Is IS 11525:1986 still a valid standard?

No, it has been withdrawn by BIS and should not be used for new procurement or design.

What types of chairs does this standard cover?

It covers three types of wooden office chairs: Typist's chair, Junior Executive's chair, and Senior Executive's chair.

What is the maximum permissible moisture content for the wood used?

The moisture content should not exceed 12 percent (Clause 4.1).

What is the static load test requirement for the seat?

The seat must withstand a static load of 1300 N applied 10 times without any breakage or permanent deformation (Table 2).

IS 11525

: 1986

wooden chairs for office purposes

CurrentSpecializedSpecificationArchitectural · Furniture

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This standard specifies the material, dimensional, constructional, and performance requirements for various types of wooden chairs intended for office use. It covers three types: typist's, junior executive's, and senior executive's chairs, and outlines tests for stability, strength, and durability.

wooden chairs for office purposes

Quick Reference Values

Maximum moisture content of wood12 %

Seat height (Typist's chair)430 to 580 mm

Backwards overturning minimum force200 N

Seat static load test1300 N for 10 cycles

Back static load test560 N for 10 cycles

Arm rest downward static load test900 N

Practical Notes

This standard has been officially withdrawn by the Bureau of Indian Standards (BIS).

For current office chair requirements, refer to newer standards like IS 16952:2021 (Office Furniture — Office Work Chair — Test Methods).

This code serves as a historical reference for older furniture designs and procurement specifications.