Back in my box.

Joe - My apologies. You are right - did not fully read your post. At a
glance I saw steel I beam. I immediately thought back to my days as a
crane repair guy and pictures of steel girders came to mind - overkill
yes.

I will bow to all of you and heed the advice. Anyone want to buy a
lengths of 2X4 I have lying around now?

I guess I bought first, asked questions later.

I will try find a local supplier for the box steel. If not, an extra
support would be called for.

Thanks for you help though folks - much appreciated.

Cheers,
Crispin