Reaffirmed 2024

NATIONAL FOREWORD

This Indian Standard (Part 4) which is identical with ISO 16936-4 : 2005 ‘Glass in building — Forced-entry security glazing — Part 4: Test and classification by pendulum impact under thermally and fire stressed conditions’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Glass, Glassware and Laboratory Ware Sectional Committee and approval of the Chemical Division Council.

Forced-entry security glazing is designed to resist impacts of a hard body, thereby delaying access of objects and/or persons to a protected space for a short period of time. This part of the standard classifies security-glazing products into categories of resistance to impacts of a blunt and a sharp impactor at extreme temperatures.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.