> On Saturday 11 April 2009 08:31:55 Joe Greco wrote: > > Speaking of that, a manhole cover is > > typically protecting some hole, accessway, or vault that's made out of > > concrete. > > An oxyacetylene torch or a plasma cutter will slice through regular steel > manhole covers in minutes.
Yes, but we were discussing locked covers, which (given the underlying assumptions of this discussion) might be a bit heavier. Further, it would be vaguely suspicious and more noticeable for a "road crew" or "power company" truck to be deploying such gear, might draw more attention. > The locking covers I have seen here put the lock(s) on the inside cover cam > jackscrew (holes through the jackscrew close to the inside cover seal rod > nut), rather than on the outside cover, thus keeping the padlocks out of the > weather. More expense. :-) > One way of making a site more resistant to 'inside job' issues is with SCIF- > like controls (see > http://en.wikipedia.org/wiki/Sensitive_Compartmented_Information_Facility ) > and using combination locks such as the Sargent and Greenleaf 8077AD for > control, and the S&G 833 superpadlock for security (see > http://www.sargentandgreenleaf.com/PL-833.php ). The tech would have the > 833's key, and the area supervisor the combination. The 8077AD's combination > is very easily changed in the field, and could be changed frequently. The > key > to this method's success is that the keyholder to the 833 cannot have the > combination, and the holder of the combination cannot have an 833 key. > Requires a certain atmosphere of distrust, unfortunately. And slows repairs > way down, especially if the 833's key is lost.... Certainly it is *possible* to do it, but given the other variables, does it make *sense*? Consider what I was saying about just going to town with a backhoe. You have a lot to protect. ... JG -- Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net "We call it the 'one bite at the apple' rule. Give me one chance [and] then I won't contact you again." - Direct Marketing Ass'n position on e-mail spam(CNN) With 24 million small businesses in the US alone, that's way too many apples.