Another Beam Question

I posted this in the Renovate forums but will also post here as the responses are likely to be quicker.



I want to remove a post and then Span up to 5metres maximum with either LVL or U beam so that

I have a larger unencumbered space under the deck and part of the house.



The posts, and therefore the beam, will be under the outside wall of the house, which I don't think is load bearing because:

*It was built on the outside of the original verandah of the house. ie. the verandah has been built in.

*The posts are90mm hardwood anchored to gal. stirrups that are set in concrete. There is about 75mm of air space between

the bottom of the post and the concrete footing.

* I have looked at the trusses and it appears they are designed to place the load of the roof on the ORIGINAL outside wall of the house



The original roof covers the verandah and is a single span from the centre of the house.



My plan is to sink two new posts beside the two post already in place, tie these to the existing posts and tie the existing hardwood beam to the new beam. The middle post would then be removed.



How big a beam will I need and will my plan work??



Many thanks, artme.