Help with steel pipe truss design

I want to prepare a basic design for steel trusses using drill pipe (70mm OD; 5mm wall thickness) - i have some ideas on what I want, but looking for a structural engineer to make some suggestions and prepare a basic design that can be fabricated by my welding team. Suggest payment of hourly rates for the work. Would be great to see similar work (truss designs) that you have done.