I may have been in error;it appears the OSHA only recommends all weapons be barred rather than mandating same.
I know from having read a number of company policy manuals that corporations seem to do several things:first ban all weapons;second,rely on the police to deal with violence;third,reluctantly spend money on physical bariers,often with the person designing the barrier having little idea of the effectiveness.
Case in point: installing bullet-resistant windows in a facility that requires the workers to leave the “protection” of those windows and interview visitors before admitting.What good is a bullet-resistant window BEHIND you?
And the fleeing punk who just shot a police officer then went over an 8 foot chainlink fence topped with barbwire in seconds-simply by climbing at the corner using the post braces and fence clips for hand and foot-holds.
EFFECTIVE phyical barriers are costly,and can be rendered ineffective in a moment by careless ,lazy,or criminal act of someone on the “protected” side.
Here is another FR discussion related to OSHA gun policy:
http://www.freerepublic.com/focus/f-news/1928857/posts