How can violence at the workplace be avoided?

A recent study by the American Society of Safety Engineers says that
just 1% of U.S. construction employers have a formal Antiviolence Policy —
despite the fact that OSHA requires companies to supply their employees
with a safe workplace. To be effective, an antiviolence policy has to
educate everyone about the possible consequences of such talk—and encourage employees to report threatening behavior long before
it erupts into assault or even bloodshed. Companies need to train construction managers to keep their eyes and ears open and respond appropriately to violations, which may include anything from a concerned chat to immediate dismissal.