| The
ASR-50-RBH Riser Blast Hatch is designed to be installed
on an underground shelter. It features an integrated riser
that can be ordered in custom heights to match the backfill
depth of the shelter.
It
is supplied with a coat of shop primer and includes concrete
wedge anchors for mounting it on the roof of a concrete
shelter.
The
blast lid is constructed from ASTM A-36 steel plate laterally
reinforced by 4 stress resistant steel bars. It is designed
to withstand a 7,200 pound per square foot (50 PSI) blast
load or a 1,500 pound point load. It uses a gas lift cylinder
to assist the opening. The riser tunnel is also constructed
from ASTM A-36 steel plate with strategically placed reinforcement
stiffeners.
The
hinge assembly is the same massive one used on our ASR-50-BD
Blast Doors. It features bronze bushings, grease zerks,
and an inch and half 1018 alloy steel pin.
The
two inner latches are cam operated compression latches that
compress the EPDM seal.
The
external heavy duty dead bolt cylinder style key lock has
a steel external weather guard constructed from ASTM A53
grade A steel.
Optional
viewers
The riser hatch can be supplied with a “peep sight”
wide angle viewer strategically mounted on each of the four
walls. They are mounted six inches below the hatch. This
gives you the ability to see what is directly around your
hatch before opening it.
Optional
emergency escape jack
This 3 ton bottle jack can be deployed if trees fall on
top of your hatch. In the stowed position, it nests down
behind the ladder. It must be rotated up into position before
use - but you do not have to climb a ladder with a jack
to deploy it.
Optional
external ladder extension
The riser hatch can be ordered with a removable above ground
extension ladder for assistance and added safety for personnel
entering or exiting the shelter. It fits into a socket welded
onto the outside of the riser.
Optional
internal ladder assembly
The riser hatch may be ordered with a bolt on ladder assembly.
This heavy duty steel ladder is rated for 300 pounds. It
is built to order so it fits your shelter with the proper
dimensions — the bottom rung is between 6 and 12 inches
off the floor, the top rung is 6 inches from the top of
the riser, and all the rungs in between are 12 inches apart
with the proper toe clearance from the wall. See page 5
for ordering details.
For
more information, please see the installation
and operation manual (PDF).
|
