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<p>[QUOTE=&quot;ratio411, post: 1301757, member: 26729&quot;]I cut concrete for a living.</p><p>A bank built an addition to their vault on the back of their building. When the addition was done, but for one access wall still open, the bank was ready to cut a doorway into the old vault so that the new vault could be joined to it.... Make sense?</p><p><br /></p><p>We came to cut the doorway in the concrete vault wall. It was a big deal, with rent-a-cop security and local deputies all around, since the vault contents would be exposed to the outside world for a day.</p><p><br /></p><p>The bank moved the safe deposit boxes away from the wall in one section about 4&#039; wide, where we would cut in the door.</p><p><br /></p><p>We cut the door in.</p><p><br /></p><p>After removing the concrete from the wall, we discovered that the layout of the doorway was misplaced by whomever (not our responsibility), and the right side vertical cut for the doorway was about 2&quot; over into the back of the safe deposit boxes.</p><p><br /></p><p>End result was our blade cut a 7&#039; tall x 3/16&quot; wide slot into the back of the boxes, clean through the steel into the interior contents...</p><p>The boxes exposed by the cut were full of the liquid by product of cutting reinforced concrete, we call it &#039;slurry&#039;.</p><p>The bank manager had to contact all of the box owners to tell them their boxes were compromised and whatever was in them was probably ruined.</p><p><br /></p><p>IMO, the only valueables that I could imagine making it through this would be slabbed coins.</p><p>Paper of any kind, documents, etc... would be toast, even possibly unidentifiable after exposure like this.</p><p>Coins would be exposed to the acid nature of the slurry, as it is full of lye and lime.</p><p><br /></p><p>This event, and the time the FBI investigated all the local cutters because a bank robbery was commited by sawing into a concrete vault at night, will stick with me.</p><p><br /></p><p><b>Edit:</b></p><p>I didn&#039;t take any pics of that job, but I do have pics of the process of sawing a door into a wall...</p><p>[ATTACH]146135.vB[/ATTACH][/QUOTE]</p><p><br /></p>