RIYADH: The Big 5 Construct Saudi, organized by dmg events, returns as the largest construction event in the Kingdom, taking place across two weeks, from Feb. 15-18 and Feb. 24-27, 2025, at the ROSHN Front Exhibition and Conference Center in Riyadh.RIYADH: The Big 5 Construct Saudi, organized by dmg events, returns as the largest construction event in the Kingdom, taking place across two weeks, from Feb. 15-18 and Feb. 24-27, 2025, at the ROSHN Front Exhibition and Conference Center in Riyadh.