> >It's up to the designers which option to use, but fire-exits and all doors leading to them *must* be "fail safe" so that nobody is trapped (doesn't need to be a fire - how would you feel about spending the weekend in the office because a power cut started on Friday afternoon? :-) How about an office that can't open the parking garage gate after a power glitch, and it's 2AM so you can't take the bus home either, even though it would be a 90 minute trip.. _______________________________________________ http://www.piclist.com View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist