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11-22-2013, 12:35 PM
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#7 |
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User
Join Date: Mar 2008
Location: Marco Island, Florida
Posts: 4,867
Thanks: 1,685
Thanked 1,917 Times in 1,193 Posts
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An architect friend who has a multimillion NFA collection has en entire, reenforced concrete room with a similar bookcase opening at the end of a hallway. His is a two ton door that opens on a screw jack, but same idea.
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