Highlines in windy conditions
The ISA Safety Commission is looking to gather some data on highline behaviour in windy conditions. Please fill out the questions below as accurately as possible. If you have several lines in a single location or a single event, please fill out the form for each line. Don't worry if you can't fill out all the answers. Everything is helps!

Thank you!

French version:
https://docs.google.com/forms/d/e/1FAIpQLSf3oIEO4Z82IOqaJmH2c8uwvVVzBYWZfNAnijTQYYmUElpfXQ/viewform
Spanish version:
https://docs.google.com/forms/d/e/1FAIpQLSfSgzpDpHHVIaMeovpmWlIL4YAU_N7dNf9IrNii_dkwUKaMZw/viewform
General information
Your name
Your contact information (an email would be best)
Highline specifications
Please try to be exact when giving us the location information. At the end, you can add more info about the terrain itself (cliff, canyon, mountain ridge, etc.).
Country
Anchor location
We use a location service called what3words and it replaces traditional coordinates with a combination of 3 words to encode a specific location on the planet. This helps us to find the lines, because not all countries use the same coordinate system and it is more reliable and accurate than a google maps link.
Exact location of the first anchor in 3 words (see the link below)
Exact location of the second anchor in 3 words (see the link below)
Highline length (in m)
Connected main and backup?
Clear selection
If yes, how many and how long were the individual pieces? (in m)
Direct height (in m)
Please give us some information about the type of terrain. Was the line in a canyon, on a cliff, in a forest, etc?
Estimated highline tension (in kN)
Estimate if you don't know exactly
Highline webbing (main and backup)
Tapes
Please tell us about how the line was taped. Again, be as specific as possible.
Tape material?
Tape width (in mm)
How old were the tapes?
How far apart were the tapes (in m)?
Example: 4-6
Did the tapes slide on main or backup?
Clear selection
How big were the backup loops?
What was the "sag" of each loop? Was there one big loop that started the problem?
The incident
We are using the location and time of the incident to reconstruct the wind speeds and direction. That is why it is important to be as accurate as possible with the times. Please keep the answers in the indicated format.
Time of rigging (hours:minutes, dd/mm/yyyy)
Example: 15:30, 16/03/2016
Time of detaping (hours:minutes, dd/mm/yyyy)
Example: 23:10, 16/03/2016
If unknown, last time the line was seen intact (hours:minutes, dd/mm/yyyy)
Example: 23:10, 16/03/2016
And the time it was found destroyed / detaped (hours:minutes, dd/mm/yyyy)
Example: 23:10, 16/03/2016
If you witnessed the detaping, how long did it take until the line was uncontrollable / fully seperated main and backup?
Subjective wind speed
Tell us how strong the wind felt to you. Did you think it was too windy to slackline? Did the wind feel dangerous at the moment?
Recorded wind speed - steady (prediction or record) in km/h
If you looked up the weather data afterwards (or looked at the prediction before rigging), please let us know here.
Recorded wind speed - gusts (prediction or record) in km/h
If you looked up the weather data afterwards (or looked at the prediction before rigging), please let us know here.
Is there anything else you would like us to know about the wind or the weather in general?
There is one more question at the end for general information and how it happened. This is weather specific.
Description of damage to webbing / anchors
How was the line derigged? Cut, failed, normal derig?
Please email relevant pictures (of damage, location, rigging, slider tape style) to wind@slacklineinternational.org
Please include your name and the time of the incident in your email, so we can relate it to your answers.
Any other information?
Please add whatever you think might help us (:
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