Pro-Bel's roots date back to the 1970's when Marc Lebel operated a high rise window cleaning company under the name Pro-Bel Services. It was in the 1980's that Pro-Bel recognized that in order for window cleaning activities to be carried out properly, buildings must have properly identified and engineered anchorages for suspending platforms, work cages, and bosun's chairs - all with accompanying and independent lifeline anchorages. From the 1970's to the 2000's, in all its designs, Pro-Bel subscribed to a weighty notion contained in labour regulations, cited throughout North America. It is known as the "general duty clause", which, in essence, is legislation that provides an obligation on the part of building owners and managers to provide a place of employment...free from recognized hazards that are causing or are likely to cause death or serious physical harm. The "general duty clause" is an over-riding provision intended to correct conditions where there is no specific applicable labour standard. This is the Section of the respective U.S. or Canadian "Act" that building owners and construction professionals must be aware of when making provision for suspended maintenance anchorages on rooftops. It is an area in which Pro-Bel is very familiar with when it comes to protecting the interests of its clients.