What is the primary material specified for these racks?

Cold-rolled (CRCA) or hot-rolled mild steel sheets conforming to IS 513 or IS 1079.

Are the rack dimensions strictly fixed by the code?

The standard provides preferred standard dimensions for uniformity, but specific dimensions can be agreed upon between the purchaser and the manufacturer.

What type of finish is required by the standard?

A thorough anti-corrosive treatment (like phosphating) followed by a protective coating of stove enamel or powder coating.

IS 3761

: 1983

Metal Side Racks (Adjustable Type) - Specification

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This standard specifies the requirements for materials, dimensions, manufacture, and finish of adjustable metal side racks typically used for storage in offices, libraries, and institutions.

Metal Side Racks (Adjustable Type) - Specification

Quick Reference Values

minimum thickness shelves0.8 mm (CRCA steel sheet)

minimum thickness uprights1.2 mm to 1.6 mm depending on height

paint dry film thicknessMinimum 15 to 20 microns

typical shelf depth300 mm to 450 mm

adjustable pitch holesAt intervals of 25 mm or 50 mm for shelf adjustment

Practical Notes

Always verify the sheet metal gauge using a micrometer during procurement, as undersized gauges will lead to shelf sagging under heavy file/book loads.

Pay special attention to the anti-rust treatment and finish (stove enamel or powder coating) specified in the standard to ensure longevity in humid environments.

While the standard specifies standard dimensions, custom dimensions can be manufactured, provided the structural integrity and material thickness limits are adhered to.