MASS TIMBER BUILDINGS...2020/08/13 · Round Timber Poles and Piles 7. Prefabricated Wood I-Joists...

8/6/2020

Copyright © 2020 American Wood Council.All rights reserved. 1

MASS TIMBER BUILDINGS

AND THE IBC

Introduction to Mass Timber Products DES620

James B. Smith, P.E.Midwest Regional ManagerAmerican Wood Council 2

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Disclaimer (Required by our lawyers)

This presentation is intended to provide general information only and does not constitute professional or engineering advice. No participant or user should act on the basis of any material contained in the presentation without obtaining proper professional advice specific to their situation. Further, the views expressed by speakers or other third parties are those of the speaker or third-party and not, necessarily, of AWC.

With regard to any information presented by a speaker or third-party, AWC does not make any warranty, express or implied, including the warranty of fitness for a particular purpose, and AWC specifically disclaims any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, product, service or process presented. Furthermore, the presentation of any material or information does not constitute or imply AWC’s endorsement of such.

© American Wood Council 2020

Disclaimer (Required by our lawyers)

This webinar is intended to provide general information only and does not constitute professional or engineering advice. No participant or user should act on the basis of any material contained in the webinar without obtaining proper professional advice specific to their situation. Further, the views expressed by speakers or other third parties are those of the speaker or third-party and not, necessarily, of AWC.

With regard to any information presented by a speaker or third-party, AWC does not make any warranty, express or implied, including the warranty of fitness for a particular purpose, and AWC specifically disclaims any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, product, service or process presented. Furthermore, the presentation of any material or information does not constitute or imply AWC’s endorsement of such.

Please note that this webinar is being recorded and by remaining a participant you automatically consent to such recordings. If you do not consent to being recorded, please disconnect from the session.


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American Wood Council and International Code Council are a Registered Providers with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.

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

AIA

Mass Timber and the IBC 5

This presentation is protected by U.S. and International Copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is

prohibited.


© International Code Council 2020

Copyright Materials


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This presentation will provide an overview of mass timber which includes any product currently permitted for use in Type IV (heavy timber) construction such as cross‐laminated timber (CLT), structural composite lumber (SCL), glued laminated timber (glulam), mechanically laminated decking (a.k.a. nail‐laminated timber or NLT), and large section sawn timbers. NLT, glulam, SCL, and solid sawn timbers have been adopted in the International Building Code (IBC) and utilized throughout the world for several decades on a wide variety of buildings. CLT was first incorporated in AWC's 2015 National Design Specification® (NDS®) for Wood Construction as well as ICC’s 2015 International Building Code (IBC). All mass timber products offer sustainable qualities as they are manufactured from a renewable resource and store carbon. Structural and fire protection characteristics of mass timber will be discussed as well as IBC code provisions that allow their specification in both residential and commercial applications for a wide variety of occupancies.

Description


Learning Objectives • Identify code acceptance of mass timber

products.

• Describe technology advances and standards related to mass timber products.

• Recognize the unique fire resistive characteristics of mass timber as it influences the use of wood in building construction.

• Describe the application of NDS Chapter 16 which can be utilized to design up to 2‐hours of fire‐resistance for exposed wood members.


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Mass Timber Series• Module 1 Introduction to Mass Timber Products• Module 2 What’s New in 2015/2018 IBC for Mass

Timber Construction?• Modules 3-6 Tall Mass Timber Construction per

2021 IBC• Module 3 Part 1: Background and Overview • Module 4 Part 2: Heights & Areas and

Construction Fire Safety• Module 5 Part 3: Fire Safety• Module 6 Part 4: Fire and Connection Design

and Special Inspection


Youare here

PARTICIPATION

• Use the chat box to ask questions …

Enjoy!

Have Fun!

Ask Questions!

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Poll Question #11. What is your profession?

a) Architect

b) Engineer

c) Code Official

d) Fire Service

e) Builder/Manufacturer/Other


Standard for Engineered Wood Design


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Outline Introduction to Mass Timber Products

Various Types of Mass Timber Products Code Acceptance Technology Application

Concepts of Fire Resistance Design


Introduction to Mass Timber Products What are all these acronyms?• Sawn Lumber

• Heavy Timber – HT• Glued Laminated Timber

• Beam or column – Glulam • Floor or roof slab – GLT

• Mechanically Laminated Decking• Nail-Laminated Timber – NLT • Dowel-Laminated Timber – DLT

• Structural Composite Lumber – SCL• Laminated Veneer Lumber – LVL• Parallel Strand Lumber – PSL• Laminated Strand Lumber – LSL• Oriented Strand Lumber – OSL

• Cross-Laminated Timber – CLT• Mass Plywood Panels – MPP

This Photo by Unknown Author is licensed under CC BY-ND


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Traditional Stick Frame Construction


Mass Timber Elements are NOT Light-Frame


… but Mass Timber elements can be used in all construction types

<‐‐>

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Where is Mass Timber Allowed in the IBC?


• Types I & II – generally noncombustible inside and out

• Heavy Timber allowed for limited roof applications in Type I‐B & Type II

• Type III – noncombustible exterior walls, but interior any material

• Types IV & V – generally combustible• Type V includes any material permitted

LeMay – America’s Auto Museum – Tacoma, WACourtesy of APA‐The Engineered Wood Association

ONLY Mass Timber combustible elements can be used for Tall Mass Timber Buildings


Types IV‐A, IV‐B, and IV‐C in the 2021 IBC

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Minimum Sizes for Mass Timber


• CLT minimum thicknesses• Floors – 4” actual

• Roofs – 3” nominal

• Exterior Walls in Type IV – 6” with limitations (see 602.4.2)

Table 2304.11 MINIMUM DIMENSIONS OF HEAVY TIMBER STRUCTURAL MEMBERS

Supporting

Min. Nom. Solid SawnSize

Min.Glulam Net Size Min. SCL Net Size

Width (in.) Depth (in.) Width (in.) Depth (in.) Width (in.) Depth (in.)

Floor or

Floor/Roof

8 8 6¾ 8¼ 7 7½

6 10 5 10½ 5¼ 9½

Roof Only

6 8 5 8¼ 5¼ 7½

6 6 5 6 5¼ 5½

4 6 3 67/8 3½ 5½

Spelled out in 602.4 and 2304.11

What is Allowed by Codes?


• Sawn Lumber (Timbers)• Glued Laminated Timber• Mechanically Laminated

• Nail-Laminated Timber (NLT) • Dowel-Laminated Timber (DLT)

• Structural Composite Lumber (SCL)• Laminated Veneer Lumber (LVL)• Parallel Strand Lumber (PSL)• Laminated Strand Lumber (LSL)• Oriented Strand Lumber (OSL)

• Cross-Laminated Timber (CLT)• Mass Plywood Panels (MPP)

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Sawn Lumber (Timbers)


•Beams and Stringers

•Posts and Timbers

Butler Building – MinneapolisCourtesy of WoodWorks

Code AcceptanceGrading practices and identification shall comply with rules published by an agency approved in accordance with the procedures of DOC PS 20 or equivalent IBC 2301.1.1


Photo Courtesy of Bensonwood

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Code-referenced StandardNational Design Specification for Wood Construction Design Values Supplement


Sawn Lumber Design: 2018 NDS1. General Requirements for Building Design2. Design Values for Structural Members3. Design Provisions and Equations4. Sawn Lumber5. Structural Glued Laminated Timber6. Round Timber Poles and Piles7. Prefabricated Wood I-Joists8. Structural Composite Lumber9. Wood Structural Panels10. Cross-laminated Timber11. Mechanical Connections12. Dowel-Type Fasteners13. Split Ring and Shear Plate Connectors14. Timber Rivets15. Special Loading Conditions16. Fire Design of Wood Members


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1. Sawn Lumber Grading Agencies2. Species Combinations3. Section Properties4. Reference Design Values

• Sawn Lumber and Timber• MSR and MEL• Decking• Non-North American Sawn Lumber• Structural Glued Laminated Timber• Timber Poles and Piles

2018 NDS Supplement


Sawn Lumber(Beams & Stringers/Posts & Timbers)

Beams and StringersPosts and Timbers• Readily available• Western species 4x, 6x and 8x (possibly 20x)• Southern Pine 2x (built-up)• 8’ to 20’ lengths (2’ increments)NOTE: always check for local availability


Photos Courtesy of Bensonwood

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Manufacturing sizes Nominal vs. Actual

Dry vs. Green


Photos Courtesy of Fraserwood

Sawn Lumber(Beams & Stringers/Posts & Timbers)

Poll Question #22. In what chapter of the NDS will you find the design

requirements for sawn lumber?

a. 4

b. 6

c. 8

d. 10


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Glued Laminated Timber STRUCTURAL GLUED LAMINATED TIMBER = Glued laminated timber = Glulam composite of lumber laminations bonded with adhesives


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Glued Laminated Timber -GlulamGlulam – when used as a beam or column


Photo courtesy of naturallywood.com. Photo - Steven Errico

Glulam – Characteristics• Wood laminations bonded together

• Wood grain runs parallel to length

• Typical Widths• 3‐1/8”, 3‐1/2”, 5‐1/8”, 5‐1/2” and 6‐3/4” (possibly to 10‐3/4”)

• Widths vary by species

• Laminations• 1‐3/8" for Southern Pine

• 1‐1/2" for Douglas Fir


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Glued Laminated Timber -GLTGLT – when used as a panel

Graphics provided by FPInnovations


Code Acceptance IBC 2303.1.3 ‐ Structural glued laminated timber manufactured and identified as required Qualification and quality assurance

On‐going third‐party inspection

Grademark meeting ANSI A190.1

D 3737: Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam)

Commonly uses sawn lumber ‐ DOC PS 20


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Marking per ANSI/APA A190.1

Appearance Grade

Structural Grade Designation

Wood Species

Laminating SpecificationApplicable Standard


Glulam Design: 2018 NDS1. General Requirements for Building Design2. Design Values for Structural Members3. Design Provisions and Equations4. Sawn Lumber5. Structural Glued Laminated Timber6. Round Timber Poles and Piles7. Prefabricated Wood I-Joists8. Structural Composite Lumber9. Wood Structural Panels10. Cross-laminated Timber11. Mechanical Connections12. Dowel-Type Fasteners13. Split Ring and Shear Plate Connectors14. Timber Rivets15. Special Loading Conditions16. Fire Design of Wood Members


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2018 NDS Supplement


Finger Jointing Using RF Curing

In-line bending proof loader Mass Timber and the IBC 38

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Pre-Adhesive Layup

Lumber typically color-coded by grade Mass Timber and the IBC 39

Face Bonding


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Clamping and Curing


Fabrication & Finishing


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Church in Louisville, KY

12-1/4” x 84”140 ft. clear span


Architect: Miller Hull PartnershipStructural Engineer: DCI EngineersPhoto Credit: Miller Hull Partnership

Bullitt Center – Seattle, WA


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Architect: Miller Hull PartnershipStructural Engineer: DCI EngineersPhoto Credit: Miller Hull Partnership

Bullitt Center – Seattle, WA•Glulam beams and columns

•Nail-laminated timber floors and roof


Raleigh Durham Airport


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Cathedral of Christ the Light - Oakland


Design Team: Skidmore Owings & Merrill, Craig W. HarmanWebcore BuildersGlulam Manufacturer: Western Wood StructuresPhoto Credit: Timothy Hursley, Cesar Rubio, and John Blaustein

Cathedral of Christ the Light - Oakland


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Fire House - Multnomah County, OR

Owner: Multnomah County Rural Fire Protection District 10. OregonArchitect: Hennebery Eddy Architects, Inc

Photo by Josh ParteeMass Timber and the IBC 49

Denver – Platte15


OZ Architecture/JB Buck

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Poll Question #3


3. What standard spells out the grademarkrequirement for structural glued laminated timber?

a. DOC PS 20b. ANSI/APA A190.1c. ASTM D3737d. All the above







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What is Nail-Laminated Timber?


Code Acceptance


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Code Acceptance 2304.9.3 Mechanically laminated decking.Mechanically laminated decking shall

comply with Sections 2304.9.3.1 through 2304.9.3.3.

2304.9.3.1 General. Mechanically laminated decking consists of square‐edged dimension lumber laminations set on edge and nailed to the adjacent pieces and to the supports.

2304.9.3.2 Nailing. The length of nails connecting laminations shall not be less than two and one‐half times the net thickness of each lamination. Where decking supports are 48 inches (1219 mm) on center (o.c.) or less, side nails shall be installed not more than 30 inches (762 mm) o.c. alternating between top and bottom edges and staggered one‐third of the spacing in adjacent laminations. Where supports are spaced more than 48 inches (1219 mm) o.c., side nails shall be installed not more than 18 inches (457 mm) o.c. alternating between top and bottom edges and staggered one‐third of the spacing in adjacent laminations. Two side nails shall be installed at each end of butt‐jointed pieces.

Laminations shall be toenailed to supports with 20d or larger common nails. Where the supports are 48 inches (1219 mm) o.c. or less, alternate laminations shall be toenailed to alternate supports; where supports are spaced more than 48 inches (1219 mm) o.c., alternate laminations shall be toenailed to every support.

2304.9.3.3 Controlled random pattern. There shall be a minimum distance of 24 inches (610 mm) between end joints in adjacent courses. The pieces in the first and second courses shall bear on at least two supports with end joints in these two courses occurring on alternate supports. A maximum of seven intervening courses shall be permitted before this pattern is repeated.


Sawn Lumber Design: 2018 NDS1. General Requirements for Building Design2. Design Values for Structural Members3. Design Provisions and Equations4. Sawn Lumber5. Structural Glued Laminated Timber6. Round Timber Poles and Piles7. Prefabricated Wood I-Joists8. Structural Composite Lumber9. Wood Structural Panels10. Cross-laminated Timber11. Mechanical Connections12. Dowel-Type Fasteners13. Split Ring and Shear Plate Connectors14. Timber Rivets15. Special Loading Conditions16. Fire Design of Wood Members


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2018 NDS Supplement


Nail-Laminated Timber

Courtesy: StructureCraft


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Courtesy : StructureCraft





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Architect: Profeta Royalty ArchitectureStructural Engineer: Structural Focus 2011

Nail-Laminated TimberWarner Drive project in Culver City, CA• Nail‐Laminated Timber – 2x12 vertical• Mechanically connected w/nails• NDS principles of mechanics


Design Team: Perkins + Will Canada, Fast + Epp Photo Credit: Stephan Pasche


Nail-Laminated Timber Samuel Brighouse Elementary School (Richmond, BC)


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Architect: DLR Grouphttps://vimeo.com/162580838

Nail-Laminated Timber T3 – Minneapolis

Glued & Nail‐laminated Timber – vertical 2x sawn lumber mechanically connected w/nails

Engineered with NDS principles of mechanics

7 Stories total

6 Stories Type IV Construction

1 Story Type 1‐A Podium

IBC Section 510


Nail-Laminated Timber Handbook Architecture

Fire

Structure

Enclosures

Supply & Fabrication

Construction & Installation

Erection Engineering


https://www.thinkwood.com/products-and-systems/mass-timber/nltguide

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Dowel-Laminated Timber

Mass Timber and the IBC 65��



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Dowel-Laminated Timber111 E. GrandDes Moines, IA

Mass Timber and the IBC 67Photo provided by B.Bishop



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Poll Question #44. Which project did NOT use nail‐laminated timber (NLT) as a

building element?

a. Samuel Brighouse Elementary School (Richmond, BC)

b. Cathedral of Christ the Light (Oakland, CA)

c. Hines T3 (Minneapolis, MN)

d. Warner Drive (Culver City, CA)








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Structural Composite Lumber (SCL)•PSL – Parallel Strand Lumber•LSL – Laminated Strand Lumber•LVL – Laminated Veneer Lumber•OSL – Oriented Strand Lumber


The grain of all veneers is parallel to the long direction

SCL – Features & Applications Laminated Veneer Lumber (LVL) Produced by bonding thin veneers together Used for beams, headers, rafters & scaffold planking

Common Thicknesses 1‐3/4" to 7”

Depths 5‐1/2” – 24”

Lengths Up to 60’


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Code Acceptance 2303.1.10 Structural composite lumber. Structural capacities…in accordance with ASTM D 5456

D 5456: Specification for Evaluation of Structural Composite Lumber Products


SCL Design: 2018 NDS1. General Requirements for Building Design2. Design Values for Structural Members3. Design Provisions and Equations4. Sawn Lumber5. Structural Glued Laminated Timber6. Round Timber Poles and Piles7. Prefabricated Wood I-Joists8. Structural Composite Lumber9. Wood Structural Panels10. Cross-laminated Timber11. Mechanical Connections12. Dowel-Type Fasteners13. Split Ring and Shear Plate Connectors14. Timber Rivets15. Special Loading Conditions16. Fire Design of Wood Members


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SCL – Features & Applications Features Wood veneers or strands primarily oriented in the same direction

Strong when face‐ or edge‐loaded Milled (sawn) to consistent sizes

Strength Properties APA publishes strength properties See manufacturer criteria


Poll Question #55. Which of the following materials is categorized as Structural

Composite Lumber (SCL)?

a. GLT

b. CLT

c. NLT

d. LVL


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Cross-Laminated Timber


Photos provided by FPInnovations

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Code Acceptance 2303.1.4 Structural glued cross‐laminated timber is to be manufactured and identified in accordance with ANSI/APA PRG 320


CLT Design: 2018 NDS1. General Requirements for Building Design2. Design Values for Structural Members3. Design Provisions and Equations4. Sawn Lumber5. Structural Glued Laminated Timber6. Round Timber Poles and Piles7. Prefabricated Wood I-Joists8. Structural Composite Lumber9. Wood Structural Panels10. Cross-laminated Timber11. Mechanical Connections12. Dowel-Type Fasteners13. Split Ring and Shear Plate Connectors14. Timber Rivets15. Special Loading Conditions16. Fire Design of Wood Members


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History of CLT 1985 1st CLT patent ‐ France

1993 1st CLT projects ‐ Switzerland and Germany

1995‐1996 Improved press technology

1998 1st multi‐story res building ‐ Austria

Early 2000’s CLT use (Europe) increased significantly

Green building movement driven

Better efficiencies, product approvals, improved marketing and distribution channels

Over 500 CLT buildings in England

Recent ‐ US and Canadian use of CLT


CLT Press & Assembly Line

Photos Courtesy of KaterraMass Timber and the IBC 82

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CLT Manufacturing Process


CLT Manufacturing Process


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Ready to Ship

Mass Timber and the IBC 85Photo Courtesy of Katerra

Typical Construction Details


Double surface spline

Internal spline

Single surface spline Half-lapped

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Typical Panel Connectors


Typical Panel Connectors


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Shake Table Test7‐story CLT Building – 2007

Conducted at E‐Defense

Building weight 270t Self‐weight 120t Added weight 150t

Panel thickness 5.5” floors 1 and 2 4.9” floors 3 and 4 3.3” top 3 floors

Wall panels length 7.5’


7.5m 13.5m

23.5m 77.1’

24.6’44.3’

Shake Table Tests on 7-Story Building

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CLT – Fitchburg, WI Factory

Promega Feynman Center

Fitchburg, WI


Owner: Promega CorporationArchitect: Uihlein-Wilson

Photos by J.B. Smith

Photo: LendLease

CLT – Huntsville, AL Private Army Hotel – Redstone Arsenal

Four stories and 58,000 sq ft


Owner/GC: Lendlease (US) Public Partnerships LLCArchitect: Leidos (now Benham)Structural Engineer: Schaefer Structural Engineers

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CLT – Huntsville, AL




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CLT – Blast Testing

Mass Timber and the IBC 98��

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CLT – Franklin, WV Elementary School

46,200 sq. ft.

8‐week assembly

Architect: MSES Architects Fairmont, WV


��

��

CLT – Franklin, WV Elementary School


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CLT – Canadian Projects The Arbora

Québec, Canada 8 Stories 434 Residential condos, townhouses and rentals


CLT and Glulam – Vancouver, BC Brock Commons 18 Stories Mixed use student housing

Glulam columns

CLT floors


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Mass Timber Worldwide

www.Thinkwood.com/tallerwood ��


Mass Plywood Panel - MPP SCL‐based “panel” or slab

Alternative to CLT

Like LVL – parallel laminations


Photo Courtesy Freres Lumber

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Code Acceptance 2303.1.4 Just as with CLT, Mass Plywood Panels are to be manufactured and identified in accordance with ANSI/APA PRG 320


Mass Plywood Panel

Photos Courtesy of Freres Lumber


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Poll Question #6


6. In what country was CLT first patented?a. Austriab. France c. Germanyd. Switzerland

OutlineIntroduction to Mass Timber ProductsCode AcceptanceTechnologyApplication

Concepts of Fire‐Resistance Design


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Code Acceptance 2018 IBC 722.1 references 2018 NDS Chapter 16


Fire Design: 2018 NDS1. General Requirements for Building Design2. Design Values for Structural Members3. Design Provisions and Equations4. Sawn Lumber5. Structural Glued Laminated Timber6. Round Timber Poles and Piles7. Prefabricated Wood I-Joists8. Structural Composite Lumber9. Wood Structural Panels10. Cross-laminated Timber11. Mechanical Connections12. Dowel-Type Fasteners13. Split Ring and Shear Plate Connectors14. Timber Rivets15. Special Loading Conditions16. Fire Design of Wood Members


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NDS Ch 16 – Calculated Fire-Resistance Fire‐resistance of exposed wood members may be calculated for up to a 2HR fire‐resistance rating


Poll Question #77. In what chapter of the NDS will you find the fire design

of wood members?

a. 16

b. 14

c. 12

d. 9


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Q&AJames B. Smith, P.E.

Midwest Regional ManagerAmerican Wood Council

[email protected]


Conclusion This concludes the presentation on introduction to mass timber products. You should now be able to:

• Identify code acceptance of mass timber products

• Describe technology advances and standards related to mass timber products

• Recognize unique fire resistive characteristics of mass timber

• Describe application of NDS for up to 2‐hour FRR of exposed wood members


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Mass Timber Series• 8/13/2020 - Module 1 Introduction to Mass Timber

Products• 9/17/2020 - Module 2 What’s New in 2015/2018 IBC

for Mass Timber Construction?• Modules 3-6 Tall Mass Timber Construction per 2021 IBC

• 10/15/2020 - Module 3 Part 1: Background and Overview

• 11/12/2020 - Module 4 Part 2: Heights & Areas and Construction Fire Safety

• (No Date Set) Module 5 Part 3: Fire Safety• 12/10/2020 - Module 6 Part 4: Fire and Connection

Design and Special Inspection


Education Resourceswww.awc.org

Education Tab

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Education Resources• www.awc.org/education [email protected]

• In‐Person Seminars

• Monthly Webinars

• Recorded Presentations

• CEUs Available

Code Official Connections• www.awc.org/[email protected]

• Free to Qualified Officials

• Free Standard

• Pubs Discounts

• WoodPost Newsletter

• WoodWorks Software

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T h i s p r e s e n t a t i o n i s p r o t e c t e d b y U S a n d I n t e r n a t i o n a l C o p y r i g h t l a w s . R e p r o d u c t i o n , d i s t r i b u t i o n , d i s p l a y a n d u s e o f t h e p r e s e n t a t i o n w i t h o u t w r i t t e n p e r m i s s i o n o f A m e r i c a n W o o d C o u n c i l ( A W C ) i s p r o h i b i t e d . © A m e r i c a n W o o d C o u n c i l 2 0 2 0

in [email protected] | www.awc.org

This concludes the American Institute of Architects Continuing Education Systems Course

Mass Timber Series• Sep. 17 - Module 2 What’s New in

2015/2018 IBC for Mass Timber Construction?

• Oct. 15 - Module 3 Part 1: Background and Overview

• Nov. 12 - Module 4 Part 2: Heights & Areas and Construction Fire Safety

• Dec. 10 - Module 6 Part 4: Fire and Connection Design and Special Inspection


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Mass Timber Buildings

Thank you for participating!To schedule a seminar, contact:

The Learning Center™1‐888‐ICC‐SAFE (422‐7233) Ext. 33821

[email protected]

or

AWC Education

202‐463‐2766

[email protected]

and the IBC

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MASS TIMBER BUILDINGS...2020/08/13 · Round Timber Poles and Piles 7. Prefabricated Wood I-Joists...

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