Green roof shed

I would like to build a shed with a green roof about 8 feet wide and 6 feet deep.  I would like for it to look like a hobbit house.  I have thought about using a trampoline frame for the outside walls with support under as well as beams spanning the 6 foot depths.  I am not planning to put in soil that is too deep and am not opposed to using a lighter weight growing medium.  Given those parameters, what support do I need for the weight of the green roof?  The picture is just one I found on the web, and I would prefer for the green roof to extend over the top.  Of course, I would like to upcycle materials that I could find cheaply.

Green roofs are heavy.
I suggest you research for  "structural requirements of green roofs"

Hi Sherri;
Great idea!  It will look very cool.
I would go a bit heavier than trampoline frame though . You want this to be a long term shed, so overbuilding is a good plan.
Steel pipe comes to mind. A steel pipe filled with sand will bend into an arch nicely.
What is your plan for capping it?

 

weights involved with green roofs

DEsign aspects

whats needed to hold up a green roof