OKay threw all the parts together to show the guys at work what it will look like when sort of finished. Just a couple of little problems to solve like distance between the top of the pier head and the bottom of the pier head. With the bolts in the picture spacing is about 80mm. Whats a good distance?
I need to get some threaded rod I think for this as the bolts I have at work are either too big or too small or dont have enough thread.. The lower bit of the pier head is actually two pieces of 10mm plate welded together, making it 20mm thick! Not my idea the guy doing it thought it would look nicer. Hey I have no complaints if it's stronger. Weighs a ton already

The whole thing will be treated with anti-rust stuff before a base paint being applied then the realpaint, either that or I get te while thing powder coated? Except for the aluminium which I will get anodised later..
Anyway thoughts on spacings greatly appreciated.