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CLT Conference Seattle

February 28, 2013

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Solid Panel Construction and Design for Cost Effectiveness

“The Wood Products Council” is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/CES). Credit(s) earned on completion of this program 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 program 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 of handling, 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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Copyright Materials

This presentation is protected by US and International Copyright laws. Reproduction,

distribution, display and use of the presentation without written permission of

the speaker is prohibited.

© The Wood Products Council 2011

LEARNING OBJECTIVES: AT THE END OF THIS PROGRAM, PARTICIPANTS WILL BE ABLE TO

1.  Identifying the advantages and disadvantages of a variety of

solid wood panel products.

2.  Acquire current status of the joint Canada/US code

committee work

3.  Examine how solid wood panels are used in actual projects.

4.  Discover real world applications of solid wood panel projects.

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2007 World “Passivhaus” Conference

Bregenz — Austria

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What is a “Passivhaus”?

•  Sustainability rating system like LEED, but focused solely on energy

performance. Over 25,000 Passivhaus registered buildings in Europe.

•  Building must use 15 kWh/m2 or less per year in heating energy.

•  The building must not leak air at more than 0.6 house volume per

hour (n50 ≤ 0.6 / hour), when de-pressurized to 50 Pa below

atmospheric pressure by a blower door apparatus.

•  The total primary energy consumption (primary energy for heating,

hot water and electricity) must not exceed 120 kWh/m² per year.

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Timber Systems

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POST AND BEAM Centuries old

STICK FRAME Last Century

SOLID CONSTRUCTION Last 15 years

Cross Laminated

Glued Doweled Nailed

Edge Laminated

Glued Doweled Nailed

CLT

LVL

LSL

Solid Wood Panels

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Code situation

•  ANSI ANSI/APA PRG 320-2011

“Standard for Performance-Rated Cross-Laminated Timber”

•  CSA - O86.09 – “Engineering Design in Wood”

In draft form – CLT’s will be included in next printing

•  In the US, inclusion of CLT as heavy timber by 2015

• CLT Handbook published in Canada in 2011, in the US at the

first CLT conference in the US in Seattle last week.

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US CLT Handbook

• Request a free digital copy or printed copy at:

www.masstimber.com

Architecturally

•  Can be left exposed - warm and beautiful

•  Flexible

•  Good acoustic & vibration performance

•  High level of quality from prefabrication

•  Fire resistance

•  Measurable health benefits

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Credit Valley Hospital, TorontoBy Farrow Partnership

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Sustainability

•  Good thermal mass (double that of concrete by weight)

•  Good “R” value – lowers effects of heat bridges

•  Air tightness

•  Helps control interior humidity

•  Renewable

•  Sequesters CO2

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Heat bridges

Structurally

•  Excellent strength to weight ratio (governed by vibration)

•  Robust (durable and low maintenance)

•  Shallow (10 to 15% shallower than concrete)

•  1/6th of the weight of concrete

(reduces foundation and seismic loads)

•  High level of accuracy & reliability from shop fabrication

•  Dimensionally stable

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Construction

•  Fast installation

•  Economically compares well to concrete and steel construction

•  Prefabrication – reduces on-site trade demands – “mechano set” •  Appropriate for remote sites

•  Reduces M & E and finishes installation time (by ½?)

•  Clean, dust free and quite site

•  Accurate

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Unique Structural Characteristics

•  Light and rigid – vibration often governs

•  Rolling shear affects strength, deflection and creep

•  I effective increases with span because of the cross

laminations

•  Bearing perp. to grain 30 to 50% higher

•  Check punching shear

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Rules of Thumb

•  Depth to span ratios:

Floors 20 – 30

Roofs 30 - 40

•  Typical spans:

Non composite - spans of 3 to 8m (10 to 26 feet)

Composite – spans of 6 to 12m (20 to 40 feet)

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Effective Stiffness increases for longer spans

•  I effective depends on the span because X-layers alter

stiffness

I effective / I nominal:

100mm (4”) CLT 3m (10ʼ) span = 85%

4m (13ʼ) span = 90%

170mm (7”) CLT 3m (10ʼ) span = 70%

4m (13ʼ) span = 75%

6m (20ʼ) span = 80%

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Seismically

•  Panels are very strong and rigid

•  High shear capacity (≈ 4.0 MPa vs 5 MPa upper bound for RC)

•  Ductility governed by connections

•  Vertical (lap) joints in panels add to ductility

•  Rd = 2.0; Ro = 1.5 recommended by FP Innovations in the

Canadian handbook

(equivalent to R = 3.75 and Ω = 2.0 – T.B.C.)

AUSTRIA HOUSE


“PASSIVHAUS” CONSTRUCTION

DOWLING RESIDENCE

Greg Dowling — West Vancouver

DGBK Architects

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ECOLE au COEUR de LʼILE

Conseil Scolaire francophone de la Colombie Britanique — COMOX, BC

MCFARLAND MARCEAU ARCHITECTS

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SHERPA

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•  Proprietary system from Germany

•  Consists of an aluminum dovetail connection

fastened to the timber with self-tapping screws

•  Fast erection

•  Completely invisible

•  Fire protected

UBC GASIFICATION BUILDING

University of British Columbia — Vancouver, BC


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Upper Floor Plan-Control Level

Biomass Research and Demonstration Project, University of British ColumbiaVancouver, British Columbia

Using biomass for direct substitution of fossil fuels or fossil fuel intensive materials is an important means of reducing greenhouse gas emissions as it provides permanent and cumulative reduction in CO2 emission, whereas sequestration or conservation of carbon is typically limited or temporary.

-”The Role of Forest and Bioenergy Strategies in the Global Carbon Cycle”-B. Schlamadinger, G. Marland

FORT MCMURRAY AIRPORT

Fort McMurray Airport Authority — Fort McMurray, Alberta

OFFICE MACFARLANE + BIGGAR ARCHITECTS

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RONALD MCDONALD HOUSE

BC Childrenʼs Hospital — Vancouver

MICHAEL GREEN ARCHITECTURE



PROMEGA GMP FACILITY

Promega Corporation — Fitchburg, WI

ARCHITECT: UIHLEIN-WILSON ARCHITECTS ENGINEER: EWINGCOLE, PHILADELPHIA, PA



eqcanada.com Photo courtesy of Woodworks – Bill Billups

Photo courtesy of Woodworks – Bill Billups Photo courtesy of Woodworks – Bill Billups

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ARTS STUDIO CANOPY

Capilano University — North Vancouver

TDK Architecture

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City of North Vancouver — North Vancouver, BC

MICHAEL GREEN ARCHITECTURE

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NORTH VANCOUVER CIVIC CENTRE

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University of BC — Ckelowna, BC


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UBC OKANAGAN FITNESS CENTRE

Photo courtesy of Nicola Logwork – John Boys

Photo courtesy of Nicola Logwork – John Boys Photo courtesy of Woodworks – Bill Billups

Photo courtesy of Woodworks – Bill Billups Photo courtesy of Woodworks – Bill Billups

Photo courtesy of Woodworks – Bill Billups Photo courtesy of Woodworks – Bill Billups Photo courtesy of Nicola Logwork – John Boys


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AUDAIN MUSEUM

Whistler, BC

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PATKAU ARCHITECTS


UBC — Vancouver ,BC

PERKINS + WILL ARCHITECTS

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UBC Earth Sciences

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SOUTH WING —

CONCRETE

NORTH WING —

TIMBER

INNOVATIVE TIMBER ELEMENTS

•  Post and beam connections

•  Wood-concrete composite floor systems.

•  Transfer trusses over lecture theatres.

•  Chevron braces.

•  CLT canopy and roof structure.

•  The Flying Stair.

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EARTH SCIENCES BUILDING — Vancouver, BC








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SECTION — TYPICAL OFFICE FLOORS

Holz-Beton-Verbund-System™ (HBV) Composite floor








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Client LECTURE THEATRE

Client LECTURE THEATRE

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LARGE WOOD AIRPORT

Title of Project —

City, Province

Client








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A 5-storey,

free-floating,

cantilevered

solid timber staircase.

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LARGE WOOD AIRPORT

Title of Project — City, Province

Client


LARGE WOOD AIRPORT


Client


LARGE WOOD AIRPORT


Client



LARGE WOOD AIRPORT


Client


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LARGE WOOD AIRPORT


Client

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LARGE WOOD AIRPORT


Client

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QUESTIONS?

This concludes The American Institute of Architects

Continuing Education Systems Course


J Eric Karsh, M.Eng., P.Eng., Struct.Eng., MIStructE, Ing

[email protected]

604 730 1422

Equilibrium Consulting Inc.

202-388 West 8th Avenue, Vancouver BC, Canada

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eqcanada - woodworksin draft form – clt’s will be included in next printing • in the us,...

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