case study: tallwood house at brock commons …...1. review the structural system in the context of...
TRANSCRIPT
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Case Study:TallWood House at Brock CommonsThe University of British Columbia
Presented on January 25, 2017 by Robert Jackson
Disclaimer: This presentation was developed by a third party and is not funded by WoodWorks or the Softwood Lumber Board.
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“The Wood Products Council” is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/CES), Provider #G516.
Credit(s) earned on completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.
This course is registered with 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 ofhandling, using, distributing, or dealing in any material or product.
___________________________________________
Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
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Course Description
When completed in the spring of 2017, the 18-story TallWood House at Brock Commons will be the tallest contemporary mass wood building in the world. An exceptional example of the advantages of timber prefabrication, this project aspires to be the model for a future that includes extraordinarily ordinary mass wood buildings. This presentation will introduce the project, discuss the various design approaches considered and explain the process used to arrive at the final solution. While providing a focused discussion on the structural design and unique engineering challenges, the presenter will also provide an introduction to the fire/life safety approach, construction methods and project coordination.
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Learning Objectives
1. Review the structural system in the context of design challenges and how/why the project team arrived at the final solution.
2. Understand the fire design approach for TallWood House.
3. Discuss the methods employed to deliver a highly prefabricated mass timber project and related construction benefits.
4. Review the cost and quality of the final solution, as well as lessons learned.
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TALLWOOD HOUSE AT BROCK COMMONS� Project Background� Design Context� Design Approach� Building Overview� Key Analysis / Design Issues� Construction� Conclusion
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TALLWOOD HOUSE AT BROCK COMMONS� Project Background� Design Context� Design Approach� Building Overview� Key Analysis / Design Issues� Construction� Conclusion
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DESIGN TEAM
PROJECT BACKGROUND
Kamps Engineering Limited
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TIMELINE
Project Contemplation
NRCFunding
Announced
DesignTeam
Selected
SSR Completed
Tender ConstructionStart
Concrete Complete,
Timber InstallStart
SuperstructureComplete
ProjectComplete
PROJECT BACKGROUND
2013
Dec
. 20
14
Sep
t. 2
015
Aug
. 201
5
Oct
. 201
5
May
201
6
Sep
t. 20
16
Sum
mer
201
7
2012
10 Months
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� National Resources Canada (NRCan)
� Forestry Innovation Investment
� Ministry of Forests, Lands, And Natural Resource Operations
� Binational Softwood Lumber Council
PROJECT BACKGROUND
EXTERNAL FUNDING
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TALLWOOD HOUSE AT BROCK COMMONS� Project Background� Design Context� Design Approach� Building Overview� Key Analysis / Design Issues� Construction� Conclusion
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LOCATION/CLIMATE
DESIGN CONTEXT
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DESIGN CONTEXT
LOCATION/CLIMATE
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DESIGN CONTEXT
LOCATION/CLIMATE
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DESIGN CONTEXT
LOCATION/CLIMATE
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DESIGN CONTEXT
COST
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BRITISH COLUMBIABUILDING CODE 2012
ENGINEERING DESIGN IN WOOD
BUILDING CODES & MATERIAL STANDARDS
DESIGN CONTEXT
BRITISH COLUMBIABUILDING CODE 2012
BUILDING CODES & MATERIAL STANDARDS
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PROCUREMENT
DESIGN CONTEXT
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SUPPLIERS
DESIGN CONTEXT
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SUPPLIERSCAPACITY
STARTING POINT
= 3640 m3 OFMASS TIMBER
NLT GLT
CLT LSL
LVL
DESIGN CONTEXT
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DESIGN CONTEXT
SUPPLIERSCAPABILITY
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TALLWOOD HOUSE AT BROCK COMMONS� Project Background� Design Context� Design Approach� Building Overview� Key Analysis / Design Issues� Construction� Conclusion
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KEEP IT SIMPLE
DESIGN APPROACH
DESIGN APPROACH CREDIT: SEAGATE
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DESIGN APPROACH
DESIGN APPROACH
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DESIGN APPROACH
DESIGN APPROACH
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DESIGN APPROACH
DESIGN APPROACH
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TALLWOOD HOUSE AT BROCK COMMONS� Project Background� Design Context� Design Approach� Building Overview� Key Analysis / Design Issues� Construction� Conclusion
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BUILDING OVERVIEW
SUPERSTRUCTURE
CREDIT: CADMAKERS
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SUPERSTRUCTURE - LATERAL
CREDIT: CADMAKERSBUILDING OVERVIEW
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SUPERSTRUCTURE - LATERAL
CREDIT: SEAGATEBUILDING OVERVIEW
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SUPERSTRUCTURE - GRAVITY
CREDIT: CADMAKERSBUILDING OVERVIEW
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SUPERSTRUCTURE - GRAVITY
CREDIT: KK LAWBUILDING OVERVIEW
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SUPERSTRUCTURE - GRAVITY
CREDIT: SEAGATEBUILDING OVERVIEW
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SUPERSTRUCTURE - GRAVITYPANEL LAYOUT
BUILDING OVERVIEW
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SUPERSTRUCTURE - GRAVITY
CREDIT: ACTON OSTRY
ARCHITECTURE
BUILDING OVERVIEW
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SUPERSTRUCTURE - GRAVITY
CREDIT: ACTON OSTRY
ARCHITECTURE
BUILDING OVERVIEW
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CREDIT: ACTON OSTRY
ENVELOPE
BUILDING OVERVIEW
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CREDIT: ACTON OSTRY
ENVELOPE
BUILDING OVERVIEW
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TALLWOOD HOUSE AT BROCK COMMONS� Project Background� Design Context� Design Approach� Superstructure Overview� Key Analysis / Design Issues� Construction� Conclusion
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BUILDING CODES & MATERIAL STANDARDS
BCBC 2012limited to 6-storeys
UBC an Independent Jurisdiction
British Columbia Safety Standards Branch
Site Specific Regulation
BuildingPermit
KEY ANALYSIS/DESIGN ISSUES
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KEY ANALYSIS/DESIGN ISSUES
NBCC 2015
BUILDING CODES & MATERIAL STANDARDS
NBCC 2015 Vancouver
Sa(2.0) = 0.261
BCBC 2012Vancouver
Sa(2.0) = 0.170
SEISMIC ACCELLERATIONS INCREASED BY 53%
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KEY ANALYSIS/DESIGN ISSUES
PEER REVIEWS
BUILDING CODES & MATERIAL STANDARDS
� Merz Kley Partners – Austria � Timber Focused
� Read Jones Christofferson – Vancouver� Seismic Focused
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BUILDING CODES & MATERIAL STANDARDS
KEY ANALYSIS/DESIGN ISSUES MICHAEL GREEN ARCHITECTURE
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FIRE
KEY ANALYSIS/DESIGN ISSUES
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FIRE
KEY ANALYSIS/DESIGN ISSUES
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FIRE
KEY ANALYSIS/DESIGN ISSUES
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FIRE
KEY ANALYSIS/DESIGN ISSUES
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KEY ANALYSIS/DESIGN ISSUES
FIRE
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POINT SUPPORTED CLT
KEY ANALYSIS/DESIGN ISSUES
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KEY ANALYSIS/DESIGN ISSUES
POINT SUPPORTED CLT
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POINT SUPPORTED CLT
KEY ANALYSIS/DESIGN ISSUES
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POINT SUPPORTED CLT
KEY ANALYSIS/DESIGN ISSUES
POINT SUPPORTED CLT
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POINT SUPPORTED CLT
KEY ANALYSIS/DESIGN ISSUES
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POINT SUPPORTED CLT
KEY ANALYSIS/DESIGN ISSUES
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POINT SUPPORTED CLT
KEY ANALYSIS/DESIGN ISSUES
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POINT SUPPORTED CLT
KEY ANALYSIS/DESIGN ISSUES
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KEY ANALYSIS/DESIGN ISSUES
POINT SUPPORTED CLT
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COLUMN TO COLUMN CONNECTIONS
KEY ANALYSIS/DESIGN ISSUES
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COLUMN TO COLUMN CONNECTIONS
KEY ANALYSIS/DESIGN ISSUES
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COLUMN TO COLUMN CONNECTIONS
KEY ANALYSIS/DESIGN ISSUES
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Δ2Δ1
TIIM
BE
R C
OLU
MN
S
TIIM
BE
R C
OLU
MN
S
CO
NC
RE
TE C
OR
E
Δ1 (CONCRETE) = SHRINKAGE + ELASTIC SHORTENING+ CREEP
Δ2 (TIMBER) = SHRINKAGE + ELASTIC SHORTENING + CREEP + JOINT SETTLEMENT
AXIAL COLUMN SHORTENING
KEY ANALYSIS/DESIGN ISSUES
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Dead Load Axial
Live Load Axial
Longitudinal Shrinkage
Creep and Joint Settlement
AXIAL COLUMN SHORTENING
KEY ANALYSIS/DESIGN ISSUES
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SHIM PACKAGE
ME
CH
AN
ICA
L
TIME OF INSTALL
AXIAL COLUMN SHORTENING
KEY ANALYSIS/DESIGN ISSUES
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SHIM PACKAGE
ME
CH
AN
ICA
L
SOME TIME LATER
AXIAL COLUMN SHORTENING
KEY ANALYSIS/DESIGN ISSUES
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AXIAL COLUMN SHORTENING
KEY ANALYSIS/DESIGN ISSUES
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LATERAL DESIGN
KEY ANALYSIS/DESIGN ISSUES
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� RdRo = 3.5 * 1.6 DUCTILE COUPLED CONCRETE SHEARWALLS ~R=5.6
� MODE 1 = E/W ORTHOGONAL, � T=2.0 SEC.
� MODE 2 = N/S ORTHOGONAL, T = 1.65 SEC.
� MODE 3 = TORSIONAL, T= 1.30 SEC.
� EQ = 4.5% OF WEIGHT
LATERAL DESIGN
KEY ANALYSIS/DESIGN ISSUES
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CAPACITY DESIGNCAPACITY DESIGN
DESIGN DIAPHRAGM TO FLEXURAL CAPACITY OF CORES
DESIGN CONNECTIONS, DRAGS, CHORDS, COLLECTORS WITH OVERSTRENGTH CAPACITY
YIELDING
NO YIELDING
KEY ANALYSIS/DESIGN ISSUES
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CAPACITY DESIGN
KEY ANALYSIS/DESIGN ISSUES
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DIAPHRAGM DESIGN
KEY ANALYSIS/DESIGN ISSUES
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DIAPHRAGM DESIGN
KEY ANALYSIS/DESIGN ISSUES
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DIAPHRAGM DESIGN
KEY ANALYSIS/DESIGN ISSUES
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DIAPHRAGM DESIGN
KEY ANALYSIS/DESIGN ISSUES
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DIAPHRAGM DESIGN
KEY ANALYSIS/DESIGN ISSUES
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DIAPHRAGM DESIGN
KEY ANALYSIS/DESIGN ISSUES
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DYNAMIC WIND ACCELERATIONS
KEY ANALYSIS/DESIGN ISSUES
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DYNAMIC WIND ACCELERATIONS
DAMPING?
β= 1% to 3%
KEY ANALYSIS/DESIGN ISSUES
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PRE-FABRICATION
KEY ANALYSIS/DESIGN ISSUES
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PRE-FABRICATION
KEY ANALYSIS/DESIGN ISSUES
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• 3D (.SAT and .IFC) models provided by CadMakers supplies general geometry – including all mechanical penetrations.
• Use of a coordinated single model saved time and reduced confusion between the multiple parties.
INFORMATION FLOW
KEY ANALYSIS/DESIGN ISSUES
DESIGN TEAM CADMAKERS(3D COORDINATOR)
STRUCTURLAM(TIMBER SUPPLIER)
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PRE-FABRICATION
KEY ANALYSIS/DESIGN ISSUES
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PRE-FABRICATION
KEY ANALYSIS/DESIGN ISSUES
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PRE-FABRICATION
KEY ANALYSIS/DESIGN ISSUES
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PRE-FABRICATION
KEY ANALYSIS/DESIGN ISSUES
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PRE-FABRICATION
KEY ANALYSIS/DESIGN ISSUES
• ~0.95 mmfbm in 2 months time.
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PRE-FABRICATION
KEY ANALYSIS/DESIGN ISSUES
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PRE-FABRICATION
• Fabrication arranged in a linear process for just in time delivery.
• Loads arranged on trucks to perfectly match installation sequenceo Requires ample preplanning on the part of the project team
KEY ANALYSIS/DESIGN ISSUES
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TALLWOOD HOUSE AT BROCK COMMONS� Project Background� Design Context� Design Approach� Building Overview� Key Analysis / Design Issues� Construction� Conclusion
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MOCK-UP
CONSTRUCTION
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MOCK-UP
CONSTRUCTION
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MOCK-UP
CONSTRUCTION
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MOCK-UP
CONSTRUCTION
PRECAST SIP WOOD FRAME/METAL PANEL
STEEL STUD/METAL PANEL
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SEQUENCING
CONSTRUCTION
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION
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CONSTRUCTION
CONSTRUCTION
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION CREDIT: SEAGATE
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CONSTRUCTION
CONSTRUCTION
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CONSTRUCTION
CONSTRUCTION
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CONSTRUCTION
CONSTRUCTION
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CONSTRUCTION
CONSTRUCTION CREDIT: ACTON OSTRY
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CONSTRUCTION
CONSTRUCTION CREDIT: ACTON OSTRY
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TALLWOOD HOUSE AT BROCK COMMONS� Project Background� Design Context� Design Approach� Building Overview� Key Analysis / Design Issues� Construction� Conclusion
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PROGRESS TO DATE
CONCLUSION CREDIT: NATURALLY WOOD
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ACHIEVEMENTS
CONCLUSION
WOOD VOLUME
COST
TIMBER INSTALL
RAIN
TOLERANCES
ESTIMATE
3600m3
192 $/ft2 (2014)
~2 FLOORS / WEEK
A LITTLE
+/- 1mm
ACHIEVED
2233m3
TBD
2 FLOORS / WEEK
A LOT!
+/- 1mm
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LESSONS LEARNED� Efficient system suitable for student residences, micro-
apartments or hotels
� Wider column grid possible with wider panels
� Keep things simple.
� Involve your trades early.
� 3D coordination paid off.
� Kit-Of-Parts prefabrication has advantages.
CONCLUSION
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Questions?This concludes The American Institute of Architects Continuing Education Systems Course
Robert JacksonFast + Epp Structural Engineers