What materials are specified for manufacturing these sliding door bolts?

They must be manufactured from mild steel conforming to IS 2062 or IS 1079.

How is the size of the sliding door bolt designated?

The size is designated by the overall length of the sliding bolt (e.g., 250 mm or 300 mm).

What finishes are acceptable under this code?

Finishes can include stove enameling, zinc plating (galvanizing), copper oxidizing, or any other finish as agreed upon between the purchaser and the manufacturer.

IS 281

: 2009

Mild Steel Sliding Door Bolts for Use With Padlocks -Specification

CurrentSpecializedSpecificationBIMArchitectural · Builder Hardware

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This standard covers the requirements for material, dimensions, manufacture, finish, and testing of mild steel sliding door bolts (aldrops) used with padlocks. It is utilized by hardware manufacturers for fabrication and by architects and civil engineers to specify standard builder's hardware in construction bills of quantities.

Mild Steel Sliding Door Bolts for Use With Padlocks -Specification

Quick Reference Values

Standard sizes (length of bolt)200, 250, 300 mm

Minimum thickness of fixing plate2.0 mm

Standard bolt rod diameter12 mm or 16 mm (based on size)

Practical Notes

Always specify the required finish (e.g., galvanized, oxidized, or painted) in the BOQ to ensure adequate corrosion resistance for the specific environment.

Ensure that the sliding bolt moves freely through the staples without excessive play, which is a common manufacturing defect.

Check that the hasp and staple align perfectly to allow easy insertion of the padlock.