I would like to replace some existing decking in a sloped garden (max height circa 1m, total area circa 20m2) and considering to do part of it in galvanised steel, as I perceive this will last longer and require less maintenance than timber. My first thought was to cast the steel decking posts into the concrete footing, but from my initial research I don’t find any evidence of others doing it this way and I see the posts mostly bolted to the footing or some sort of anchor (L/J bolt) cast into the concrete, then the posts attached to the anchor. Is there a reason why I should avoid to cast the post in the concrete? My assumption is this would be stiffer/stronger than bolting to the concrete, only downside I foresee is if I ever wanted to replace the post it would be virtually impossible without also replacing the footing (maybe I just answered my own question).
Carrying on the theme of opting for steel over timber, again any good reason why you would advise against using steel for the beams and possibly joists?
Many thanks in anticipation of any tips you can share with me.
