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IS 15833:2009 is the Indian Standard (BIS) for stainless steel tower bolts -specification. This standard specifies the material, dimensional, and performance requirements for stainless steel tower bolts used in buildings. It covers material grade, dimensions for various nominal sizes, construction quality, finish, and corrosion resistance criteria to ensure product quality and durability.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Always verify the grade of stainless steel is AISI 304, as inferior grades (like 200 series) are often substituted but provide poor corrosion resistance.
! Ensure the bolt 'shoot' moves smoothly within its guides without sticking, which indicates proper manufacturing tolerances.
! The standard applies to the material and dimensions; aesthetic finish (e.g., satin, matte, polished) is a separate specification agreed upon with the manufacturer.
Consolidated list per BIS. For the text of each amendment, refer to the BIS portal link above.
stainless steelhardware
International Equivalents
Similar International Standards
EN 12051:2001CEN (European Committee for Standardization), Europe
HighCurrent
Builders' hardware - Door and window bolts - Requirements and test methods
Covers requirements and testing for manually operated door and window bolts, including barrel/tower bolts.
ANSI/BHMA A156.16-2018ANSI/BHMA (American National Standards Institute / Builders Hardware Manufacturers Association), USA
MediumCurrent
American National Standard for Auxiliary Hardware
Specifies performance requirements for auxiliary hardware, including surface bolts, which are equivalent to tower bolts.
Key Differences
≠IS 15833 classifies bolts primarily by stainless steel material grade (e.g., Grade 1 for AISI 304, Grade 3 for AISI 430), whereas EN 12051 uses a detailed 8-digit performance classification code (covering use, durability, corrosion, etc.) which is material-independent.
≠The Indian standard is highly prescriptive, providing detailed dimensional tables for various sizes of tower bolts. In contrast, EN 12051 and ANSI/BHMA A156.16 are primarily performance-based, focusing on operational test results rather than mandating specific product dimensions.
≠IS 15833 specifies a single endurance requirement of 50,000 cycles, while EN 12051 and ANSI/BHMA A156.16 offer multiple grades based on cycle testing (e.g., ANSI Grade 1 requires 100,000 cycles, Grade 2 requires 50,000 cycles).
Key Similarities
≈All standards recognize stainless steel as a key material for the construction of high-quality bolts due to its inherent strength and corrosion resistance.
≈All three standards utilize the Neutral Salt Spray (NSS) test (as per ISO 9227 or ASTM B117) as the standard method for evaluating the corrosion resistance of the bolts.
≈The fundamental scope of all standards is to specify requirements for manually operated, surface-mounted slide-type bolts used for securing doors, gates, and windows.
≈Each standard includes requirements for some form of static strength testing to ensure the bolt can resist a specified lateral force when in the locked position.
Parameter Comparison
Parameter
IS Value
International
Source
Primary Stainless Steel Grade
Grade 1, conforming to X04Cr19Ni9 of IS 6911 (equivalent to AISI 304)
Not specified by material; performance-based. Typical materials used to meet grades include EN 1.4301 (304).
EN 12051:2001
Endurance / Cycle Test
50,000 cycles
Grade 1: 100,000 cycles; Grade 2: 50,000 cycles
ANSI/BHMA A156.16-2018
Corrosion Resistance (Austenitic Steel)
96 hours Neutral Salt Spray (NSS) for Grade 1 (AISI 304)