Swiss Re AG · SIX:SREN
Swiss Re — Technical Presentation (October 2021)
17 slides from Swiss Re's technical presentation, Oct 5, 2021
Slide 1: Timber and construction: Trends, Opportunities and Risks
Timber and construction: Trends, Opportunities and Risks Pascal Schappes, Marc Schmassmann - October 5th 2021
Slide 2: Kapellbrücke / Kapellbridge: Built in 1360 in Luzern
Kapellbrücke/ Kapellbridge: Built in 1360 in Luzern 2
Slide 3: Mass Timber – What is it?
Mass Timber – What is it? • Mass timber belongs to the Engineered Wood Products family • Mass timber combines wood’s inherent strength with modern engineering • Manufactured by using adhesives to bind strands, particles, fibers, veneers or boards of wood to form a composite products • Types of mass
Slide 4: Mass Timber – Trends
Mass Timber – Trends Pascal Schappes - Marc Schmassmann | October 2021 4
Slide 5: Mass Timber – Trends
Mass Timber – Trends • Use in the past: – low-rise buildings – simple design • Current use: – low-rise and mid-rise buildings, usually not more than 8 stories – partly complex design and geometry • Anticipated future use: – high-rise buildings with more than 40 stories – extension and modification o
Slide 6: Mass Timber – Opportunities
Mass Timber – Opportunities • Sustainability / Green building • Attractive design due to hybrid construction allowing a “gradual” approach to new building technique. • Costs reduction due to shorter construction period and less labor on site • Weight reduction compared to concrete or steel • Seismic
Slide 7: Challenges – Fire and its consequences
Mass Timber – Challenges – Fire and its consequences • Mass Timber is considered fire resistant, not fire resistive. This means that it is still a combustible product that will burn until extinguished • Although fire resistant at the first glance, a kind of peeling effect was observed for laminated
Slide 8: Challenges – Other
Mass Timber – Challenges – Other • Mass timber manufacturing capacity will need to increase significantly to meet the increasing demand • A new wave of companies is expected to enter the Mass Timber market with potentially lack of experience • Logistics: With just-in-time delivery of mass timber mat
Slide 9: What can go wrong? Siemens Arena
Mass Timber – What can go wrong? • Siemens Arena in DK, built in 2001 – Sudden collapse of two trusses a few months after inauguration – Root cause: 3 critical design errors Source: ©Peter M. Thorup Pascal Schappes - Marc Schmassmann | October 2021 9
Slide 10: What can go wrong? Oregon State University
Mass Timber – What can go wrong? • Oregon State University building, 2018 – Failure of cross laminated timber panel during construction phase – 1,000-pound section of the third floor buckled and crashed onto the floor below – Root cause: delamination due to temperature changes during glue applicatio
Slide 11: What can go wrong? Bad Reichenhall gym
Mass Timber – What can go wrong? • Multi-use gym Bad Reichenhall, DE, 2006 – sudden roof collapse, 15 fatalities, 34 injured – Root cause: – delamination due to humidity (wrong glue) – mistakes in structural roof design – insufficient maintenance (35 years old) – high but expectable snow load – Lead
Slide 12: Main Failure Causes
Mass Timber – Main Failure Causes Failure Cause Type of Buildings 5% 11% 11% 4% public material 8% industrial design agricultural building process 27% 7% apartment overloading 51% unknown/other other 53% 23% Source: University of Lund Pascal Schappes - Marc Schmassmann | October 2021 12
Slide 13: Age of Failures
Mass Timber – Age of Failures Source: University of Lund Pascal Schappes - Marc Schmassmann | October 2021 13
Slide 14: Conclusions
Mass Timber – Conclusions Although timber has been an indispensable building material for thousands of years now, new ways of workability can still be explored today. Chances and challenges must be observed closely to ensure a future- oriented, attractive but also safe use of this sustainable and ve
Slide 15: Thank you!
Thank you! Contact us Follow us Pascal Schappes Marc Schmassmann Senior Risk Engineer Senior Risk Engineer pascal_schappes@swissre.com marc_schmassmann@swissre.com +49 89 3844 1599 +41 43 285 27 24 15
Slide 16: Pascal Schappes - Marc Schmassmann | October 2021
Pascal Schappes - Marc Schmassmann | October 2021 16
Slide 17: Legal notice
Legal notice ©2021 Swiss Re. All rights reserved. You may use this presentation for private or internal purposes but note that any copyright or other proprietary notices must not be removed. You are not permitted to create any modifications or derivative works of this presentation, or to use it for