Loading Events

« Back to Class Schedule

  • This event has passed.
Register Now

Biomechanics and Risk Assessment: What You Need to Know

April 5, 2019 @ 9:00 am - 3:30 pm
Instructor: Julian Dunster and Frank Rinn CEUs: 4.5 ALMTU / 1.0 B-S, 1.75 B-P, 1.75 B-M

This workshop has reached capacity. Select REGISTER NOW to join our waitlist. We will be in touch if a spot becomes available.

This course will focus on how tree mechanics affects the likelihood of failure component in risk assessment. We will look at wood anatomy, wind loading, wood decay, biomechanics and methods of investigating internal wood conditions with sonic tomography and resistance drilling. The course will be of use to anyone conducting risk assessments.


Location: Rotary Field House at South Surrey Recreation Center Complex, 2197 148 St, Surrey, BC, V4A 9P5, Canada

  • 09:00 – 10:00 Introduction. Biomechanics part 1 – Frank Rinn
    • Why established tree-safety evaluation methods are wrong
    • Understanding tree architecture and bio-mechanical design.
    • Wind load, pruning, and cabling.
  • 10:00 – 10:30 Break
  • 10:30 – 12:00 Biomechanics part 2 – Frank Rinn
    • How wood anatomy affects any kind of technical tree-safety assessments.
    • Real check for resistance drilling, sonic tomography, and pulling tests.
    • Practical concept for instant tree-safety evaluation at the tree.
  • 12:00 – 13:00 Lunch
  • 13:00 – 14:00 Field demonstrations of sonic tomography, resistance drilling (weather permitting). May be indoors using sample logs if it is raining.
  • 14:00 – 14:30 Break
  • 14:30 – 15:30 Reviewing test results, and software applications to enhance risk assessment. Relating it back to Likelihood of failure. Wrap up.


Frank Rinn owns RINNTECH, a company that develops equipment for dendrochronology, tree and timber inspection. Frank invented and developed different methods, machines, and computer programs for various purposes in tree-ring analysis, dendrochronology, tree- and timber inspection, such as resistance drilling, sonic tree tomography & root-plate detection, wood surface density analysis. He was granted several national and international patents, for example on high resolution and high-precision resistance drilling and sonic tomography including the RESISTOGRAPH® and ARBOTOM®

For his inventions and developments, he received several research and innovation awards (1989, 1992, 1997, 1998, 2004, and 2012).

Besides managing RINNTECH Frank works as a court registered expert, inspecting trees and timber structures. He lectures all over the world and has published several dozen papers on various topics.

Since 2001, he served as voluntary Executive Director of ISA Germany. He was on the ISA Tree-Risk Panel of Experts and contributed to the corresponding BMP. From 2011 to 2013 he served on the ISA Board of Directors.

Julian Dunster is a Registered Consulting Arborist and an Honourary Life member of the International Society of Arboriculture and the PNW Chapter. He is the lead author of the TRAQ course manual and served on the ISA Tree-Risk Panel of Experts and contributed to the corresponding BMP. Julian designed and implemented the TRACE programme that lead to the development of the TRAQ credential. He teaches the TRAQ course and advanced risk assessment techniques in several parts of the world.

Refund Policy

  • Cancellations made at least 10 days prior to the event will be refunded at 100%.
  • Cancellations made within 5-9 days of the event will be refunded at 75%.
  • Cancellations made within 1-4 days of the event will be refunded at 50%.
  • Refunds will not be made available for no-shows.

Late Registration

  • Participants are expected to enroll prior to the registration deadline.
  • Participants can register at the door of the event only if space is available. Individuals will need to pack their own lunch.
  • Late registration is possible on a space available basis. You can contact our office at (800) 335-4391. There may, or may not be, room available for those who show up without registering ahead of time for the workshop. We encourage you to register for the workshop in advance.

Allied Professionals are members of allied organizations. See our list of qualifying organizations.


Rotary Field House at South Surrey Athletic Park
2197 148 St
Surrey, British Columbia V4A 9P5 Canada