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APEGBC Technical and Practice Bulletin

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APEGBC Technical and Practice Bulletin APEGBC Technical and Practice Bulletin Structural, Fire Protection and Building Envelope Professional Engineering Services for 5- and 6-Storey Wood Frame Residential Building Projects (Mid-Rise Buildings) © April 2009 All Rights Reserved Revised April 8, 2015 Table of Contents 1.0 INTRODUCTION ................................................................................................................................. 1 1.1 Purpose .................................................................................................................................. 1 1.2 Disclaimer and Exclusion of Liability ...................................................................................... 1 1.3 The Role of APEGBC ............................................................................................................... 2 1.4 Scope of Bulletin .................................................................................................................... 2 1.5 Applicability of Bulletin .......................................................................................................... 2 1.6 Acknowledgements ................................................................................................................ 3 1.7 Introduction of Terms and Abbreviations .............................................................................. 3 2.0 PROFESSIONAL PRACTICE ................................................................................................................. 4 2.1 Coordination .......................................................................................................................... 4 3.0 STRUCTURAL ENGINEERING PRACTICE ISSUES ................................................................................. 5 3.1 Role of the Structural Engineer of Record (SER) .................................................................... 5 3.2 Structural Engineering Services.............................................................................................. 5 3.3 Structural Design Drawing Presentation ................................................................................ 5 3.4 Design Coordination ............................................................................................................... 6 3.5 Design and Detailing of Wood Shearwalls and Diaphragms .................................................. 7 3.6 Design For Building Deformation ........................................................................................... 9 3.7 Fire And Elevator Walls ........................................................................................................ 11 3.8 Hybrid Systems ..................................................................................................................... 13 4.0 FIRE PROTECTION ENGINEERING PRACTICE ISSUES ....................................................................... 15 4.1 Fire Protection Engineering .................................................................................................. 15 4.2 Role of the Fire Protection Engineer (FPE) ........................................................................... 15 4.3 Alternative Solutions and Engineering Judgments .............................................................. 15 4.4 Fire Protection Engineering Design Services ........................................................................ 15 4.5 Effects of Shrinkage .............................................................................................................. 15 4.6 Effects of Differential Lateral Movements ........................................................................... 16 4.7 Firewalls ............................................................................................................................... 16 4.8 Elevator Walls ...................................................................................................................... 17 4.9 Reduced Loading of Fire Rated Assemblies ......................................................................... 18 4.10 Fire Separations ................................................................................................................... 18 4.11 Concealed/Void Spaces ........................................................................................................ 19 4.12 Sprinkler Systems ................................................................................................................. 20 4.13 Firefighting Assumptions ..................................................................................................... 21 4.14 Exterior Cladding .................................................................................................................. 21 4.15 Use of Wood Trim or Other Combustible Components ....................................................... 21 4.16 Soffits and Roof Overhangs .................................................................................................. 22 4.17 Coordination ........................................................................................................................ 22 4.18 Field Review ......................................................................................................................... 22 4.19 Peer Review .......................................................................................................................... 22 5.0 BUILDING ENVELOPE ENGINEERING PRACTICE ISSUES .................................................................. 23 5.1 Role of the Building Envelope Engineer (BEE) ...................................................................... 23 5.2 Building Envelope Engineering Services: Appropriate Professional Practice ...................... 23 5.3 Wood Shrinkage ................................................................................................................... 23 5.4 Change in Environmental Loads – Impact on Building Envelope ......................................... 26 5.5 Impact of Increased Wind and Rain Loads ........................................................................... 26 5.6 Increased Structural Mass .................................................................................................... 28 5.7 Maintenance And Renewal .................................................................................................. 29 6.0 QUALITY ASSURANCE/QUALITY CONTROL...................................................................................... 31 7.0 EDUCATION, TRAINING AND EXPERIENCE ...................................................................................... 33 8.0 REFERENCE AND RELATED DOCUMENTS ........................................................................................ 34 APPENDIX A: MINISTERIAL ORDER ............................................................................................................. 36 APPENDIX B: DEFINITIONS ......................................................................................................................... 41 APPENDIX C: E XAMPLE TOLERANCES ON STRUCTURAL DRAWINGS AND WOOD FRAME SHEARWALLS . 43 APPENDIX D: GUIDELINES FOR PROFESSIONAL PRACTICE FOR A FIRE PROTECTION ENGINEER ............... 45 APPENDIX E: EXAMPLE OF A STRUCTURAL DESIGN FOR A SIX STOREY WOOD FRAME RESIDENTIAL BUILDING .................................................................................................................................................... 61 1.0 INTRODUCTION This bulletin provides detailed information on the increased level of complexity involved in engineering considerations which need to be addressed in going from 4 storey to mid-rise building projects. Where relevant, guidance provided in this bulletin is applicable for use on wood frame building projects of 4 storeys or less. Examples of engineering design considerations which affect professional engineering practices in going from 4 storey to mid-rise building projects include: Increased lateral loads (wind and seismic); Increased environment loads on building envelope assemblies; Increased cumulative effect of wood shrinkage; Increased structural mass of the wood framing affecting such items as glazing and insulation which, in turn, impact the energy performance of the building; and Enhanced requirements for fire and life safety with respect to building materials and fire suppression systems. The above examples reinforce the increased need for an enhanced level of coordination of the engineering design between various engineering disciplines and with other design consultants on mid-rise building as compared to that provided on 4 storey building projects of similar construction. 1.1 PURPOSE This bulletin provides basic technical and practice guidance on structural, fire protection and building envelope professional engineering issues related to mid-rise buildings. In the areas identified standards of practice that a Member should follow in providing structural, fire protection and building envelope professional engineering services for these types of building projects are set out. This bulletin has been developed to identify issues to be taken into consideration when providing engineering services on such buildings and to provide sources of information and in some instances, design options. Engineering practices in this area will evolve as codes, standards and guides relevant to these areas of practice are updated and revised to reflect a change to the BCBC permitting
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