Case Study: TallWood House at Brock Commons …...1. Review the structural system in the context of...

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.

“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.

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.

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.

TALLWOOD HOUSE AT BROCK COMMONS� Project Background� Design Context� Design Approach� Building Overview� Key Analysis / Design Issues� Construction� Conclusion

DESIGN TEAM

PROJECT BACKGROUND

Kamps Engineering Limited

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

� National Resources Canada (NRCan)

� Forestry Innovation Investment

� Ministry of Forests, Lands, And Natural Resource Operations

� Binational Softwood Lumber Council

PROJECT BACKGROUND

EXTERNAL FUNDING

LOCATION/CLIMATE

DESIGN CONTEXT

DESIGN CONTEXT

LOCATION/CLIMATE

DESIGN CONTEXT

COST

BRITISH COLUMBIABUILDING CODE 2012

ENGINEERING DESIGN IN WOOD

BUILDING CODES & MATERIAL STANDARDS

DESIGN CONTEXT

BRITISH COLUMBIABUILDING CODE 2012


PROCUREMENT

DESIGN CONTEXT

SUPPLIERS

DESIGN CONTEXT

SUPPLIERSCAPACITY

STARTING POINT

= 3640 m3 OFMASS TIMBER

NLT GLT

CLT LSL

LVL

DESIGN CONTEXT

DESIGN CONTEXT

SUPPLIERSCAPABILITY

KEEP IT SIMPLE

DESIGN APPROACH

DESIGN APPROACH CREDIT: SEAGATE

DESIGN APPROACH

DESIGN APPROACH

BUILDING OVERVIEW

SUPERSTRUCTURE

CREDIT: CADMAKERS

SUPERSTRUCTURE - LATERAL

CREDIT: CADMAKERSBUILDING OVERVIEW

SUPERSTRUCTURE - LATERAL

CREDIT: SEAGATEBUILDING OVERVIEW

SUPERSTRUCTURE - GRAVITY

CREDIT: CADMAKERSBUILDING OVERVIEW


CREDIT: KK LAWBUILDING OVERVIEW


CREDIT: SEAGATEBUILDING OVERVIEW

SUPERSTRUCTURE - GRAVITYPANEL LAYOUT

BUILDING OVERVIEW


CREDIT: ACTON OSTRY

ARCHITECTURE

BUILDING OVERVIEW

CREDIT: ACTON OSTRY

ENVELOPE

BUILDING OVERVIEW

TALLWOOD HOUSE AT BROCK COMMONS� Project Background� Design Context� Design Approach� Superstructure Overview� Key Analysis / Design Issues� Construction� Conclusion


BCBC 2012limited to 6-storeys

UBC an Independent Jurisdiction

British Columbia Safety Standards Branch

Site Specific Regulation

BuildingPermit

KEY ANALYSIS/DESIGN ISSUES


NBCC 2015


NBCC 2015 Vancouver

Sa(2.0) = 0.261

BCBC 2012Vancouver

Sa(2.0) = 0.170

SEISMIC ACCELLERATIONS INCREASED BY 53%


PEER REVIEWS


� Merz Kley Partners – Austria � Timber Focused

� Read Jones Christofferson – Vancouver� Seismic Focused


KEY ANALYSIS/DESIGN ISSUES MICHAEL GREEN ARCHITECTURE

FIRE


POINT SUPPORTED CLT


POINT SUPPORTED CLT


POINT SUPPORTED CLT

POINT SUPPORTED CLT


COLUMN TO COLUMN CONNECTIONS


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


Dead Load Axial

Live Load Axial

Longitudinal Shrinkage

Creep and Joint Settlement



SHIM PACKAGE

ME

CH

AN

ICA

L

TIME OF INSTALL



SHIM PACKAGE

ME

CH

AN

ICA

L

SOME TIME LATER



LATERAL DESIGN


� 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


CAPACITY DESIGNCAPACITY DESIGN

DESIGN DIAPHRAGM TO FLEXURAL CAPACITY OF CORES

DESIGN CONNECTIONS, DRAGS, CHORDS, COLLECTORS WITH OVERSTRENGTH CAPACITY

YIELDING

NO YIELDING


CAPACITY DESIGN


DIAPHRAGM DESIGN


DYNAMIC WIND ACCELERATIONS


DYNAMIC WIND ACCELERATIONS

DAMPING?

β= 1% to 3%


PRE-FABRICATION


• 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


DESIGN TEAM CADMAKERS(3D COORDINATOR)

STRUCTURLAM(TIMBER SUPPLIER)

PRE-FABRICATION


PRE-FABRICATION


• ~0.95 mmfbm in 2 months time.

PRE-FABRICATION


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


MOCK-UP

CONSTRUCTION

MOCK-UP

CONSTRUCTION

PRECAST SIP WOOD FRAME/METAL PANEL

STEEL STUD/METAL PANEL

SEQUENCING

CONSTRUCTION

CONSTRUCTION

CONSTRUCTION CREDIT: SEAGATE

CONSTRUCTION

CONSTRUCTION

CONSTRUCTION

CONSTRUCTION CREDIT: SEAGATE

CONSTRUCTION

CONSTRUCTION

CONSTRUCTION

CONSTRUCTION CREDIT: ACTON OSTRY

PROGRESS TO DATE

CONCLUSION CREDIT: NATURALLY WOOD

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

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

Questions?This concludes The American Institute of Architects Continuing Education Systems Course

Robert JacksonFast + Epp Structural Engineers

[email protected]

Case Study: TallWood House at Brock Commons …...1. Review the structural system in the context of...

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