The present utility model relates to a drainage structure includes drainage duct being defined by an elongated hollow body having a front wall, a rear wall, a top wall and a bottom wall. The front wall has a front passage at the upper portion thereof and the rear wall having a rear passage. The drainage duct also has a plurality of spaced apart strainer members being pivotally secured to the front wall and in direct communication with the front passage, said strainer members also has having a plurality of holes.