In article ,
Joe Barta wrote:
Mike Marlow wrote:

Serious overkill Murray. The 1/2 inch would weigh a ton and you
won't need the strength that it will bring.

I can't imagine 1/2" angle iron bringing much strength at all over 6
ft... and not that much weight either. Or maybe we're thinking
different things. I'm thinking about 1/8" thick steel angle with each
leg being 1/2" wide. Am I missing something??

Yeah. other folks thought you meant 1/2" _thick_ steel -- a continuous
piece running the length of the shelf.