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IS 281 : 2009Mild Steel Sliding Door Bolts for Use With Padlocks -Specification

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BS EN 12051 · ANSI/BHMA A156.16
CurrentSpecializedSpecificationBIMArchitectural · Builder Hardware
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OverviewValues3InternationalTablesFAQ3Related

IS 281:2009 is the Indian Standard (BIS) for mild steel sliding door bolts for use with padlocks -specification. 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

Overview

Status
Current
Usage level
Specialized
Domain
Architectural — Builder Hardware
Type
Specification
International equivalents
BS EN 12051:2000 · BSI (British Standards Institution), UK / CEN (European Committee for Standardization), EuropeANSI/BHMA A156.16-2018 · ANSI (American National Standards Institute) / BHMA (Builders Hardware Manufacturers Association), USA
Typically used with
IS 2062IS 1079IS 1363IS 4736
Also on InfraLens for IS 281
3Key values1Tables3FAQs

BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.

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.
Frequently referenced clauses
Cl. 4MaterialCl. 5Dimensions and TolerancesCl. 6ManufactureCl. 7FinishCl. 9Marking
Pulled from IS 281:2009. Browse the full clause & table index below in Tables & Referenced Sections.
mild steelsteelhardware

International Equivalents

Similar International Standards
BS EN 12051:2000BSI (British Standards Institution), UK / CEN (European Committee for Standardization), Europe
MediumCurrent
Builders hardware. Door and window bolts. Requirements and test methods
Covers requirements and performance-based test methods for various door bolts, including sliding types.
ANSI/BHMA A156.16-2018ANSI (American National Standards Institute) / BHMA (Builders Hardware Manufacturers Association), USA
HighCurrent
American National Standard for Auxiliary Hardware
Specifies performance criteria for auxiliary hardware, including surface-mounted sliding bolts (Type L04031).
Key Differences
≠IS 281 is a prescriptive standard, defining specific dimensions, material grades (Mild Steel to IS 2062), and manufacturing details. International equivalents like BS EN 12051 and ANSI/BHMA A156.16 are performance-based, specifying test outcomes (e.g., cycle life, corrosion resistance, strength) and allowing for various materials and designs that meet those criteria.
≠International standards mandate rigorous durability and operational testing. For example, ANSI/BHMA A156.16 requires Grade 1 bolts to complete 25,000 cycles, whereas IS 281 only requires a manual check for smooth operation without a specified cycle count.
≠Corrosion resistance in BS EN 12051 is classified into grades based on hours of resistance in a neutral salt spray test. IS 281 specifies the type of finish (e.g., galvanizing, plating) but does not have a graded performance requirement for corrosion.
≠International standards often include static load tests to determine the strength and security of the bolt. IS 281 does not specify any load-bearing capacity tests, focusing instead on dimensional and material compliance.
Key Similarities
≈All standards address the same basic hardware item: a sliding bolt (often called a barrel bolt or tower bolt) for manually securing doors, gates, and windows.
≈The fundamental design, comprising a backplate, a sliding shoot (bolt), and one or more staples/keepers, is common to the products covered by all these standards.
≈All standards acknowledge the provision for securing the bolt with a padlock as a key feature, ensuring the staple/hasp is designed to accept a padlock shackle.
≈Each standard requires the product to be marked with the manufacturer's name or trademark for identification and traceability.
Parameter Comparison
ParameterIS ValueInternationalSource
Primary MaterialMild Steel conforming to IS 2062Steel, brass, bronze, stainless steel, or aluminum meeting performance requirementsANSI/BHMA A156.16-2018
Durability TestingManual check for smooth, non-sticking operationGraded performance based on cycle tests (e.g., 25,000 cycles for Grade 1)ANSI/BHMA A156.16-2018
Corrosion Resistance TestNot specified; controlled by specifying finish type (e.g., zinc plating)Graded performance in a Neutral Salt Spray (NSS) test (e.g., Grade 5: 240 hours)BS EN 12051:2000
Dimensional SpecificationPrescribed in detailed tables (e.g., length, width, shoot diameter for each size)Dimensions are at manufacturer's discretion, as long as performance tests are metBS EN 12051:2000
Bolt Shoot Diameter (for 150mm bolt)10.0 mm nominalNot specified prescriptively; must be sufficient to pass strength testsANSI/BHMA A156.16-2018
Strength TestNot specifiedStatic load tests applied to the bolt and keeper assemblyANSI/BHMA A156.16-2018
⚠ Verify details from original standards before use

Key Values3

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)

Tables & Referenced Sections

Key Tables
Table 1 - Dimensions of Mild Steel Sliding Door Bolts
Key Clauses
Clause 4 - Material
Clause 5 - Dimensions and Tolerances
Clause 6 - Manufacture
Clause 7 - Finish
Clause 9 - Marking

Related Resources on InfraLens

Cross-Referenced Codes
IS 2062:2011Hot Rolled Medium and High Tensile Structural...
→
IS 1079:2017Hot Rolled Carbon Steel Sheets and Strips
→
IS 1363:2002Hexagon Head Bolts, Screws and Nuts of Produc...
→
IS 4736:2003Hot-Dip Galvanized Coatings on Structural Ste...
→

Frequently Asked Questions3

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.

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