My stage is a proscenium stage with a small apron and orchestra pit. Before my time a pit cover was built and installed. I would like to add a thrust onto the stage that pushes 12 feet into the audience seating. It will curve back to the apron, basically the bow of a ship jutting into the audience. To do this I will need to remove a few seats and create a walkway around the thrust wide enough to not impede egress. I have tried to research this extensively. I can not find any building code, fire code, or osha code that prevents me from doing it. But I could be one sided in my search so I only see what I want to. This is what I think I know: IBC code 105.2 exempts me from needed to get a city permit. IBC 410.4.1 may consider this to be a temporary platform. IBC 410.7.2 says I am not changing the "stage" enough to effect fire code so I don't need to install sprinklers. I am hoping for some input on weather or not I can do this. What am I missing that keeps me from doing this. If you include the code that backs me up or proves me wrong so I can look up any ideas you have that would be awesome. Thanks for any help you may have.