Overpressure 07
Overpressure 07 :
Any pressure, above atmospheric, caused by a blast. There are three clarifying definitions: (1) Free-field overpressure-the pressure exerted by the blast wave at a location where the wave is free from interaction with objects. (2) Reflected pressure-the pressure exerted by the blast wave on those surfaces of an object that face the direction of travel of the blast wave. The reflected overpressure is greater than the free-field overpressure and is greatest when the surface is perpendicular to the direction of travel of the blast wave. (3) Side-on overpressure-the pressure exerted by the blast wave on those surfaces of an object that are parallel to the direction of travel of the blast wave. The side-on overpressure is equal in magnitude to the free-field overpressure. (An OSH glossary used in safety and health at work which is, adopted by ILO
