I had posted this before.
The theory behind my design:
1. Conventional arched cold frame design have the headroom problem for plants near the edges. My design is uniform in height all around.
2. The problem with many cold frames is where do you store them when they are not in use. My design can be taken apart and reassembled in minutes. The parts are all modular and take very little room to store away.
3. Portable, light weight. Can be moved around. Each one is 4'W x 8'L x 2'H. Plenty of growing space.
4. Inexpensive. All plastic plumbing parts.
dcarch
