Overview of the New Mid-Rise Handbook Alberta Wood Solutions Fair Conroy Lum, P.Eng. Research Leader Structural Performance Group Advanced Building Systems February 12, 2015 Calgary
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Program Education Credit Information The Canadian Wood Council is a Registered Provider with the American Institute of Architects. This course meets Continuing Education System requirements for one Learning Unit. Credit earned on completion of this program will be reported to CES Records for AIA members who provided their member number during the online registration. This course also qualifies as Structured Learning with AAA. Certificates of Completion for AAA members, and all other delegates, will be emailed after the event. We will also report participation to the Engineering Institute of Canada on behalf of any engineers who requested their participation be recorded. This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. The same is true for the AAA and EIC. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
Introduction FPInnovations Transformative Technologies program (Gov t of Canada, NRCan) Larger/higher wood frame construction Mass timber construction (CLT, glulam, SCL) Hybrid wood construction CWC, NRC, FPInnovations mid-rise construction initiative NBCC code change proposal 4
Outline Overview Mid-Rise Handbook Scope and objectives Table of contents Overview of each chapters Conclusion Final Remarks 5
Scope and Objectives Multi-disciplinary handbook involving a broad range of industry, research & design experts Focus on mid-rise (5- and 6-storeys) lightframe wood construction In accordance with 2015 NBCC provisions and CSA O86-14 Address podium structures and wood-based vertical shafts Complementary to existing manuals 6
Table of contents Chapter 1: Introduction Chapter 2: Structural Products Chapter 3: Structural Design Chapter 4: Floor Vibration Control Chapter 5: Vertical Differential Movement Chapter 6: Fire Safety Design Chapter 7: Noise Control Chapter 8: Durable & Efficient Building Enclosure Chapter 9: Elevator Shafts and Stairwells Chapter 10: Prefabricated Systems 7
Chapter 1: Introduction Authors: E. Karacabeyli, S. Johal History of light-frame wood construction Code compliance Examples Purpose/Organization of the handbook 8
Chapter 2: Structural Products Authors: S. Gagnon & C. Pirvu Peer-reviewers: C. Lamothe 9
Chapter 2: Structural Products Structural Wood Products and Components Dimensional lumber, FJ lumber, panels, I-joists, trusses, glulam, SCL, CLT Structural Assemblies Conventional floor/roof/wall, mid-ply shearwalls 10
Chapter 3: Structural Design Authors: C. Ni, M. Popovski & J. Wang (CWC) Co-Authors: G. Newfield, M. Rezai Peer-reviewers: T. Leung, G. Doudak 11
Chapter 3: Structural Design Design provisions Design analysis Determination of building period Deflection of stacked multi-storey shearwalls Dynamic analysis Diaphragm flexibility Capacity-based design method 12
Chapter 3: Structural Design 13
Chapter 3: Structural Design High-capacity diaphragms and shearwalls Force transfer around openings in walls Design for podium structures (seismic) Also discussed under fire safety 14
Chapter 3: Structural Design 15
Chapter 3: Structural Design Nails work in double shear thus increasing the lateral load capacity Greater edge distance - panel chip out failure is reduced Nail head away from panel surface - nail pull through failure is prevented Capable of accommodating additional sheathing Stud or Plate Grain direction 89 mm Nail in single shear Sheathing 38 mm 38 mm Stud or Plate Nail in double shear
Chapter 3: Structural Design Standard shear wall 2x4 studs Sheathing 16 16 16 38 89 mm lumber stud spaced at 406 mm o.c. 1.22 2.44 m wood-based panel Sheathing fastened to the narrow face of framing members Drywall/Sheathing Midply TM shear wall Sheathing Cladding/Sheathing Drywall/Sheathing 1.22 2.44 m wood-based panel at the center of the wall 38 89 mm lumber stud rotated 90 degree to those in standard shearwall Sheathing fastened to the wide face of framing members
Chapter 4: Floor Vibration Authors: L. Hu Co-Authors: Y.H. Chui Peer-reviewers: D. Dolan, P. Lepper 18
Chapter 4: Floor Vibration Fundamentals (why, how and what) Review of existing design methods/gaps New design method Worked examples Field control and Remedy System Approach After S. Ohlsson, 1984, "Springness and human induced floor vibration A design guide 19
Chapter 5: Vertical Differential Movement Authors: J. Wang (FPI), C. Ni Co-authors: M. Mohammad, J.D. Candelario Peer-reviewers: J. Wang (CWC), S. Chew, G. Finch 20
Chapter 5: Vertical Differential Movement Causes of vertical differential movement Predicting vertical movement Solutions to reducing and accommodating vertical differential movement Recommendations 21 Images: HPO 2011
Chapter 5: Vertical Differential Movement Wood shrinkage (major cause) Primarily contributed by horizontal wood members Amount depends on MC change and shrinkage coefficient Loading (relatively small cause) Closing of gaps between members (settlement, bedding-in) Elastic compression Time-dependent deformation (creep) All influenced by loads and wood MC 22
Chapter 5: Vertical Differential Movement Always design to allow certain differential movement Detailing for major interfaces provided in the chapter Measures to reduce/accommodate wood shrinkage and differential movement Use and maintain drier wood in construction Use engineered wood for floor joists Good construction sequencing to reduce wood wetting, encourage drying, and allow settling before enclosure 23
Chapter 6: Fire Safety Design Authors: C. Dagenais, L. Osborne Peer-reviewers: M. Sultan, M.-A. Langevin, M. de Lint, K. Calder 24
Chapter 6: Fire Safety Design Fundamentals Combustibility of materials Fire separations Penetrations in fire separations Fire-resistance Firewalls 25
Chapter 6: Fire Safety Design Service spaces and Service facilities Interior finish Safety between floor areas Performance-based fire design Fire safety during construction 26
Chapter 6: Fire Safety Design Fire separations Image : STI Fire Stop inc. Image : Hilti 27
Chapter 6: Fire Safety Design Fire separations 28
Chapter 6: Fire Safety Design Fire safety during construction No more! 29
Chapter 6: Fire Safety Design Other considerations Podium structures Firefighters assumptions Elevator shafts and Exit stairs 30
Chapter 6: Fire Safety Design Podium structures (small and large) Photos: G. Triggs 31
Chapter 6: Fire Safety Design Elevator shafts and Exit stairs 32
Chapter 7: Noise Control Authors: L. Hu Co-authors: C. Pirvu Peer-reviewers: P. Lepper, K. Koo, P. Giles, B. Zeitler 33
Chapter 7: Noise Control Fundamentals (why, how and what) Review of the NBCC requirements Design for occupants satisfaction (2015 NBCC requirement for ASTC) Flanking, FSTC, FIIC Strategy for noise control Noise control through design After C. Benedetti 2010, Timber buildings 34
Chapter 7: Noise Control Noise control through construction Workable and cost effective solutions for mid-rise wood walls and floors Sound insulation of wood elevator shafts and stairwells 35
Chapter 7: Noise Control 36
Chapter 8: Durable & Efficient Building Enclosure Authors: R. Jonkman Co-authors:J. Wang, C. Thivierge Peer-reviewers: G. Finch, P. Morris 37
Chapter 8: Durable & Efficient Building Enclosure Energy codes and requirements Environmental loads Durability Thermal efficiency Building enclosures Natural durability and preservation treatments 38
Chapter 9: Elevator Shafts & Stairwells Authors: T. Leung, C. Ni Co-authors: C. Dagenais, M. Mohammad, J.D. Candelario, L. Hu Peer-reviewers: G. Newfield, R. Malczyk, D. Moses 39
Chapter 9: Elevator Shafts & Stairwells Code provisions Shrinkage, lateral loads and deflection, connections, fire separations, acoustic Non-combustible shafts Wood-based shafts Hybrid 40
Chapter 10: Prefabricated Systems Authors: K. Koo Co-authors: K. Cheung, R. Kok, R. Rempel, E. Simard, H. Yu Peer-reviewers: Y.H. Chui, M. de Lint, L. Poliquin, W. Toro 41
Chapter 10: Prefabricated Systems Prefabricated systems Wall, floor and roofing panels Certification standards CSA A277 (under revision) Qualification of prefabricated systems Transportation Future trends 42
Summary of the Overview Multi-disciplinary handbook involving a broad range of industry, research & design experts Handbook aims at providing guidelines for properly designing and detailing light-wood frame construction in agreement with provincial and national code provisions 43
Final Remarks Floor Vibration and Noise Control Durable & Efficient Building Enclosure Structural Products & Design Fire Safety Design & Construction Fire Risk Vertical Differential Movement Elevator Shafts and Stairwells Prefabricated Systems 44
Acknowledgments Natural Resources Canada Government of BC BC Forestry Innovation Investment Government of Alberta Gouvernement du Québec (MFFP) Partners Canadian Wood Council National Research Council 45
Questions/ Comments? This concludes the: American Institute of Architects Alberta Association of Architects Engineering Institute of Canada Continuing Education Systems Program Overview of the New Mid-Rise Handbook FPInnovations www.fpinnovations.ca Ph: 604.224.3221
Thank you! Conroy Lum, P.Eng. Research Leader Structural Performance Group Advanced Building Systems conroy.lum@fpinnovations.ca Follow us on www.fpinnovations.ca