Category Archives: Services

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Finite Element Analysis at Greenwood Engineering


Above screen grab shows Finite Element Analysis model under 30 Kips vertical load and 4 Kips lateral load (theoretical wind drag about 1 Kip).

The model uses 2×2 by 0.188 wall ASTM A500 Gr. B rectangle tube formed into the shape, with ten equal ribs.  Rolled channel section collect the loads at the bottom and the middle.

One interesting part is the skin (below the floor plane) which is modeled as a fiberglass layup with horizontal stiffeners every 3’ vertically (approx.).  They would lap around and fasten to the the rib tubes, making a very efficient assembly.

This is very preliminary, but the model has 47,000 nodes and is one of the largest computer models of this type that I’ve constructed and operated.

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Retain Services with Greenwood Engineering

Please contact us to discuss your dream…

+1 541.592.4100
P.O. Box 1571

Cave Junction, OR 97523 / Greenwood Engineering ©1991/2016

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

Greetings and welcome to the refresh of

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.

Thanks and enjoy the new site.

Over 30 years of treehouse specific engineering analysis and design.

November 2017
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