Is this standard still valid?

No, IS 13008:1990 has been officially withdrawn by the Bureau of Indian Standards.

What is the main safety concern with this material?

The asbestos fibres in the sheets are known carcinogens when inhaled. Disturbance of the material can release these fibres.

What is the required breaking load for these sheets?

The minimum average breaking load is 3000 N/m width, as specified in Table 2.

What are the standard dimensions for the corrugation?

The nominal pitch is 76.2 mm and the nominal depth is 17.5 mm, as per Table 1.

IS 13008

: 1990

Shallow corrugated asbestos cement sheets

CurrentRareSpecificationMaterials Science · Cement Matrix Products

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This standard specifies the requirements for shallow corrugated asbestos cement sheets used for roofing and cladding. It covers the material composition, dimensions and tolerances, physical requirements such as breaking load and water absorption, and methods of testing. This document aims to ensure quality and performance for these specific roofing products.

Shallow corrugated asbestos cement sheets

Quick Reference Values

Nominal thickness5.0 mm

Nominal pitch of corrugation76.2 mm

Nominal depth of corrugation17.5 mm

Overall width800 mm

Minimum average breaking load3000 N/m width

Maximum water absorption30 percent by mass

Practical Notes

This standard has been WITHDRAWN by BIS. It should not be used for new construction or manufacturing.

The product contains asbestos, a hazardous material. Extreme care and appropriate safety measures (PPE, wet methods) are required when handling, cutting or demolishing existing sheets to prevent inhalation of carcinogenic fibres.

Modern, safer alternatives include non-asbestos fibre cement sheets (IS 14862) or metal roofing sheets.