Overview of shift work hazards. Shift Work Shift Work This section addresses work shifts with either extended hours- or work hours that fall outside of the standard 8-hour workday. Overview Overview The standard 8-hour workday is considered to be within the hours of 7 am and 6 pm. According to the National Institute for Occupational Safety and Health (NIOSH), approximately 15 million Americans work hours outside of the standard workday, which is referred to as shift work. It is important to note, that while OSHA does not give specific regulations on shift work, those employees that work shifts are guarded under the General Duty […]