On Monday, Fast Food Forward, a union-back group, unveiled about a series of complaints it has filed against McDonald's Corp to Occupational Safety and Health Administration.

As per the group being backed by the Service Employees International Union, McDonald's Corp. should be held liable under federal rules for worker-safety violations at its franchised restaurants. The group has alleged violations by 19 McDonald's franchises and nine McDonald's Corp.-owned stores.

The group said that it has prepared a detailed legal argument that would be enough to convince OSHA that the fast-food company has done violations. It is said that the group would present the argument in front of OSHA in the next few weeks.

Mary Vogel, executive director of the National Council for Occupational Safety and Health, was of the view that the group has adopted the theory that is similar to the one being used by the OSHA to hold multiple employers responsible in temporary worker situations.

She said about OSHA, "looks at which company has some control over the working conditions, and certainly McDonald's does in many of these franchises".

On Monday, McDonald's also released a statement in which it said that the company and its franchises are committed to provide safe working conditions. It promised to review the allegations. McDonald's workers in 19 cities have complained about burns from grease, a lack of protective equipment and other workplace problems.

The complaints also revealed about slips on wet floors and a lack of training for handling hot fryers. The campaign is considered to be the latest move in an ongoing campaign to get pay of $15 an hour and unionization for fast- food workers. Officials involved in the campaign are pressurizing McDonald's to negotiate.

The Service Employees International Union is heading the initiative, which started more than two years back.