Make garden arches of rebar?
I have this idea to make a series of arches along my back rock wall, which is 5' high. I was thinking of a rustic look with rebar, with lights added. I want the tops of the arches to be above the wall so they can be seen from the outside of the all.
Do you think a length of rebar is long enough to make a gentle arch about 6' high at the top? I don't know what lengths it comes in, and I've forgotten everything I maybe knew about geometry, so I can't model it.