What materials are specified for the handles?

The standard covers handles made from Leaded brass (IS 292), aluminium alloys (IS 617), and zinc alloys (IS 742).

Does this standard cover the lock mechanism?

No, this standard is only for the vertical door handle. The mortice lock itself is covered by other standards like IS 2209.

What is the standard size for the square spindle that operates the handle?

The handle is designed to suit a standard 8 mm square spindle, as specified in Clause 5.1.

What are the performance tests for these handles?

The main performance tests are a durability test of 200,000 cycles and a static load test (Clause 7).

IS 4992

: 1975

Specification for door handles for mortice lock (vertical type)

CurrentSpecializedSpecificationBIMArchitectural · Builder Hardware

Download PDF BIS Portal Google

This standard specifies the requirements for materials, dimensions, manufacture, workmanship, finish, and performance testing for vertical type door handles intended for use with mortice locks. It covers various materials like brass, aluminium, and zinc alloys and their appropriate finishes.

Specification for door handles for mortice lock (vertical type)

Quick Reference Values

Square spindle size8 mm

Minimum thickness of chromium plating (Grade 1)0.3 µm

Minimum thickness of nickel plating (for brass base)5.0 µm

Durability test cycles200,000 cycles

Salt spray test duration (for zinc alloy)96 hours

Practical Notes

This code is essential for ensuring interchangeability and quality of door handles from different manufacturers. It was reaffirmed in 2017, indicating its continued relevance in the industry. The choice of material and finish as per the standard should be based on the environmental exposure conditions of the installation site.