The workshop in Amsterdam will take place on Friday 21 March 2025.

The topic is: Trees along quay walls.

The programme and registration form can be found here: Program & Registration.

We regret to inform you that the SAG workshop in Amsterdam unfortunately cannot take place at the beginning of November as announced. The trees that are to be stressed to the point of failure by pulling tests were not permitted for felling by the administration at the scheduled time. As extensive measurements beforehand have already taken place, it is not possible to switch to other trees. The workshop must therefore be postponed and is expected to take place in March / April 2025. Further information will follow in time! We hope for your understanding.

We are currently working on offering an additional SAG workshop, either online or as a hybrid event. Topics of this event could be: Current research results, also from SAG-funded projects. In addition, the SAG working groups could be given space to exchange ideas and present the status of their work.

Review to the 22. SAG-Workshop in Bad Vöslau 

On 4th June 2024, the SAG-Baumstatik invited participants for the 22nd time to a workshop, this time on the topic of acoustic tomography. In Bad Vöslau, Austria, 77 participants from various countries met in person and online. The agenda included various specialist presentations as well as a practical session.

The event started with a presentation by Lothar Göcke, who has played a key role in the development of the equipment. Göcke gave the audience an insight into the physical basics of sonic tomography and the functionality of tomogram compilation. Finally, he gave an outlook on which innovations appear worthwhile: On the one hand, this is the use of camera technology and 3D simulators to determine the geometry of trunk cross-sections. Furthermore, current research is investigating how other properties of the sound waves can be recorded and interpreted. This could allow even more precise statements on the condition of trunk cross-sections in future.

In the palace gardens in Bad Vöslau, divided into groups, sonic tomographies were carried out with two different devices on three trees. Participants took the opportunity to literally look over the shoulders of colleagues and exchange practical experience as well as personal tricks of the trade.

In the afternoon, Sämi Prosenz (SV Prosenz & Novak GmbH, Austria) illustrated how sonic tomograms on the same level differ when different measuring positions are selected. Prosenz emphasised that the choice of measurement point position is crucial for a meaningful result. At the end of the workshop, various methods of assessing the safety against rupture of an analysed stem section using an acoustic tomogram were discussed in plenary.

Conclusion of the workshop: an acoustic tomogram is only of limited use without an expert, intensive visual inspection of the tree. Furthermore, an understanding of the underlying physical principles and the algorithms used to generate the images is important for the quality and evaluation of the tomogram. The inclusion of all ascertainable load components in the final safety assessment is also essential for a meaningful result.

SAVE THE DATE!

The 23 ^rd workshop will take place in Amsterdam on 7^th and 8^th November!

The workshop is about tree stability, quay wall stability and possible interactions: the case of Ulmus in Amsterdam. The two go back a long way (Unesco world heritage). In recent years trees are assumed to be a possible threat to the old quay wall constructions because quay walls have collapsed in several places. But is this the case? What can we learn from natural tree movements in wind, normal pulling tests and destructive pulling tests of trees along canals? For this workshop we try to combine sensor data on both trees and quay walls. The first day would be an introduction explaining the problem, visit the site and executing destructive pull test of 5 elms, followed by a day of the preliminary results including analyses of ‘natural movements’ of what could be recorded in strong winds in July-October on site, and presentations of related topics.

Final program and registration form will follow in September

The 22nd SAG Workshop on 4 June 2024 will be simultaneously translated between German and English via Zoom. The short presentations in the afternoon will be held partly in German and partly in English. Persons who require translation into the other language must join the Zoom meeting via a laptop or mobile phone (only with headphones if present in the lecture room) in order to use the language channels.

Please download the programme and registration form in English and register if you are interested. After registration, we will send you the access data for the Zoom meeting.

Please note again: Only those who subscribe to our newsletter list will continue to receive regular information about the SAG Baumstatik workshops! Please register!

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The 22nd SAG workshop will take place in Bad Vöslau near Vienna on 4 June 2024 and will deal with the topic of ‘Sonic tomography – comparative measurements’. The effect of different measuring points on the image produced will be compared and the creation of the images, their interpretation and the path from the image to the assessment of safety against fracture will be discussed.

Please download the programme and registration form in English and register if you are interested.

Note: The number of places is limited and priority will be given to members of the SAG Tree Statics and the ‘Tomography’ working group.

Please subscribe to our newsletter list if you would like to receive regular information on the SAG tree statics workshops.

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on 29 November 2023 Hybrid event

In presence in Gauting and online as webinar.

Topic:

Trees in Climate Change

Current research results on the influence of the climate catastrophy on the condition, development and likelihood of failure of urban trees.

Program (time CET = UTC + 1/Berlin, order of presentations open)

After the lively discussion about root detection in the SAG WhatsApp group, we would like to invite you to a workshop on the topic.

Program

We look forward to seeing you. The board

In the course of the SAG Summer School 2022 in Trieste, a public conference will take place on Thursday, 21st of July 2022. There, lectures on some topics of the Summer School will be held. SAG members and the well-known experts invited to the Summer School will present important results of their research and practical work to a greater international public.

The full program: (PDF-Version: https://www.sag-baumstatik.org/wp-content/uploads/220705-Programme-of-the-lecture-day_Thursday.pdf )

Language of the conference: English – Italian (simultaneous translation from English) Admission: € 100,- per person

Venue: MIB Trieste School of Management Largo Caduti di Nassiriya 1, Trieste

Programme
08:30 opening

SECTION 1: Research
09.00 – 9.15 welcome, introduction
09.15 – 10.00 Prof. Dr. Francesco Ferrini, University of Florence: Urban forestry
10.00 – 10.45 Prof. Dr. Steffen Rust, HAWK Göttingen, Germany: Recent results from research on the pulling test method
10.45 – 11.00 Questions & Answers
11.00 – 11.30 Coffee break and networking
11.30 – 12.15 Prof. Dr. Karl Niklas, Cornell University: What we still do not know about Tree Biomechanics
12.15 – 12.30 Questions & Answers
12.30 – 14.00 Break – Lunchtime

SECTION 2: Applications
14.00 – 14.30 Philip van Wassenaer, consultant at Urban Forest Innovations, member of SAG: Tomography on Redwoods in the Western USA
14.30 – 15.00 Andreas Wüstenhagen, board member of SAG Baumstatik & consultant: Supporting habitat trees with Carbon exoskeletons
15.00 – 15.30 Andreas Detter, Chairman of SAG Baumstatik, consultant at TreeConsult, Brudi and Partner: Lessons learnt from pulling tests for visual tree assessment
15.30 – 16.00 Coffee break and networking
16.00 – 16.30 Case studies from SAG members (names to be confirmed)
16.30 – 17.00 Paul Muir, consultant at Treework Environmental Practice, UK, member of SAG: The new SAG Pulling Test Standards
17.00 – 17.30 Questions & Answers, closure and goodbye

Registration possible only via email at

From July 17th to 22nd, SAG is holding a workshop on the subject of pulling tests.
Experts and users want to gather and expand their experiences in small groups in an idyllic environment and also discuss them critically, e.g. new results from science and research on the subjects

– Tree morphology
– case studies of pulling special trees
– Material properties of different trees
– Wind and tree interaction
– and much more.

During the week renowned scientists will join us, such as Karl Niklas, Steffen Rust, Francesco Ferrini and many others in an informal and friendly atmosphere.