Good day, in a project I am trying to do (conference hall), the span is 25 meters. We want to pass this place with cassette flooring. Then the tribune of the conference hall comes, I chose the floor thickness of 15 here, how do you think it is ideal? With the definition of 120 width 170 cm high beam between columns, the columns are defined as a 150 cm circular column in the rescue, and the cassette is 80 * 80 * 40 (height) the height of the beam that seems to me here, and how do you think this beam at 25 meters span? NOTE: Should I make composite in order to strengthen the beam? (Should I transfer the system to sap2000 and analyze it composite) I'm waiting for your suggestions, friends? I'm waiting for your suggestions, my friends.