What materials are permitted for these sliding door bolts?

Extruded brass, cast brass, or aluminum alloys.

How are sliding door bolts designated and measured?

They are designated by their overall length (e.g., 250 mm, 300 mm).

What are the coating requirements for aluminum sliding bolts?

They must have an anodic coating not less than Grade AC 15 of IS 1868.

IS 2681

: 1993

Non-ferrous metal sliding door bolts (drops) with padlocks -Specification

CurrentSpecializedSpecificationArchitectural · Builder Hardware

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This standard specifies the requirements for materials, dimensions, manufacture, and finish of non-ferrous metal sliding door bolts (commonly known as aldrops) provided with padlock arrangements. It ensures the hardware is durable, correctly sized, and resistant to corrosion for use in building doors.

Non-ferrous metal sliding door bolts (drops) with padlocks -Specification

Quick Reference Values

standard lengths200, 250, 300, 350 mm

bolt diameter min14 mm for lengths up to 250 mm, 16 mm for 300 mm and above

aluminum anodic coating gradeAC 15 as per IS 1868

Practical Notes

Ensure the correct finish (e.g., anodized for aluminum, polished for brass) is specified when ordering to prevent tarnishing.

When installing, verify the alignment of the hasp and the staple to ensure the padlock can be inserted smoothly without applying force.