My wonderful and talented late husband built a "tomato room" using copper piping and it included a "door" for entrance/exit. Bird mesh went over the entire top and sides to keep the birds out.
In the winter of 2012-2013 we had a major snowstorm and the weight of the snow on the mesh bent the piping at the top. That was the end of that garden but the pipes are still used for dahlia stakes.
