Hello, Ms. Nurgül, We have 3 criteria in the calculation of the effective width of the concrete slabs for composite floors. The 1st criterion is the 1/8i criterion of the beam span. If we have 20 mt beams, it comes to mind that 1 out of 8 should be 2.5 m. For clarity, the moderator said that l/8 is l/8 on one side and l/4 on the other hand, and we accept it for 150 cm. I couldn't understand this part. Why don't we accept 75 cm by saying l/8? good work. Sent from my SM-N920C using Tapatalk