- 8' 6" X 5'6" - 6'1" inside height - Top is 5 1/4" thick - Bottom is 4" thick - 28" X 32" 11 gauge double hinged door - 2 - 4" 11 gauge metal vents - 350' 1/2" rebar on 13" centers - 7.33 bag concrete mix - 2# polypropylene fiber per yard - 1 gallon water replacement per yard - Heavy duty metal stair ladder - 20 - 5/8" concrete bolts - Double sealed with 2 1" conseal ropes
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