Sure thing. Let’s start with the basics—size, load capacity, and where it’ll be set up. Tell me what kind of stage you’re thinking of and what kind of crowd you’re expecting. Once we have the numbers, we can lay a solid framework and add the finishing touches that give it that extra vibe.

Sounds solid. 40 by 20 feet with a 5,000‑pound capacity is doable on a rooftop if the concrete slab can handle it. First check the building’s load rating—roofs often max around 150 lb/ft², so for 5,000 lb you need a 33‑by‑33‑foot slab or a steel deck that spreads the load. If you go steel, use 12 in. by 5 in. I‑beams, set them on concrete footings, and attach a plywood base with a ¾‑inch layer of spray‑foam for even pressure. Add a 2‑inch concrete slab on top of the plywood to keep the stage level and give you a good grip for the floor panels. For the skyline view, leave the front edge open, but put a low railing—about 36 in.—so the crowd feels close but safe. For the 3,000‑person crowd, make sure the exit paths are wide enough and that the rooftop can handle the weight of that many people. Use a modular frame so you can slide in or out side panels if you want to hide the city lights or keep the crowd in sight. That’s a good base—let’s add the sound walls and lighting next.