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Wind Design for Modular Vegetated Roof Assemblies
NLSM is a CONTINUING EDUCATION PROVIDER

Proof of Attendance will be issued for:
*OAA Structured Learning Hours
*AIBC, AAA, ALBNL, AANB and NSAA Core Learning Units
*LACES PDH: CSLA, OALA, BCSLA, AALA, APALA

Vegetated or green roofs offer multiple benefits to urban areas. They manage stormwater, reduce energy demand, mitigate urban heat island, improve air quality and enhance biodiversity. The City of Toronto adopted the Green Roof Bylaw in 2010 and became the first city in North America to require green roofs on most new buildings, including high rise buildings and lakefront properties that experience high wind.

Wind flow around buildings creates both positive and negative pressure fluctuations across the roof, which affects both the roofing and the vegetated roofing systems. As part of the building envelope, it is important that that a vegetated roof is secured against these wind forces.

In this webinar, we will first take a look at CSA A123.24: Standard Test Method for the Wind Resistance of Modular Vegetated Roof Assembly and the 2 key test components to measure wind uplift and wind flow resistances. We will share case studies to demonstrate how vegetated roofing systems behave at different wind pressures and wind speeds with videos of the tests. Finally, we will illustrate how to use CSA A123.24 in the wind design process of vegetated roofing assemblies. REGISTRATION IS LIMITED.

Learning Objectives

1. Define modular vegetated roof assembly (MVRA)
2. Understand wind effects on roofing and vegetated systems
3. Recognize governing factors of wind resistance for MVRA
4. Test for wind uplift and resistance and wind flow resistance
5. Apply CSA A123.24 in wind design process for MVRA

PDF of webinar: https://www.nlsm.ca/wp-content/uploads/2022/03/NLSM-webinar-Wind-Resistance-of-MVRA.pdf

Nov 24, 2022 01:00 PM in Eastern Time (US and Canada)

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Speakers

Karen Liu, PhD
Green Roof Specialist @Next Level Stormwater Management
Dr. Karen Liu has been conducting green roof research since 2000. Before joining the private sector, Karen was a lead researcher of the green roof programs at the National Research Council and the British Columbia Institute of Technology. She led the research teams to instrument and monitor various green roofs in Ontario and British Columbia to evaluate their water balance and examine their potential in stormwater management. Karen was a key participant in the research consortium that developed the first national wind testing standard for vegetated roofing CSA A123.24. Additionally, Karen has vast practical experience having worked on hundreds of green roof projects across North America, Europe and Asia. Over her career, Karen authored and contributed to dozens of academic and technical articles. In 2015, she received the F. Ross Browne Award.
James Weldon
Technical Sales & Design Consultant @Next Level Stormwater Management
With a background in architecture and engineering, James has worked in the construction industry in a design role for the past 8 years. Prior to working for Next Level Stormwater Management he was an architectural representative for a pre-cast concrete manufacturer and a structural designer for an engineering firm in British Columbia. An increasing interest and passion for sustainable building practices led him to the green roof industry, joining Next Level in 2019. Since then he has been involved in many unique and exciting green roof projects across the country. James offers a detailed and creative approach to designing and implementing green roofs for both retrofits and new construction on projects Canada-wide and looks for meaningful collaboration to find the right solutions for the stormwater challenges that we face.