Engineering drawings

I need some engineering drawings for clear span steel work to build some roofs. One roof is roughly 17m x 4.5m x 4.1 high. The second one is 17.5m x 7.5m x 4.4m high but this one is cantilever with clear span and no posts down the long side. The third roof has a long block wall to attach down one side and is 14.5m at widest point tapering to 3.8m so provide working space for a work shop - the opposite side of this can have as many posts necessary. In all instances I am using sandwich panel fire rated insulated roofs (100-200mm thick) about 15kgs/sq/m. Please let me know if this is within your scope and we have a lot of ongoing work. I can send rough outlines and pictures of the sites. I already have measurements.