70 Gross Floor Area

 

The sum of the areas of all above grade floors of a building measured to the glassline, or where there is no glassline, to the outside surface of the exterior walls, or where buildings are separated by firewalls, to the centre line of the common firewalls, and includes all mechanical equipment areas and all open areas inside a building that do not contain a floor including atriums, elevator shafts, stairwells and similar areas.