Th W d P d t C ilThe WoodProducts Council” i R i t d P id ... · “Th W d P d t C ilThe WoodProducts Council” i R i t d P id ithis a RegisteredProvider with The American Institute

Cross Laminated TimberTechnology: Manufacturing,

Cross Laminated TimberTechnology: Manufacturing,Technology: Manufacturing,Materials and SpecificationTechnology: Manufacturing,Materials and Specification

“Th W d P d t C il” i R i t d P id ith Th“The Wood Products Council” is a Registered Provider with TheAmerican 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 AIAAIA/CES for AIA members. Certificates of Completion for both AIAmembers and non-AIA members are available upon request.

This program is registered with AIA/CES for continuing professionalThis program is registered with AIA/CES for continuing professionaleducation. 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,y g gdistributing, or dealing in any material or product.

Questions related to specific materials, methods, and services willQuestions related to specific materials, methods, and services willbe addressed at the conclusion of this presentation.

Copyright Materials

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

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

prohibitedprohibited.

© The Wood Products Council 2013© The Wood Products Council 2013

Learning ObjectivesLearning Objectives

At the end of this program, participants will be able to:

1. Attendees will understand the process by which ANSI/APA PRG 320 CLT1. Attendees will understand the process by which ANSI/APA PRG 320 CLTStandard and product certification processes were developed.

2. Attendees will observe key steps in the CLT manufacturing process and learn about the current state of production in North Americaabout the current state of production in North America

3. Attendees will observe resources such as APA Product Reports for CLT manufacturers for guidance in Designer Specifications

4. Attendees will Standard CLT grades and design properties and will be implemented through building codes

CLT M f t iCLT Manufacturing1) Scope2) Key steps for CLT manufacturing processes) y p g p3) ANSI/APA PRG 320 CLT Standard4) Standard CLT grades and design properties5) Custom products6) Product certification7) Conclusion7) Conclusion

A f b i t d lid i d d l d fA prefabricated solid engineered wood panel made ofat least three orthogonally bonded layers of solid-sawn lumber or structural composite lumber (SCL) that are laminated by gluing of longitudinal and transverse layers with structural adhesives to form a solid rectangular-shaped, straight, and plane timbersolid rectangular shaped, straight, and plane timberintended for roof, floor, or wall applicationsMechanically connected or non-face-bonded CLTs are outside the scope

Alternate plies and layersAlternate plies and layers

3-ply 3-layer 5-ply 3-layer

5-ply 5-layer 7-ply 5-layer

6-ply 5-layer 8-ply 5-layer

9-ply 9-layer 9-ply 7-layer

CLT M f t iCLT Manufacturing1) Scope2) Key steps for CLT manufacturing) y p g3) ANSI/APA PRG 320 CLT Standard4) Standard CLT grades and design properties5) Custom products6) Product certification7) Conclusion7) Conclusion

L bLumberSpeciesGrades

JointsEnd jointsFace jointsFace jointsEdge joints

AdhesivesPressingCuring

Reference: Holzbau Unterrainer

L b iLumber processingGrading, MC check, cutting, end-jointing, planing

Adhesive application and CLT layuppp y pPressing and curingCLT processingQA and trademarkingPackaging and shipment

L b iLumber processingGrading, MC check, cutting, end-jointing, planing

Reference: Brettsperholz.org

Adh i li ti d lAdhesive application and layup

Reference: Brettsperholz.org

P i d iPressing and curing

Reference: Brettsperholz.org

Courtesy Nordic Engineered Wood

CLT iCLT processing

Reference: Brettsperholz.orgp g

Courtesy Nordic Engineered Wood

CLT M f t iCLT Manufacturing1) Scope2) Key steps for CLT manufacturing processes) y p g p3) ANSI/APA PRG 320 CLT Standard4) Standard CLT grades and design properties5) Custom products6) Product certification7) Conclusion7) Conclusion

All CLT j t i N thAll CLT projects in NorthAmerica so far have been based on case-by-case approval by local jurisdictionsTo facilitate productTo facilitate productacceptance, consensus-based product and design standards are essential

Courtesy Structurlam

Consensus basedConsensus-basedstandard for code adoptionConsistent product quality and reliabilityIndependent third partIndependent third-partyinspectionImproved product

Courtesy Nordic Engineered Wood

p pavailabilityDesigners can focus on d i d i tidesign and innovation

A ANSI dit dAs an ANSI-accreditedstandards developer, APA initiated the developmentpof ANSI/APA PRG 320, Performance Standard for Cross-Laminatedfor Cross-LaminatedTimber, in 2010Approved by ANSI in December 2011

O POpen Process35 Voting members: 18 U.S., 16 CAN, and 1 EU22 Observers: 12 U.S., 7 CAN, and 3 Australians

Balanced Interest4 Manufacturers, 8 Suppliers, 7 Users, and 12 General InterestsInterests

Intended for a bi-national (U.S. and Canada) standard

Th t i iThe current version isPRG 320-2012, approved by ANSI in October 2012y

K C id tiKey ConsiderationsDry-UseKiln dried lumber (12%) or SCL laminationsKiln-dried lumber (12%) or SCL laminationsSpecies – Any softwood species meeting PS20 or CSA O141 and a specific gravity of 0.35 or p g yhigherOutermost layers – minimum 1200f-1.2E MSR or VG N 2VG No. 2Core layers – minimum VG No. 3

K C id ti ( ti d)Key Considerations (continued)Lamination thickness: 5/8” to 2” due to face bond considerationbond considerationNet lamination width:

1.75 x thickness for parallel layers (i.e., 2x3)3.5 x thickness for perpendicular layers (i.e., 2x6) due to interlaminar shear and creep consideration for non-edge bonded layers unless proven otherwise by testing

K C id ti ( ti d)Key Considerations (continued)Max CLT thickness: 20”CLT tolerance at the time of manufacturingCLT tolerance at the time of manufacturing

Thickness: ± 1/16” or 2%, whichever is greaterWidth: ± 1/8”Length: ± 1/4”

K C id ti ( ti d)Key Considerations (continued)Adhesives

U S : AITC 405 + PS1 Heat PerformanceU.S.: AITC 405 + PS1 Heat PerformanceCanada: CSA O112.10 + ASTM D7247 Heat durability + PS1 Heat Performancey

Mandatory requirements for end joints and face jointsNon-mandatory for edge joints

CLT M f t iCLT Manufacturing1) Scope2) Key steps for CLT manufacturing processes) y p g p3) ANSI/APA PRG 320 CLT Standard4) Standard CLT grades and design properties5) Custom products6) Product certification7) Conclusion7) Conclusion

St d d CLT dStandard CLT grades4 “E-Rated” CLT gradesE1: 1950f 1 7E SPF MSR (//) + No 3 SPF ( )E1: 1950f-1.7E SPF MSR (//) + No. 3 SPF ( )E2: 1650f-1.5E DF-L MSR (//) + No. 3 DF-L ( )E3: 1200f-1 2E ES NS or WW (//) + MSR No 3 ESE3: 1200f 1.2E ES, NS, or WW (//) + MSR No. 3 ES,NS, or WW ( )E4: 1950f-1.7E SP MSR (//) + No. 3 SP ( )

St d d CLT d ( ti d)Standard CLT grades (continued)3 “Visually-Graded” CLT gradesV1: No 2 DF L (//) + No 3 DF L ( )V1: No. 2 DF-L (//) + No. 3 DF-L ( )V2: No. 1/No. 2 SPF (//) + No. 3 SPF ( )V3: No 2 SP (//) + No 3 SP ( )V3: No. 2 SP (//) + No. 3 SP ( )

Appearance classifications are included in the non-mandatory Appendixthe non mandatory Appendix

Properties are determined in accordance with the “Shear Analogy” modelOther models are permissible if approved by an approved agency

A ti f h i l d li f l bAssumptions of some mechanical moduli of lumberin the model:

E90 = E0 / 30E90 E0 / 30G0 = E0 /16G90 = G0 / 10 = E0 / 16090 0 0

CLT M f t iCLT Manufacturing1) Scope2) Key steps for CLT manufacturing processes) y p g p3) ANSI/APA PRG 320 CLT Standard4) Standard CLT grades and design properties5) Custom products6) Product certification7) Conclusion7) Conclusion

It is impractical to list all possible CLT layupsCustom CLT gradesCustom CLT gradesare permitted when approved by an

d iapproved agency inaccordance with the qualification and mechanical test requirements specified in PRG 320

Courtesy Structurlam

in PRG 320

The designers are encouraged to contact CLT manufacturers for available, optimized, and economical custom products forcustom products forproject needs

Courtesy Structurlam

CLT M f t iCLT Manufacturing1) Scope2) Key steps for CLT manufacturing processes) y p g p3) ANSI/APA PRG 320 CLT Standard4) Standard CLT grades and design properties5) Custom products6) Product certification7) Conclusion7) Conclusion

Nordic Engineered Wood Chibougamau QuebecNordic Engineered Wood, Chibougamau, Quebec Structurlam Penticton British ColumbiaStructurlam, Penticton, British Columbia

SmartLam Montana U S ASmartLam, Montana, U.S.A. Others plants:Others plants:CST Innovations, BC, CanadaMontana U S (in planning)Montana, U.S. (in planning)Eastern U.S. (in planning)

ANSI/APA PRG 320 2011 has been approved by the IBCANSI/APA PRG 320-2011 has been approved by the IBCStructural Committee for adoption into the 2015 IBCCLT manufactured to PRG 320 is recognized as a code-compliant construction material in the U Scompliant construction material in the U.S.Adoption of PRG 320-2012 is expected for the 2015 IRCCanadian code adoption in CSA O86 is underway

J t lik t t t l dJust like most structural woodproducts, a product certification by an independent third-party agency is required in accordance with PRG 320In the U S the third partyIn the U.S., the third-partymust be accredited under ISO 17020In Canada, the third-party must be accredited under ISO 65

A d 2015 IBC i iApproved 2015 IBC provisions: Th CLT t bThe CLT must bequalified based on a mechanics-based model and confirmed by qualification tests of

Gluebond durabilityGluebond durability,Full-scale bending, andFull-scale shear

The CLT must be under a quality assurance program audited by an Mechanical tests being conducted at FPInnovations, Quebecp g yapproved agency

Th CLT d t i f ith PRG 320The CLT products in conformance with PRG 320must be identified with marks containing

CLT gradeCLT thickness or identificationMill name or identification numberApproved agency name or logoApproved agency name or logoSymbol of “ANSI/APA PRG 320”“Top” stamp on the top face of custom CLT panels used for roof or floor if manufactured with an unbalanced layupfor roof or floor if manufactured with an unbalanced layup

Th dThe approved agency may provide documentation for product certificationFor example, APA provides Product Reports for CLT certificationcertification(www.apawood.org)

CLT M f t iCLT Manufacturing1) Scope2) Key steps for CLT manufacturing processes) y p g p3) ANSI/APA PRG 320 CLT Standard4) Standard CLT grades and design properties5) Custom products6) Product certification7) Conclusion7) Conclusion

ANSI/APA PRG 320 id b dANSI/APA PRG 320 provides a consensus-basedstandard for CLT products that can be used as a basis for the CLT design standardConsistent product quality provided by the product standard is important for the broad acceptance of CLT productsCLT products

CLT in conformance with the ANSI/APA PRG 320 standardCLT in conformance with the ANSI/APA PRG 320 standardEnd-use applicationThickness and dimensionsDesign capacities (FbS, EIeff, and GAeff in major and minor strength directions)Appearance classification (if any)Appearance classification (if any)Prefabrication requirements according to design drawingsTrademark and certificatesProtection for shipment

Questions?Questions?

This concludes The AmericanInstitute of Architects ContinuingEducation Systems Course

Bryan Readling, [email protected]

Courtesy Nordic Engineered Wood