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IS 15972:2012 is the Indian Standard (BIS) for bamboo-jute composite corrugated and semi-corrugated sheets - specification. This standard specifies the requirements for corrugated and semi-corrugated sheets made from bamboo and jute composites, bonded with thermosetting resins. It covers materials, dimensions, physical and mechanical properties, and test methods for these eco-friendly roofing and cladding sheets.
Bamboo-Jute Composite Corrugated and Semi-Corrugated Sheets - Specification
Overview
Status
Current
Usage level
Specialized
Domain
Materials Science — Wood and Other Lignocellulosic Products
! This material is an eco-friendly alternative to asbestos or metal sheets for low-cost housing, shelters, and agricultural buildings.
! Proper handling is crucial during transport and installation to prevent cracking, as composite materials can be brittle.
! Always check the manufacturer's test certificate for compliance with key performance indicators like load capacity and water absorption before procurement.
ISO 9933:2014ISO (International Organization for Standardization), International
MediumCurrent
Fibre-cement corrugated sheets and fittings for roofing and cladding
Covers the same product form (corrugated sheets) and application (roofing), but for fibre-cement material instead of a natural fibre composite.
ASTM D7031 - 11(2019)ASTM International, USA
MediumCurrent
Standard Guide for Evaluating Mechanical and Physical Properties of Wood-Plastic Composite Products
Provides test methods for natural fibre (wood) plastic composites, similar to bamboo-jute polymer, but is a guide for testing, not a product specification for roofing sheets.
EN 534:2006+A1:2010CEN (European Committee for Standardization), Europe
LowCurrent
Corrugated bitumen sheets - Product specification and test methods
Specifies requirements for corrugated sheets for roofing, but for bitumen-based materials, not natural fibre composites.
Key Differences
≠The primary material in IS 15972 is a composite of natural fibres (bamboo, jute) with a phenolic resin, whereas international equivalents like ISO 9933 are for inorganic fibre-cement and EN 534 is for bitumen.
≠IS 15972 does not specify requirements for reaction to fire, a critical parameter for building materials. In contrast, ISO 9933 classifies fibre-cement as non-combustible (Euroclass A1).
≠The Indian standard is a niche specification for a specific, locally-developed 'green' building material, while standards like ISO 9933 cover a globally established, mass-produced industrial product.
≠Performance requirements, particularly bending strength, appear significantly higher in IS 15972 compared to typical values in ISO 9933, suggesting different design assumptions or safety factors.
Key Similarities
≈Both IS 15972 and comparable international standards (e.g., ISO 9933) specify functional tests for roofing applications, such as load-bearing capacity and water permeability, to ensure fitness for purpose.
≈All standards for corrugated sheets define critical geometric properties like pitch, depth of corrugation, thickness, and width to ensure consistent installation and performance.
≈They establish a quality control framework that includes sampling procedures, criteria for conformity, and mandatory marking of the product for traceability and compliance.
Parameter Comparison
Parameter
IS Value
International
Source
Breaking Load / Bending Moment
Min. breaking load of 3000 N/m width on a 500mm span, which calculates to a bending moment of 375 Nm/m.
Min. bending moment of 40 Nm/m (Class 1) or 55 Nm/m (Class 2).
ISO 9933:2014
Apparent Density
1250 ± 50 kg/m³
≥ 1400 kg/m³ (for autoclaved sheets)
ISO 9933:2014
Water Permeability
No formation of water drops on the underside after 24 hours under a specified test setup.
No formation of water drops on the underside after 24 hours under a head of water.
ISO 9933:2014
Nominal Thickness
6 mm (+1.0 / -0.5 mm tolerance)
Typically 6.0 mm or 6.5 mm depending on profile.
ISO 9933:2014
Water Absorption (by mass)
Max 20% after 24-hour immersion.
Not typically specified; performance is based on water-tightness test instead.
ISO 9933:2014
Reaction to Fire
Not specified in the standard.
Considered to satisfy the requirements for Class A1 (non-combustible) without testing.
ISO 9933:2014
Pitch of Corrugations
146 ± 3 mm
177 ± 3 mm (for large profile 'Profile 6')
ISO 9933:2014
⚠ Verify details from original standards before use