What is the maximum water absorption allowed for these sheets?

The maximum water absorption is 20 percent by mass after 24 hours of immersion in water at 27±2°C (Table 1).

What is the standard width of a bamboo mat corrugated sheet?

The standard width is 1050 mm, with a tolerance of ±5 mm (Clause 5.1.1).

Are these sheets fire resistant?

The standard states that fire-retardant chemicals may be added during manufacture to improve fire resistance, but does not mandate a specific fire rating. Performance depends on the specific treatment used.

What is the test for impact resistance?

A 1 kg steel ball is dropped from a height of 1 m onto the sheet. The sheet passes the test if there is no visible crack or damage on the surface (Annex C).

IS 15476

: 2004

Bamboo Mat Corrugated Sheets -Specification

CurrentSpecializedSpecificationMaterials Science · Wood and Other Lignocellulosic Products

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This standard specifies the requirements for manufacturing, dimensions, and physical/mechanical properties of corrugated roofing sheets made from bamboo mats bonded with resin. It covers material quality, performance tests, and marking for a sustainable and eco-friendly building material primarily used in roofing and cladding.

Bamboo Mat Corrugated Sheets -Specification

Quick Reference Values

Minimum Density1.0 g/cm³

Maximum Water Absorption (24h)20 % by mass

Minimum Tensile Strength (Parallel to corrugation)35 N/mm²

Minimum Flexural Strength (Parallel to corrugation)50 N/mm²

Impact Strength (Falling Ball Test)No visible crack from 1 kg ball at 1 m height

Boiling Water ResistanceNo delamination after 2 hours

Practical Notes

Ensure sheets are coated with a suitable weather-resistant paint or coating for longevity and UV protection, as specified by the manufacturer.

The resin binder must be of BWP (Boiling Water Proof) type conforming to IS 848 to ensure durability in exterior conditions.

Handle sheets carefully during transport and installation to avoid chipping or cracking, as they can be more brittle than metal sheets.