cold frame pitch
I would like to build a cold frame out of pvc that will open and close manually. I found some plans on pvcplan.com. I'm not a carpenter. I have been able to adjust the plans to my 4x4 sqf bed , except I can't figure out how to make a ptich whereas the two sides come to the middle equally. See plan below. can anyone share with me how to figure out the proper height, width and length. I want it to be 2ft high in the middle.