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IS 14457:1997 is the Indian Standard (BIS) for aluminium alloy corrugated sheets for roofing and cladding. This standard specifies the requirements for wrought aluminium and aluminium alloy corrugated sheets intended for roofing, cladding, and general purposes. It covers material alloys, temper, dimensions, tolerances, mechanical properties, finish, and testing procedures.
Specifies requirements for corrugated sheets made from aluminium alloys for roofing and cladding.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Ensure the specified alloy and temper (e.g., 3105-H18) match the structural and environmental requirements of the project.
! Verify material test certificates upon delivery to confirm compliance with chemical composition and mechanical properties as per the standard.
! To prevent galvanic corrosion, use compatible fasteners (e.g., stainless steel with insulating washers) when fixing aluminium sheets to steel structures.
Consolidated list per BIS. For the text of each amendment, refer to the BIS portal link above.
aluminium alloyroofingcladdingcorrugated sheet
International Equivalents
Similar International Standards
EN 508-2:2019CEN (European Committee for Standardization), Europe
HighCurrent
Roofing products from metal sheet - Specification for self-supporting products of steel, aluminium or stainless steel sheet - Part 2: Aluminium
Directly addresses self-supporting profiled aluminium sheets for roofing and cladding applications.
ASTM B209-21ASTM International, USA
MediumCurrent
Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate
Covers the base flat sheet material (alloys, tempers, properties) before it is formed into corrugated profiles.
AS/NZS 1734:1997Standards Australia / Standards New Zealand, Australia/New Zealand
MediumCurrent
Aluminium and aluminium alloys - Flat sheet, coiled sheet and plate
Specifies requirements for the raw material (flat sheet) used to produce corrugated sheets.
ISO 6361-2:2014ISO (International Organization for Standardization), International
LowCurrent
Wrought aluminium and aluminium alloys — Sheets, strips and plates — Part 2: Mechanical properties
Provides the mechanical property requirements for the base aluminium sheet, but not for the final profiled product.
Key Differences
≠The Indian Standard specifies standard profiles (e.g., 75 mm pitch), whereas EN 508-2 focuses on performance requirements and allows manufacturers to declare their own geometry, with specified tolerances on those declared values.
≠Alloy designation systems differ. IS 14457 uses Indian designations (e.g., 31000, 19000), while international standards use the Aluminium Association system (e.g., 3105, 1100) or EN equivalents (e.g., EN AW-3105).
≠Dimensional tolerances, particularly for thickness, are often more stringent in European standards (EN) compared to the tolerances specified in IS 14457.
≠EN 508-2 includes requirements for durability, reaction to fire, and external fire performance, which are not explicitly detailed in the same manner within IS 14457:1997.
Key Similarities
≈All standards specify the use of similar wrought aluminium alloys, such as 3105 and 8011, which are known for their good formability and corrosion resistance in atmospheric conditions.
≈The 'H' temper designation system for strain-hardened alloys (e.g., H14, H16, H18) is a common basis for specifying the mechanical state and properties of the aluminium sheet across all standards.
≈Core mechanical tests, such as the tensile test (for strength and elongation) and the bend test (for formability and ductility), are fundamental requirements in both IS 14457 and its international counterparts.
≈The primary application is identical: providing a specification for aluminium alloy sheets specifically intended for building envelope applications like roofing and wall cladding.
Parameter Comparison
Parameter
IS Value
International
Source
Alloy Type
Specifies alloys including 3105, 8011, 31000 (equivalent to 3103)
Specifies alloys including EN AW-3105, EN AW-3004, EN AW-8011A
EN 508-2:2019
Tensile Strength (UTS) for Alloy 3105-H16
150 MPa, minimum
150 - 190 MPa
EN 485-2 (referenced by EN 508-2)
Thickness Tolerance (for nominal 0.50 mm sheet)
± 0.05 mm
± 0.04 mm (for range 0.4 to <0.6 mm)
EN 485-4
Bend Test (for temper H16, thickness 't')
180° bend around a mandrel of diameter 2t without cracking.
180° bend with an inside radius of 1t (equivalent to mandrel diameter 2t) without cracking.
What are the primary aluminium alloys specified in this standard?+
The code specifies alloys such as 19000 (commercially pure), 3105, 31000, and 52000, with their properties referenced from IS 737.
What is the standard corrugation profile defined by IS 14457?+
The standard profile has a pitch of 75 mm and a depth of 17.5 mm (Clause 5.4).
What is the minimum elongation required for Alloy 3105 in H18 temper?+
A minimum elongation of 3% on a 50 mm gauge length is required (Table 2).
What markings should be present on the sheets?+
Each sheet or bundle should be marked with the manufacturer's name, alloy and temper designation, dimensions, and the Standard Mark (ISI mark) (Clause 11).