The need for 24 hour office chairs has grown exponentially during the last decade. This is related to people in general working longer hours and businesses having to accommodate the global marketplace. It is not unusual to have on call support for businesses that serve the global range of time zones. Because of this, heavy duty chairs that can stand up to constant 24 hour a day use are needed. These heavy duty office chairs are also designed to accommodate people of greater weights and girth. You may expect to pay 20 to 50% more for these extra sturdy office chairs.