What is the allowable maximum deflection for protection device systems when subjected to static air loading?
First, the shutter may not be installed closer than 1 inch plus the deflection at design pressure, from the glass or object it is protecting. Second, the allowable distance from the “glass” to the shutter, when shutter is subjected to pressure is 1 inch. Therefore, the maximum deflection of a shutter, in the direction of the “glass” when subjected to static air pressure is 2 inches or L/30, whichever is largest, and L/30 opposite to the glass provided the shutter does not fail.
