http://www.rainyside.com/resources/hoophouse.html

I am not sure if this is exactly what you want. But I have seen elaborate designs similar to the one on the above website built to store/work on sailboats over the winter. Some are completed with plywood ends, door, etc...

hope the link is helpful.

: I need to build a temporary structure to move the shop into. I have seen
: pictures of sheds built with curved ribs covered with plastic in the boat
: building magazines. The ribs appear to be 1X2s seperated by short pieces
: and assembled on a form. I am looking for details or the name of the
: technique.