NZS :2008. Glazing in buildings NZS :2008. Part 4: Wind, dead, snow, and live actions. New Zealand Standard

Transcription

1 Incorporating Amendment No. 1 New Zealand Standard Glazing in buildings Part 4: Wind, dead, snow, and live actions Superseding NZS 4223:Part 4:2000 NZS :2008

2 COMMITTEE REPRESENTATION This Standard was prepared under the supervision of the P4223 Committee for the Standards Council established under the Standards Act 1988 The committee consisted of representatives of the following nominating organisations: Building Research Association of New Zealand Limited Department of Building and Housing Glass Association of New Zealand Institution of Professional Engineers New Zealand New Zealand Safety Glass Association Window Association of New Zealand ACKNOWLEDGEMENT Standards New Zealand gratefully acknowledges the contribution of time and expertise from all those involved in developing this standard. COPYRIGHT The copyright of this document is the property of the Standards Council. No part of this document may be reproduced by photocopying or by any other means without the prior written permission of the Chief Executive of Standards New Zealand, unless the circumstances are covered by Part 3 of the Copyright Act Standards New Zealand will vigorously defend the copyright in this standard. Every person who breaches Standards New Zealand s copyright may be liable, under section 131(5)(a) of the Copyright Act 1994, to a fine not exceeding $10,000 for every infringing copy to which the offence relates, but not exceeding $150,000 for the same transaction, or to imprisonment for a term not exceeding 5 years. Those in breach under section 131(5)(b) of the Copyright Act 1994 may be liable to a fine not exceeding $150,000 or to imprisonment for a term not exceeding 5 years. If there has been a flagrant breach of copyright, Standards New Zealand may also seek additional damages from the infringing party, in addition to obtaining injunctive relief and an account of profits. Published by Standards New Zealand, the trading arm of the Standards Council, Private Bag 2439, Wellington Telephone: (04) ; Fax: (04) ; Website: AMENDMENTS No. Date of issue Description Entered by, and date 1 29 February 2016 Updates and corrects current standard, and incorporates Amendments No 1 and No 2 of AS 1288 Incorporated in this edition

3 Incorporating Amendment No. 1 New Zealand Standard Glazing in buildings Part 4: Wind, dead, snow, and live actions Superseding NZS 4223:Part 4:2000 ISBN (Print) ISBN (PDF)

4 NOTES

5 CONTENTS Committee representation... IFC Acknowledgement... IFC Copyright... IFC Referenced documents... vi Latest revisions... vi Foreword... vii Review of standards... vii Section 1 SCOPE AND GENERAL Scope Application Compliance with NZBC Interpretation Definitions VERTICAL GLAZING General Design wind pressure Insulating glass units Maximum span for glass panels subjected to wind actions Organic safety films and other glass coatings SLOPED GLAZING General Design criteria Loads and actions Selection of sloped overhead glass...48 Appendix A Simplified method for determining ultimate and serviceability limit state design wind pressures (Normative)...55 B Calculation examples (Informative)...58 C Sloped overhead glazing fracture characteristics (Informative)...64 D Sloped and overhead glazing insulating glass units (Informative)...66 E Method for the determination of the wind pressure on sloped glazing (Normative) F Maximum spans for 1.1 Kn live loads (Informative)...73 Table 1 Wind pressures for NZS 3604 and NZS 4229 structures Glass thickness Glass type factor c Serviceability limit state wind pressures for NZS 3604 and NZS 4229 structures...9 COPYRIGHT Standards New Zealand iii

6 5 Loads perpendicular to the glass due to self (dead) weight and snow Maximum altitudes (m) for the application of 1.0 kpa, 1.5 kpa and 2.0 kpa snow loads on the sloping roof for each snow region Maximum span of annealed laminated glass Maximum span of heat-strengthened laminated glass Maximum span of toughened laminated glass Maximum span of monolithic toughened glass Building limitations applicable to Table Ultimate and serviceability limit state design wind pressures for glazing in walls of buildings with limitations as detailed in Table Basic limit state (ULS or SLS) wind pressure (kpa) for sloped glazing or flat land areas Basic ultimate limit state (ULS or SLS) wind pressure (kpa) for sloped glazing for areas other than flat land areas Limit state (either ULS or SLS) design wind pressures for sloped glazing in buildings (kpa) Maximum span of laminated annealed glass Maximum span of laminated heat-strengthened glass Maximum span of laminated toughened glass Maximum span of toughened glass Figure 1 Maximum span for monolithic 3 mm annealed glass Maximum span for monolithic 4 mm annealed glass Maximum span for monolithic 5 mm annealed glass Maximum span for monolithic 6 mm annealed glass Maximum span for monolithic 8 mm annealed glass Maximum span for monolithic 10 mm annealed glass Maximum span for monolithic 12 mm annealed glass Maximum span for monolithic 15 mm annealed glass Maximum span for monolithic 19 mm annealed glass Maximum span for monolithic 25 mm annealed glass Maximum span for monolithic 4 mm toughened glass Maximum span for monolithic 5 mm toughened glass Maximum span for monolithic 6 mm toughened glass Maximum span for monolithic 8 mm toughened glass Maximum span for monolithic 10 mm toughened glass Maximum span for monolithic 12 mm toughened glass Maximum span for monolithic 15 mm toughened glass Maximum span for monolithic 19 mm toughened glass Maximum span for monolithic 25 mm toughened glass Maximum span for monolithic 3 mm heat-strengthened glass Maximum span for monolithic 4 mm heat-strengthened glass Maximum span for monolithic 5 mm heat-strengthened glass Maximum span for monolithic 6 mm heat-strengthened glass Maximum span for monolithic 8 mm heat-strengthened glass...33 iv COPYRIGHT Standards New Zealand

7 25 Maximum span for monolithic 10 mm heat-strengthened glass Maximum span for monolithic 12 mm heat-strengthened glass Maximum span for 5 mm annealed laminated glass Maximum span for 6 mm annealed laminated glass Maximum span for 8 mm annealed laminated glass Maximum span for 10 mm annealed laminated glass Maximum span for 12 mm annealed laminated glass Maximum span for 16 mm annealed laminated glass Maximum span for 20 mm annealed laminated glass Maximum span for 24 mm annealed laminated glass Curves for B/t allowable for deflection of glass limited to span/ Snow regions...51 B1 Example monolithic 4 mm toughened glass...62 B2 Example monolithic 5 mm toughened glass...63 D1 Insulating glass unit sloped glazing combinations...67 E1 Wind regions and lee zones...69 COPYRIGHT Standards New Zealand v

8 REFERENCED DOCUMENTS Reference is made in this document to the following: New Zealand standards NZS 3504:1979 NZS 3604:1999 NZS 3619:1979 NZS 4223 Part 1:2008 Part 2:2016 Part 3:2016 Specification for aluminium windows Timber framed buildings Specification for timber windows Glazing in buildings Glass selection and glazing Insulating glass units Human impact safety requirements Supp 1:2008 Supplement 1 to NZS :2008 and NZS :2008 NZS 4229:1999 NZS 4232 Part 2:1988 Concrete masonry buildings not requiring specific engineering design Performance criteria for fire resisting enclosures Fire resisting glazing systems Joint Australian/New Zealand standards AS/NZS 1170 Part 0:2002 Part 1:2002 Part 2:2002 Part 3:2003 Structural design actions General principles Permanent, imposed and other actions Wind actions Snow and ice actions AS/NZS 2208:1996 Safety glazing materials in buildings AS/NZS 4666:2000 AS/NZS 4666:2012 Insulating glass units AS/NZS 4667:2000 AS/NZS 4668:2000 Quality requirements for cut-to-size and processed glass Glossary of terms used in the glass and glazing industry Australian standards AS 1288:2006 Glass in buildings Selection and installation Other document New Zealand Building Code Approved Document B1 Structure LATEST REVISIONS The users of this Standard should ensure that their copies of the above-mentioned New Zealand Standards are the latest revisions. Amendments to referenced New Zealand and Joint Australian/New Zealand Standards can be found on vi COPYRIGHT Standards New Zealand

9 Glazing in buildings - Part 4: Wind, dead, snow, and live actions This is a free sample only. Purchase the full publication here: Or contact Standards New Zealand using one of the following methods. Freephone: (New Zealand) Phone: enquiries@standards.govt.nz