Feature Description Door Leaf Heavy-duty steel construction, typically 1/4″ to 1″ thick, reinforced with bars or ribs Frame Heavy-duty steel frame, securely anchored to the surrounding structure Hinges Blast-resistant hinges, designed to withstand high pressures Locks Blast-resistant locks, capable of securing the door under blast conditions Seals Intumescent seals, which expand when exposed to heat to create a tight seal Blast Resistance Varies depending on the type of door, typically rated in pounds per square foot (psf)

