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Part 2: WDM Glulam Column – An Example

Introduction

This example compares a glulam column example from the Wood Design Manual (2017) with results from the Sizer Program. It evaluates a 7-meter spruce glulam column under specified dead and snow loads, considering slenderness ratios and bracing conditions.

The program is used to replicate the example, input load conditions, and verify that the column’s axial capacity matches the manual’s calculations. The results confirm that Sizer provides a more detailed analysis than manual selection tables, particularly for slenderness and compression strength calculations.

Learning Outcomes

By the end of this lesson, you will be able to:

  • Compare the design process of a glulam column using the Wood Design Manual and the Sizer Program.
  • Analyze how slenderness ratios and bracing conditions impact the structural capacity of a glulam column.
  • Demonstrate how to input load conditions and lateral bracing in Sizer to replicate the manual’s calculations.
  • Evaluate the benefits of using Sizer for a more detailed analysis beyond selection tables, particularly for slenderness and compression strength calculations.

Instructional Video (Part 2 of 2)

Video Run Time: 5:01 minutes

This video utilizes one project file and it is available for download below.

CLT Design

Introduction

This lesson features panel design, focusing on CLT (Cross-Laminated Timber) and demonstrating both structural and fire design aspects. It covers the inclusion of CLT panels for designing beams and walls, with a specific focus on wall panels. The lesson details species and grade options, load specifications, and how Sizer generates recommendations for wall panel sections. Additionally, it discusses fire resistance calculations, highlighting the method used to determine the appropriate cross section to resist loads after one hour of fire exposure, and recommends a section depth for fire resistance.

Learning Outcomes

By the end of this lesson, you will be able to:

  • Describe the key features of Sizer panel design, including its ability to design CLT panels for structural and fire resistance applications.
  • Explain how material selection (SPF, Douglas Fir, or Northern) and load inputs (dead, live, and wind) influence the recommended panel section.
  • Analyze how fire resistance requirements impact panel design, specifically how the program adjusts panel depth to compensate for wood charring and structural reduction per CSA-086 standards.
  • Apply the knowledge of Sizer’s automatic recommendations to select appropriate CLT panel dimensions based on load conditions and fire resistance criteria.

Instructional Video

Video Run Time: 02:28 minutes

Lesson 3 Assessment

Difficulty Level: 1/5

Estimated Time to Complete: 15 minutes


Problem Statement: Joist Bearing Length Design

The goal of this assignment is to determine the minimum bearing length required for single-span floor joists based on the given structural loading conditions and material properties. 

Given Data:

  • Joist Type &  [Grade]: S-P-F  sawn lumber [No.1/No.2] 
  • Joist Size: 38 × 184 mm 
  • Joist Span: 3.0 m 
  • Joist Spacing: 400 mm (center-to-center) 
  • Specified Dead Load: 1.5 kPa (includes partitions) 
  • Specified Live Load: 2.4 kPa (commercial use and occupancy) 
  • Load Duration: Standard 
  • Service Condition: Dry 
  • Lateral Support: Fully supported by 15.5 mm Douglas fir plywood (DFP) subfloor, field-glued to joists 
  • Floor System Type: Case 2 

Design Requirement:

Use the software to determine the minimum bearing length required at the supports, considering the compression perpendicular to grain capacity of S-P-F No.1/No.2 lumber to ensure structural adequacy under the applied loads. 


Question 1

Select the most appropriate answer based on the software output and standard design requirements.

What is the correct minimum bearing length required? *

Reassessment of Design Values for Hem-Fir (N) Dimension Lumber (Canadian Market)

The design values for visually graded and mechanically graded Hem-Fir (N) dimension lumber have been updated in response to the routine assessment of strength and stiffness to ensure reliable performance in structural applications.

These updates take effect on April 1, 2025, and are published in the NLGA Standard Grading Rules for Canadian Lumber, CSA O86 – Engineering Design in Wood, and the National Design Specification® (NDS®) Supplement for Wood Construction, developed by the American Wood Council (AWC). Within the NDS® Supplement, these updates specifically apply to Tables 4A and 4C, with additional impacts on Table 4G.

The following Frequently Asked Questions provide detailed information about the updated design values, their implementation, and practical implications. This content is provided as general information only and is not intended to be relied upon for design decisions. For actual use and design implications, users of Hem-Fir (N) should consult the applicable design guides or specifications (e.g., CSA O86 – Engineering design in wood or the National Design Specifications® (NDS).

Lateral Bracing Requirements – Part 9 of the BC Building Code 2024

Purpose:
This publication provides detailed guidance on the BC Building Code 2024 requirements for lateral bracing in Part 9 wood-frame houses. It explains the building material requirements and construction methods necessary to ensure houses are safe and resilient against seismic and wind loads.

Impact:
This illustrated guide aims to help designers and builders in British Columbia understand and implement the updated Code requirements for lateral bracing. By doing so, it enhances the structural integrity of houses, ensuring they are better protected against environmental hazards, especially earthquakes.

Partners:
Canadian Wood Council, National Research Council, The Province of B.C., University of Ottawa

Sizer Course

Sizer Course

Course Overview

The Sizer Course provides an in-depth introduction to the WoodWorks Sizer Program, a powerful tool for designing and analyzing structural elements such as beams, columns, and shearwalls. The course covers key features, including bearing design, cross-laminated timber (CLT) analysis, load input, lateral support considerations, and Concept Mode for preliminary structural modeling.

You will explore how the program optimizes designs by automatically generating load patterns, checking compliance with building codes, and refining structural elements for improved performance.

Course Learning Outcomes

By the end of this course, you will be able to:

  • Design and analyze structural elements using the WoodWorks Sizer Program, including beams, columns, and CLT panels, while considering material selection, loading conditions, and code compliance.
  • Evaluate load distribution and structural stability by applying Sizer’s automated features for pattern loading, lateral support analysis, and fire resistance adjustments.
  • Optimize structural designs through Concept Mode and detailed element analysis, ensuring efficient material use, proper load transfer, and adherence to engineering best practices.

Course Structure

This course consists of six (6) lessons. Each lesson is comprised of a lesson overview, learning outcomes, instructional videos, assessment questions and an assignment. Through these elements, you will gain practical experience in using the Sizer Woodworks Program for real-world applications.

Once you have completed all assessment questions and assignment submissions, a certificate of completion will be digitally awarded.

Time for Completion

This course is comprised of ten videos for a total run time of 67 minutes.

To complete the assessments in this course you can expect to spend ~ 100 minutes.

Program Download

In order to complete this course you will need to download a trial version of the Sizer Program.

Complete these steps to download the program:

  1. Navigate to the program download page by clicking here.
  2. Click on the “Download Now” button for the Sizer Program.
  3. Locate and click on the download either in your browser or on your computer.
  4. Follow the prompts provided by your computer to complete installation.

*Note: the trial version of the program is only valid for 10 days upon installation.

Insuring Timber Buildings: Best Practices for the Best Rates!

Course Overview

Recent code changes and advancements in timber products are allowing for larger and more complex buildings to be built in timber. These multi storey, complex buildings are comparable to steel and concrete in strength and durability and conform to all building codes. Although a relatively small portion of the overall project budget, the course of construction insurance for these projects tend to be much higher than the non-combustible alternative. This presentation will walk the attendee through the nuances of the insurance industry, and highlight the research that has taken place over the last 3 years to lower these rates. We will debunk many of the myths associated with timber construction that serve as roadblocks to desirable insurance rates. The best practices we will examine in this presentation could be instrumental in helping achieve a safe and insurable construction site.

Learning Objectives

  1. Understand the insurance industry’s methods of assessing construction risk.
  2. Identify the major risk factors associated with timber construction.
  3. Identify construction site best practices.
  4. Be prepared to submit a comprehensive package to apply for insurance.

Course Video

Speaker Bio

Timothy Buhler, BBA
Technical Manager
Canadian Wood Council

Born and raised in Northern Ontario, Tim is very aware of the importance of the forestry industry to Canadians.

Tim graduated from Nipissing University in 2006 and shortly after joined the Canadian Wood Council. Tim’s keen interest in sustainable construction and curbing climate change led him to pursue the role of technical manager within the Wood WORKS! Program. Over the last 14 years Tim’s experience and education has taken him across North America and Europe where he has engaged and learned from a variety of leading experts in the field. Tim has worked closely with industry and the design community to become a resource for all things related to timber construction.

As a technical manager with the Ontario team Tim continues to work diligently to promote timber construction has assisted with over 100 projects in Ontario ranging in size in scope from 1 to 35 (theoretical) stories.

CLT Design Considerations

Course Overview

Mass Timber has arrived in the world capital infrastructure marketplace while architects and structural engineers are trying to get educated about how to design with this new advanced engineered wood material. This paper discusses three important aspects of mass timber design in outdoor and indoor (wet and dry service) conditions as well as important design questions such as major and minor axis horizontal shear as it relates to column and wheel point loads. Other design considerations will be discussed as well.

Learning Objectives

  1. Mass timber design details for outdoor and indoor environmental exposure. 
  2. Point loads due to column loading in mass timber systems both post and beam and CLT and simple platform and column.
  3. Fire resistance ratings and advanced materials in mass timber buildings
  4. Minor and major axis shear characteristics of CLT and impacts on design considerations for civil infrastructure.

Course Video

Speaker Bio

Dan Tingley, Ph.D., P.Eng., MIEust, CPEng., RPEQ,
Senior Wood Technologist / Structural Engineer
Wood Research and Development (WRD) Oregon, USA and Caboolture, QLD, Australia

Dr. Dan Tingley graduated from University of New Brunswick with a B. Sc. F.E. and later a M.Sc.C.E. Following this in the 90’s Tingley finished his Ph.D. in wood technology and structural engineering at Oregon State University. He has worked in the wood products field for 40 years. He currently serves as senior engineer for Wood Research and Development and Advanced Research and Development and makes his base in Portland Oregon. He has won the Civil Engineering Research Foundation’s Charles Pankow Award for Structural Innovation as well as the Nova Award for all construction products issued by Construction Innovation Forum for his pioneer work in high strength fiber reinforcement of wood and wood composites. Tingley holds over 40 patents worldwide and has over 125 referred and non referred publications. He specializes in timber structures design and restoration with a significant interest in timber bridges. He is currently acting as senior engineer providing oversight on 20 timber bridge restoration projects world-wide.

Encapsulated Mass Timber: A New Construction Type for the 2020 NBC

Course Overview

This webinar will discuss the fire-related national building and fire code changes related to a new construction type called Encapsulated Mass Timber Construction (EMTC) to be used for wood buildings up to twelve storeys. As well, it will provide an overview of ongoing fire research at the National Research Council of Canada into various performance aspects of mass timber construction and tall wood buildings.

Learning Objectives

  1. Proposed new construction type EMTC.
  2. Proposed new ULC encapsulation rating test.
  3. Proposed additions for EMTC in the 2020 NBC and NFC.
  4. Mass timber fire testing.

Course Video

Speaker Bio

Marc Alam
Manager, Codes and Standards in the fire division Canadian Wood Council

Marc Alam is a member of the Canadian Wood Council. As Manager, Codes and Standards in the fire division, Marc assists through participation in CWC’s building code and standards fire‐related initiatives and the development of CWC’s fire design tools, as well as code‐related fire research projects.

Mid Rise Structural Design

Course Overview

Examining recent 6-storey projects, this presentation will highlight specific challenges, important details and procedures, and to illustrate how various engineered wood products were applied strategically to ensure success.

Learning Objectives

  1. Gain insight into some of the critical structural challenges for wood framed mid‐rise buildings.
  2. Understand how use of Engineered Lumber (particularly LSL) can assist in decreasing building shrinkage and resisting higher loads.
  3. Know what a qualified ELP supplier can provide to assist in these projects.
  4. Examine a few emerging technologies that may impact this type of construction in the future.

Course Video

Speaker Bio

Steve McManus, P. Eng.
Weyerhaeuser

Fire Spread and Mitigation Measures in Combustible Mid-Rise Buildings

Course Overview

The presentation will address common modes of fire spread in mid‐rise buildings of combustible construction and the measures implemented into building codes to limit fire spread. The presentation will look at several case studies and quantify the impact of key mitigation measures that have been implemented into building codes following these fires.

Learning Objectives

  1. Knowledge of key fire spread modes and mechanisms in combustible mid‐rise buildings.
  2. Knowledge of key building code requirements to limit fire spread.
  3. The importance of fire stopping and blocking.
  4. Methods to limit fire spread.

Course Video

Speaker Bio

Keith Calder, P.Eng.
Jensen Hughes

Keith Calder, P.Eng., has almost 20 years’ experience in fire engineering, fire modelling, building and fire code consulting and fire investigation. He has developed a vast knowledge of the application of current and historical building codes and has provided analysis and advice on the development of several wood initiatives.

Durability by Design

Course Overview

Durability by design is all in the detail. It is the detail, an aspect of wood design which is sometimes overlooked, that determines the durability of a building’s exterior, especially when wood is exposed to the elements. Knowing what happens to the wood when exposed to moisture or the sun’s UV rays and applying that information, results in a design that stands the test of time. Bill Billups’ presentation will include illustrated examples of what happens when design principles of durability are ignored.

Learning Objectives

  1. The participant will look at four design elements of wood structures: Canopies, Eave Lines, Siding and Caps & Bases.
  2. Examples will show what does / does not work and through these examples the presenter will show how Durability by Design is in the details.
  3. The participant will learn where the water goes and how nature teaches us how to handle the sun.
  4. They will come away with a Durability check list they can apply to any design they are working on.

Course Video

Speaker Bio

Bill Billups, AScT
Technical Consultant
Wood WORKS! BC

Calgary – Workshop: Mid-Rise Wood Design Essentials for Structural Engineers
Edmonton – Workshop: Mid-Rise Wood Design Essentials for Structural Engineers
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WoodWorks at The Buildings Show 2026
Woodworks
Green Construction through Wood: Accelerating Mass Timber Adoption in Canada
Canadian Wood Council Announces Leadership Transition
Canadian Wood Council Announces New Board Chair
Canadian Wood Council Annual Report 2025
The Canadian Wood Council is pleased to share its 2025 Annual Report, highlighting a year of strong performance, strategic collaboration, and progress advancing wood construction in Canada.
WoodWorks at BUILDEX 2027
Mid-Rise Wood Construction in Ontario: Navigating 2024 Ontario Building Code Updates
Wood Design & Building Magazine, vol 25, issue 103
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