Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 1) (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by the Building Construction Practices Sectional Committee, had been approved by the Civil Engineering Division Council.

Glazing is an important item in building construction, and glass, the primary glazing element has to be selected to cater to several requirements. Fixing of glass is a specialized operation, when properly done, shall avoid the hazards of broken glass. Growing trend in resorting to glazed windows/doors in buildings; and structural glazing on exterior of buildings and structures has considerably increased the importance of glazing and the need for proper workmanship. This standard was, therefore formulated to provide required guidance and provisions on the subject matter.

This Indian Standard is published in four parts. The other parts in this series are:

Part 2 Energy and light

Part 3 Fire and loading

Part 4 Safety related to human impact

This standard (Part 1) was first published in 2016 to provide guidance in the selection of appropriate glazing for various types for building construction.

Correct selection of materials to be used in glazing for buildings depends on many factors. Therefore, provisions in this standard should be used in conjunction with those in other parts.

Use of organic coated films including safety films on glass (say annealed) shall not be construed as safety glass as per this standard, and hence users should exercise caution in choosing their options.

This revision of the standard is aimed at bringing the provisions at par with the provisions of the SP 7 (Part 6/Sec 8) : 2016 ‘National Building Code of India 2016: Part 6 Structural Design, Section 8 Glass and Glazing’. In this revision, the following major changes have been made:

a) Reference to sustainability aspects during the selection of glass has been introduced;

b) Various possible laminated glass combinations have been included;

c) Provisions related to selection of materials for glass fins have been included;

d) Deflection limits for the frame and the centre of glass pane have been updated; and

e) Definitions of various terms have been updated as per the prevailing engineering practice.

With the publication of this standard (along with the other parts) it is proposed to withdraw the IS 3548 : 1988 ‘Code of practice for glazing in buildings ( first revision )’, in view of the comprehensive provisions proposed herein. However, the contents of the same are included in this standard as an informative annex (see Annex B).

The composition of the Committee responsible for the formulation of this standard is given in Annex C.

For the purpose of deciding whether a particular requirement of this standard is complied with the final value, observed or calculated, expressing the result of a test or analysis shall be rounded off in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised )’. The number of significant places retained in the rounded off value should be same as that of the specified value in this standard.