Explosion Relief Panels on Haz-Safe Buildings:

Bottom hinged, reset-able, magnetic released, shock absorbing, cable tethered, insulated (R-9), FM tested and approved 4´x 8´ explosion relief panel. Drop down shutter (gray box) fire rates explosion relief panel's opening. Steel screen resists intruder entry and objects from being propelled out during explosion. Magnetic contact connected to security alarm system. Above top hinged panels are the only explosion-proof relief panels ever tested by FM. Haz-Safe Buildings version are bottom-hinged to force blast effects upward. [See Explosion Video]

Explosion Relief Panels on Conventional Damage Limiting Construction:

BEFORE: Existing 13' wide x 6' high "homemade" explosion relief vent held in place with FM approved fasteners that can be utilized with any dimensioned metal or FRP panels. In this case the fasteners uses washers designed to collapse upon impact of an explosion which do not let go simultaneously so the panel is misshapen or ripped into shrapnel as it tears away from the opening in the wall. User concerned with air and fume infiltration getting out and moisture getting in... AFTER: Installation of Haz-safe Blast Relief Wall Assembly equipped with (4) custom 6' 3" wide x 2' 9" high bottom hinged, single adjustable setting magnetic release, cable tethered, aluminum relief panels. Panels are factory pre-installed within a ¼" thick tubular steel frame and shipped to site for installation in existing wall opening.
Inside of the room shows how tight the seal is and the bolts inserted through the ¼" thick 8" deep assembly frame into the existing poured concrete wall. There is an optional stainless steel angular "picture frame" frame trim that can cover the foam sealing material. Close up of the fastening and the sealing of the Haz-safe Blast relief Assembly on outside wall. Notice the rain drip edge. Should a fire occur in the room and melt away the relief panel or an explosion start a fire after the relief panels open, the existing buildings roof overhang will catch fire from the flames coming out of the wall opening. A blast shaft installed over the exterior of the relief panels would protect the roof overhang from catching fire.