This hatch is mounted horizontally. It features a gas charged damper that aids in opening.
The opening size is 32 by 32 inches.
American Safe Room manufactures this flat blast hatch designed to be installed with an underground shelter. It is a "flat" hatch, compared to the riser hatch, which features an integrated riser that can be ordered in custom heights to match the backfill depth of the shelter.
It is designed to be bolted down onto a shelter top with included concrete wedge anchors or welded to a steel shelter.
It features plasma cut mounting slots instead of round holes to allow movement in two directions for easy positioning on the wedge anchors.
82 PSI pressure rating
The blast lid is constructed from ASTM A-36 steel plate reinforced by stress resistant steel angle pieces. It is designed to withstand an 82 PSI blast load.