462 Part 1:2020

Archive.org BIS Portal Google

This standard specifies the constructional and installation requirements for doors and gates on electric passenger and goods lifts. It focuses on critical safety features like locking mechanisms, door operation forces, dimensional clearances, and fire resistance to ensure passenger safety and reliable operation.

Specifies requirements for the design and construction of machine rooms and pulley rooms for electric lifts (commonly referenced for installations from its period).

Quick Reference Values

Minimum clear opening height2.0 m

Maximum force to prevent door closing150 N

Maximum kinetic energy of power operated doors10 J

Minimum fire resistance for landing doors1 hour (or half of shaft's fire resistance)

Minimum dimension of vision panel clear area60 mm

Maximum gap between closed door panels or door and frame6 mm

Practical Notes

Ensuring the correct functioning of the door locking mechanism (interlock) is the single most critical safety check during installation and maintenance.

Verification of the fire rating for landing doors must align with the building's overall fire strategy and the fire rating of the shaft wall, as specified in the National Building Code.

The door reopening device (light curtain or safety edge) must be tested across its full height to ensure it detects small obstructions, not just at a single point.