The door is constructed with an envelope of 3/16 inch steel plate - but after you hang it in place, you fill it with concrete - no forms necessary - the skins are in place. This construction method keeps the door relatively light for installation - and once it is filled with cured concrete, it has a lot of dense mass between you and whatever fallout is outside your shelter. It also helps to prevent anyone from using a cutting torch to gain access through the door because concrete doesn't "burn."
29.3.10
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High pressure concrete-filled blast doors:
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1 comment:
Concrete Filled Blast Doors is the best way to secure your family. Thanks for sharing with us.
Thanks
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