Tags: 204mm, 8", 8in, above grade, bb-800, beam, box, box beam, build, build deck, BuildDeck, ceiling, concrete, concrete floor, concrete roof, Deck, decking, dwg, eight, elevated slab, fire, fire rated, Floor, floor intersection, front, green roof, Intersection, long span, mezzanine level, rated, Roof, room, safe, saferoom, section, Shelter, side, slab, span, stirrup, suspended slab, t beam, t-beam, tornado shelter, wall