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IS 15089:2001 is the Indian Standard (BIS) for fasteners for roofing and cladding applications. This standard specifies the requirements for self-drilling and self-tapping fasteners used for fixing roofing and cladding systems. It covers materials, dimensions, mechanical properties, performance criteria like corrosion resistance (salt spray test), and testing procedures for both carbon steel and stainless steel fasteners.
Specifies requirements for fasteners used in roofing and cladding applications.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Ensure the EPDM washer is properly compressed during installation; over-tightening can damage the washer and lead to leaks, while under-tightening will not create a weather-tight seal.
! Always match the fastener's corrosion resistance class (e.g., Class 3 for moderate, Class 4 for severe environments) to the project's location and the lifespan of the cladding material.
! On-site, verify the manufacturer's markings on the fastener head to ensure it matches the specified type and class as per project specifications and Clause 11 of the standard.
AS 3566.1:2002Standards Australia / Standards New Zealand (Australia/New Zealand)
HighCurrent
Self-drilling screws for the building and construction industries - Part 1: General requirements and mechanical properties
Specifies mechanical properties for self-drilling screws used in building, directly aligning with roofing and cladding applications.
ISO 10666:2019International Organization for Standardization (ISO)
HighCurrent
Drilling screws with tapping screw thread — Mechanical and functional properties
Defines the core mechanical and functional properties for the exact type of fastener covered by the IS code.
ASTM C1513-13(2018)ASTM International (USA)
MediumCurrent
Standard Specification for Steel Tapping Screws for Cold-Formed Steel Framing Connections
Covers steel screws for structural framing, which overlaps significantly with fixing cladding to steel structures.
DIN 7504:2009Deutsches Institut für Normung (Germany)
MediumWithdrawn
Self-drilling screws with tapping screw thread - Dimensions, requirements and testing
A widely referenced historical standard for self-drilling screws, covering dimensions and mechanical tests similar to IS 15089.
Key Differences
≠IS 15089 has general corrosion resistance requirements (e.g., zinc thickness), whereas standards like Australia's AS 3566.2 define a detailed 'Class' system (1 to 5) linking coating performance to specific environmental corrosivity levels.
≠The drill time test in IS 15089 specifies drilling through two stacked 1.6 mm steel plates. In contrast, AS 3566.1 defines a range of drilling capacities against single plates of varying thicknesses (from 0.75mm to 12mm) depending on the screw's intended use.
≠International standards like ISO 10666 and ASTM C1513 often provide more detailed specifications for different materials, including various grades of stainless steel (e.g., 304, 316, 410), whereas IS 15089 is primarily focused on case-hardened carbon steel.
≠There are minor but specific differences in required hardness values. For example, ISO 10666 mandates a slightly higher minimum surface hardness for the drill point (620 HV) compared to IS 15089 (560 HV).
Key Similarities
≈All standards cover the same fundamental fastener type: self-drilling and/or self-tapping screws for construction applications, particularly for fixing sheet metal.
≈A core set of mandatory mechanical tests is common across all standards, including torsional strength, hardness (surface and core), and a functional drilling/driving test.
≈For carbon steel screws, all standards require a case-hardened surface for thread-forming and drilling, combined with a tough, ductile core to prevent brittle failure under load.
≈All standards acknowledge the critical need for corrosion protection and specify requirements for protective coatings, most commonly zinc plating with a supplementary treatment as a baseline.
Parameter Comparison
Parameter
IS Value
International
Source
Surface Hardness (Drill Point)
Minimum 560 HV 0.3
Minimum 620 HV 0.3
ISO 10666:2019
Core Hardness
240 to 450 HV 5
240 to 425 HV 5
AS 3566.1:2002
Minimum Torsional Strength (for Ø 5.5mm screw)
9.0 Nm
9.5 Nm
AS 3566.1:2002
Effective Case Depth (Threads)
0.05 mm to 0.18 mm
0.10 mm to 0.23 mm (for ST4.2 to ST6.3)
ISO 10666:2019
Drill Test (Example)
Drill through two 1.6 mm steel plates within 5 seconds
Drill through one 3.0 mm steel plate within 4.5 seconds
AS 3566.1:2002
Head-to-Shank Fillet Radius (for Hex Head)
Not explicitly defined in the same way
Minimum 0.5 mm for a M5.5 screw
AS 3566.1:2002
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Minimum Core Hardness (Carbon Steel)320 to 400 HV
Minimum Surface Hardness (Carbon Steel)560 HV
Maximum Drilling Time (1.6 mm thick steel)4 seconds
Minimum Salt Spray Resistance (Class 3)240 hours
Minimum Salt Spray Resistance (Class 4)1000 hours
Minimum Zinc Coating Thickness (Class 3)12 µm
Tables & Referenced Sections
Key Tables
Table 1 - Mechanical Properties of Carbon Steel Fasteners
Table 2 - Mechanical Properties of Austenitic Stainless Steel Fasteners
Table 4 - Coating and Salt Spray Test Requirements for Carbon Steel Fasteners
What are the main fastener types covered by IS 15089?+
Self-drilling and self-tapping screws, typically with hexagon heads, made from carbon steel or stainless steel.
What does a 'Class 3' fastener signify?+
It refers to a carbon steel fastener with a minimum zinc coating of 12 µm, required to withstand a 240-hour neutral salt spray test, making it suitable for moderate corrosive environments (Table 4).
What are the requirements for the sealing washer?+
The washer is typically a composite of a metal backing (aluminium or steel) and a sealing element made of EPDM, as specified in Annex B, to ensure a durable, weather-tight seal.
How is the drilling capability of a self-drilling screw tested?+
The test measures the time taken for the screw to fully drill through a steel plate of specified thickness under a fixed load. For example, it must penetrate a 1.6 mm plate in under 4 seconds (Clause 7.5).