Does anyone on LSC have a cross over stair bridge on their railroad? My club is going to need one and we need ideas and/or plans. We need enough vertical clearance for 7/8ths equipment. Our bench work is 3 feet wide. This bridge must have banisters and steps as we have many older members. I’m 71 and the baby of our G gauge group! Thanks in advance. 
No direct help but I would think that any Deck building proceedures would be more than perfect for what you need.
Check out local building dept they usually have hand-out info sheets for deck construction. Another good source would
be decking material suppliers (web sites) and I am sure there is probably at least ten thousand “how too” videos on YouTube.
Good luck with your project.
Jim Stapleton has a complete stair walk-over at the exit of his steam-up bay, not too different from the one above posted by David. He had another into the center of the track but that was recently rebuilt with ramps to be wheelchair compatible.