Home Improvement Questions? Ask a Handyman for Answers
Hello .. Rich here .. are you planning to build this shack out of wood studs and plywood panels ?
I think you can find a 2 foot 8 inch door at your local supply house
You will need to know what their construction is in the support of the corner to know how wide the front has to be
the door needs about 1 1/2 inches on each side for the rough in and frame .. so a 3 foot opening and probably a 4 inch minimum corner construction