National foreword

This British Standard is the UK implementation of EN 16612:2019.

The UK participation in its preparation was entrusted to Technical Committee B/520/4, Glass & Glazing Applications.

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2019.

This European Standard was approved by CEN on 21 July 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

European foreword

This document (EN 16612:2019) has been prepared by Technical Committee CEN/TC 129 “Glass in Building”, the secretariat of which is held by NBN.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2020and conflicting national standards shall be withdrawn at the latest by April 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Introduction

This document gives a method of determining the lateral load resistance of linearly supported glass elements.

The method of determining the load resistance of glass is in accordance with the principles of structural Eurocode EN 1990: Basis of structural design. The actions are determined in accordance with the structural Eurocode 1 series for actions on structures, e.g. EN 1991‑1‑1, EN 1991‑1‑3 and EN 1991‑1‑4, including the National annexes. In the design processes, the reliability is part of national competency. For that reason, this document foresees that, to conform with the rules applied by the Eurocodes, the following parameters are subject to national determination:

material partial factors, γ_M;A and γ_M;v ;

— factors for the load duration, k_mod ;

— factor for stressed edges, k_e.

1 Scope

This document gives a method of determining the design value of the bending strength of glass. It gives the general method of calculation, and guidance for lateral load resistance of linearly supported glazed elements used as infill panels.

NOTE Examples of lateral loads are wind loads, snow loads, self weight of sloping glass, and cavity pressure variations on insulating glass units.

This document gives recommended values for the following factors for glass as a material:

material partial factors, γ_M;A and _γ_M;v ;
factors for the load duration, k_mod ;
factor for stressed edges, k_e.

Most glass in buildings is used as infill panels. This document covers those infill panels that are in a class of consequence lower than those covered in EN 1990, so proposed values for the partial load factors, γ_Q and γ_G, are given for these infill panels.

The action of cavity pressure variations on insulating glass units is not covered by Eurocodes, so this document also gives proposed values of combination factors, ψ₀, ψ₁ and ψ₂, for this action.

This document does not determine suitability for purpose. Resistance to lateral loads is only one part of the design process, which could also need to take into account:

in-plane loading, buckling, lateral torsional buckling, and shear forces,
environmental factors (e.g. sound insulation, thermal properties),
safety characteristics (e.g. fire performance, mode of breakage in relation to human safety, security).

This document does not apply to channel shaped glass, glass blocks and pavers, or vacuum insulated glass units.

2 Normative references

3 Terms and definitions

4 Symbols and abbreviations

5 Requirements

5.1 Basis of determination of load resistance of glass

5.2 Material partial factor

5.3 Process of determining the load resistance of glass

6 Mechanical and physical properties of glass

6.1 Values

6.2 Approximate values

7 Actions

7.1 Assumptions related to the actions and combinations of actions

7.2 Combinations of actions

8 Strength and stress

8.1 Design value of bending strength for annealed glass

8.2 Design value of bending strength for prestressed glass

9 Calculation principles and conditions

9.1 General method of calculation

9.2 Calculation method for laminated glass and laminated safety glass

9.3 Calculation method for insulating glass units

Bibliography

BS EN 16612:2019

Glass in building. Determination of the lateral load resistance of glass panes by calculation

Current, Under Review

Published:

31 Oct 2019