Every 36 hours on average, American local news outlets deliver a new report on violence at a McDonald’s. A group of employees in Chicago say workers bear the brunt of such incidents — enough to constitute a pattern of regular on-the-job violence they want the company to address across the U.S. In a complaint filed with the Occupational Safety and Health Administrationon Monday, the workers at one location described being threatened with guns, attacked with hot coffee and having to dodge food thrown by a disturbed customer. “Despite the frequent incidence of workplace violence, our employer has done nothing to implement safety measures to protect us,” the workers allege in the complaint, which names McDonald’s Corp. and franchisee Oscar Perretta. The employees and other Chicago-area workers, who are working with the union-backed Fight for $15 campaign, are also sending a letter asking OSHA to open a “systemic” investigation into the corporation’s handling of workplace violence in its thousands of U.S. locations. Their letter cites data from the National Employment Law Project, which counted 721 local media reports of violence at U.S. McDonald’s stores over the past three years, most of them involving guns.