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    Climbers' CornerTree Academy
    MondayTuesdayWednesday

    Throwline Installation: A Survey of Techniques

    Summary

    This presentation will look at and discuss techniques used for installing throwlines in trees. The techniques discussed will include: Double Throwline, Double Ended, Bottle or double throwball saw, Walk Down or Walk Up, Strum, Flipstick, Sending a Loop, or the Mid-line Knot.
     
    Three arborists from Minnesota have recorded data on throwline installation techniques of approximately 200 trees in production settings. The data recorded includes: Height, Placement (upper, middle, lower third of total tree height), Time, Tree Species, Tie-in (DdRT, SRT), and Special Techniques.  The recorded data has shown an average of just over three minutes to set the throwlines an average of 42 feet.  The most common techniques in the survey were the double throwline technique (26%), the double ended (14%), and midline knot (12%). The survey found 10% of throw-ins to be bullseyes.  The fastest throw was 0:18, and slowest 20:44.
     

    Conference Proceedings Documents

    Presenters

    Pierce Wasmund is an ISA Certified Arborist and Certified Tree Worker Climber Specialist. He is a graduate of the University of Minnesota Urban Forestry program. Pierce is a production Arborist for Northern Arborists in Lake Elmo, Minnesota. 


    Taylor Hamel is a contract climber and the owner of Taylor Hamel Arborist Services. He is an ISA Certified Arborist and two-time Minnesota tree climbing champion. Taylor has traveled around the United States and Europe working with and climbing trees. 

    Climbers' CornerTree Academy
    MondayTuesdayWednesday

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