Connections for Mass Timber Construction and New Fastening Details - - PowerPoint PPT Presentation

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Connections for Mass Timber Construction and New Fastening Details - - PowerPoint PPT Presentation

Feb 14, 2024 718 likes •1.1k views

Connections for Mass Timber Construction and New Fastening Details Mark Gillis, P.Eng. Gillis & Company Timber Frames Wood Connections Timber Engineers and Builders Timber Connections Outline: Wood Behaviour & Characteristics

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Wood Connections Timber Engineers and Builders

Connections for Mass Timber Construction and New Fastening Details

Mark Gillis, P.Eng. Gillis & Company Timber Frames

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Wood Connections Timber Engineers and Builders

Timber Connections

Outline:

Wood Behaviour & Characteristics Connection Design Fasteners Connection Detailing

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Wood Connections Timber Engineers and Builders

Wood Behaviour & Characteristics

Compression Parallel and Perpendicular

  • Hankinson Formula
  • Bearing
  • Side Grain
  • End Grain

Tension Parallel and Perp Shear

  • Net Area
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Wood Connections Timber Engineers and Builders

Wood Behaviour & Characteristics

Design for Ductility

  • Wood = Brittle Failure = Bad!
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Wood Connections Timber Engineers and Builders

Connection Design

CSA O86.1 (2009)

Standard for Engineering Design in Wood

Wood Design Manual (2010)

Canadian Wood Council

  • CSA O86.1 (2009)
  • National Building Code (2010)
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Wood Connections Timber Engineers and Builders

Connection Design

Critical Items:

  • Species
  • Grade
  • Moisture Content
  • Angle to Grain
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SLIDE 7

Wood Connections

Connection Design

Wood Species

CSA O86.1 Species Groups:

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Wood Connections

Connection Design

Wood Grades

CSA O86.1 Grade Categories:

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Wood Connections Timber Engineers and Builders

Connection Design

Moisture Content – Very Important!

Green Wood (Moisture Content > 20%)

  • Locally Available
  • Quick Turn-Around Time
  • Drying Issues:
  • Shrinkage – Net Section Reduction
  • Bowing, Cupping, Twisting
  • Checking
  • Soft (Structurally)

Wet Service (low drying capacity)

  • Detailing to avoid trapping water
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SLIDE 10

Wood Connections Timber Engineers and Builders

Connection Design

Moisture Content – Very Important!

“Dry” Wood (Moisture Content < 20%)

  • Probably NOT Locally Available for Larger Sizes
  • MUCH Longer Turn-Around Time
  • No Major Drying Issues
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SLIDE 11

Wood Connections Timber Engineers and Builders

Connection Design

Angle to Grain – Also Very Important!

Compression Parallel and Perpendicular

  • Hankinson Formula

Tension Parallel and Perpendicular

  • Hanging Loads
  • Detailing
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SLIDE 12

Wood Connections Timber Engineers and Builders

Fasteners

CSA O86.1 – Section 10

  • Nails & Spikes
  • Wood Screws
  • Bolts (Threaded Rod)
  • Lag Screws
  • Split Rings & Shear Plates
  • Timber Rivets

Proprietary Fasteners

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SLIDE 13

Wood Connections Timber Engineers and Builders

Fasteners

Nails & Spikes

Image Courtesy of www.leaderhome.com

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SLIDE 14

Wood Connections Timber Engineers and Builders

Fasteners

Spikes

Wood Decking - 2x6, 3x6 (Solid Sawn or Laminated) CSA O86.1:

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SLIDE 15

Wood Connections Timber Engineers and Builders

Fasteners

Wood Screws

Image Courtesy of www.driverlayer.com

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Wood Connections Timber Engineers and Builders

Fasteners

Bolts/Threaded Rod

  • Side vs. Internal Plates
  • Finishes/Quality
  • Malleable Iron Washers
  • Hanging Loads
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SLIDE 17

Wood Connections Timber Engineers and Builders

Fasteners

Bolts/Threaded Rod

  • Joint Configurations
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SLIDE 18

Wood Connections Timber Engineers and Builders

Fasteners

Lag Screws

Image courtesy Portland Bolt

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SLIDE 19

Wood Connections Timber Engineers and Builders

Fasteners

Split Rings & Shear Plates

Image courtesy CWC

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Wood Connections Timber Engineers and Builders

Fasteners

Timber Rivets

Image courtesy Specialized Timber Fasteners

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SLIDE 21

Wood Connections Timber Engineers and Builders

Fasteners

Proprietary Fasteners

  • Timber Screws

Images courtesy GRK Fasteners

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Wood Connections Timber Engineers and Builders

Fasteners

Proprietary Fasteners

  • Timber Screws
  • Timberlinx

Image courtesy Timberlinx

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SLIDE 23

Wood Connections Timber Engineers and Builders

Fasteners

Proprietary Fasteners

  • Timber Screws
  • Timberlinx
  • System WS

Images courtesy SFS Intec

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Wood Connections Timber Engineers and Builders

Fasteners

Wood Joinery

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Wood Connections Timber Engineers and Builders

Wood Joinery

TFEC-1 - Standard for Design of Timber Frame Structures and Commentary TFEC Master Spec for Timber Frame Construction Section 06130 timberframeengineeringcouncil.org

Fasteners

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Wood Connections Timber Engineers and Builders

Connection Detailing

Connection Details

  • CSA Details

(Wood Design Manual)

  • Column Bases
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Wood Connections Timber Engineers and Builders

Connection Detailing

Connection Details

  • CSA Details

(Wood Design Manual)

  • Column Bases
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SLIDE 28

Wood Connections Timber Engineers and Builders

Connection Detailing

Connection Details

  • CSA Details

(Wood Design Manual)

  • Beam-Column
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SLIDE 29

Wood Connections Timber Engineers and Builders

Connection Detailing

Connection Details

  • CSA Details

(Wood Design Manual)

  • Drying Effects
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Wood Connections Timber Engineers and Builders

Connection Detailing

Connection Details

  • CSA Details

(Wood Design Manual)

  • Tension Perpendicular
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SLIDE 31

Wood Connections Timber Engineers and Builders

Connection Detailing

Connection Details

  • CSA Details

(Wood Design Manual)

  • End and Edge Distance
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SLIDE 32

Wood Connections Timber Engineers and Builders

Summary

Wood Behaviour & Characteristics

Compression Parallel and Perpendicular

  • Hankinson Formula
  • Bearing
  • Side Grain
  • End Grain

Tension Parallel and Perp Shear

  • Net Area
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SLIDE 33

Wood Connections Timber Engineers and Builders

Summary

Connection Design (O86.1)

Species Grade Moisture Content Angle to Grain

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Wood Connections Timber Engineers and Builders

Summary

Fastenings

  • Tons of Options

Connection Detailing

  • Wood Design Manual
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Wood Connections Timber Engineers and Builders

Contact Me

Mark Gillis, P.Eng.

Gillis & Company Timber Frames

6240 Summit Street Halifax, Nova Scotia, B3L 1R7 www.gillistimberframes.com mark@gillistimberframes.com (902) 453-2108

  • Design/Build
  • Consulting/Engineering
  • Cost Estimating
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Wood Connections Timber Engineers and Builders

Questions?