Rooftop structure definition

Rooftop structure means any apparatus or structure which is reasonably required to be located on and attached to the roof, being an apparatus or structure which is—
Rooftop structure means an enclosed or unenclosed structure on or above the roof of any part of a building including a rooftop anchorage for the attachment of solar panels to a roof as part of a solar energy system installation.
Rooftop structure means elevator penthouses, elevator landings, stair access and landings, mechanical equipment, chimneys, ventilations systems, solar heating panels, green roof systems or similar structures that project above a roof