Abstract—The renewed patterns of barriers to protect infrastructures are required against the advanced styles of terrorist attacks. The wave interference concept is the base for the fence type barriers to be useful to mitigate the blast loads effects. In this paper, the performance of six short/long arranging of steel angles’ rows is compared to each other. The main concern is oriented to analyze the results of the mid-height level gauges’ positions. While comparing systems, the total weight of systems is maintained constant. The mitigation percent criteria mathematical method is employed to compare the rows’ systems mitigation percentages. The parametric studies disclosed that double rows system is better than a single one, therefore, the double rows cause the increasing of the reflected wave which enhances the mitigation percentages. Double long rows system achieves the most powerful attenuation to impulsive forces and satisfies a noticeable decrease for the peak overpressure. Using single or double short steel angles’ row slightly enhances the mitigation percent especially at the mid-height gauges. The results concluded that using double rows system that includes one or both long rows is a more powerful fence to satisfy higher impulse mitigation percentage for humans and the structure as well.