Did you build this? Or is that a kit.. that’s perfectly what I want. Can you share schematics?
The experiment was a success! All of my trees came out strong this spring.
I purchased a 15’ L x 8’ W x 8.5’ H "economy" cold frame kit from Grower’s supply. Base price for materials was under $500, but I added numerous options that include the extra poly and some hardware to close off the end walls and extra hardware for roll-up sides (a must, in my opinion).
Total price was about $750, which includes the lumber, screws, bolts, door hinges, staples, batten tape, etc. that I sourced from my local Lowe’s or from Growers Supply.
https://www.growerssupply.com/farm/supplies/ProductDisplay?mfPartNumber=103083
The link shows a 24’ L model, but you really should just call them you can specify the overall dimensions that you require and they’ll put a quote together for you. Smaller units will have rafters that come spaced as 5’ sections. I have 4 rafters total, 2 end wall rafters and 2 inner rafters (= 15’ L).
Mine is simply sitting on a concrete patio slab, so the rafters curve along the radius and then end blindly at the base, slipped into heavier gauge pipe that serves as an anchor. The kit comes with anchors that are designed to be pounded into the earth, but I just cut off the ends of the anchors and secured anchor posts to my baseboards (baseboards are just lengths of composite decking material).
Baseboards were then secured to patio using four 90 degree “L” brackets and four concrete anchor screws, secured it at the four corners. I was worried wind would lift the hoop house and shear the anchors away, but it held up through several punishing storms.
The end walls (and door) were made using 2” x 2” pine. Very simple.
Best part is I can disassemble and store it away this summer… just need to remove top poly film (which can be re-installed in the fall) and then each set of rafters will unbolt from the baseboard. The 2 x 2 pine supports, door and poly can remain on the end walls, as the poly is stapled down with the batten tape (better to leave is all in place rather than destroy the poly trying to remove it from the end walls).
I am happy to snap some pictures of details that they might be helpful.
I will say that because mine is on a patio that is also under a deck, it was protected from heavy snow… heavy snow could be a problem for these lighter-duty units. You would do well to be vigilant about pushing snow off the top, if yours were set up out in the open.
Noah