Purchase XL SYSTEM hardware

THE XL SYSTEM ©- FINALLY, A TRUE TREE HOUSE MOUNTING SYSTEM

The best way is to email us a request. Thank you.

+1 541.592.4100

gnwdeng@gmail.com
P.O. Box 1571

Cave Junction, OR 97523

 

Tree Fasteners from Greenwood Engineering

The XL System is the most tree and load friendly support device available.

2016 XL with INTEGRAL EXTENSION, $300 COMPLETE!

XL Fasteners come in several configurations:

1. Large trees (>50 CM, or 20″ in DIAMETER, use the XL; it will support the most load and can be mounted as a cantilever to hold beams with > 5,000 Kg (5 tons +) in many types of trees. They can also be nested to achieve enormous load capacity.

2. Medium trees (30 to 50 Cm in diameter, 12″ to 20″) use the XL Thru; they support beams on each side of the tree to keep the loads down the center-line and can support > 3,500 Kg on each side. $450 up depending upon configuration.

3. Small trees (22 to 36 Cm in diameter, 9″ to 14″) use the XL Mini; they support nearly the same load as the XL Thru and cost the same, but are specifically tailored to work best in small trees.

4. Engineering/Design services are billed at $125 USD per hour.

The XL system provides for actual load testing prior to construction, periodic re-torque, and the least amount of tree tissue removal and cost for the load supported.
Good luck with your project!


Treehouseengineering.com / Greenwood Engineering ©1991/2016

Contact: +1 541.592.4100
email Charles Greenwood P.E.

Greetings and welcome to the refresh of Treehouseengineering.com

Charles S. Greenwood P.E., is the founder of the engineering movement with modern treehouse design. He personally welcomes you to the resources available here.

If you are interested in retaining professional engineering services use the contact page. You will be able to send an email directly.

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Over 30 years of treehouse specific engineering analysis and design.

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