Truss design for garage renovation

I'm looking for a mechanical structural engineer to design a support for a double garage. The current garage has two openings separated by a pillar. I want to make it into one opening, but think the bricks above may be too high a weight in the centre for a simple lintel. Thinking I need a curved beam to each wall, a tie rod to take the horizontal stress off the walls and a central link to the lintel to eliminate any bending. See current versus desired pic attached.

Note that I have done some initial work on a steel lintel (using Inventor), as attached. This was for a 6 metre T lintel, 250 x 200 x 10 galvanised steel. I'm looking for both confirmation of that, but also what other, lighter, options might be feasible, I realise that it could be best to change the bricks for a wooden frontage, and have considered slicing the bricks and making a fascia by sticking them on a wood panel, which would lower the weight significantly. So this option should also be considered. I can send other sizes too, but the pics should be sufficient to give you an idea of loads. The garage is brick construction, and the corners are dual brick pillars.

Skiciranje osnutkov Tehnično risanje Strojni inženiring Solidworks Statika

ID projekta: #13976967

Več o projektu

Lokacija: Camp Hill, Australia