A single wheelchair space shall be 36 inches (915 mm) wide minimum Where two adjacent wheelchair spaces are provided, each wheelchair space shall be 33 inches (840 mm) wide minimum.
Definition of RTU in Construction Roof top units. The RTU is a piece of mechanical equipment that is designed to heat, cool, ventilate by providing air flow for any combination of the three.
There are no differences between an AHU and an RTU except for the fact that an RTU is placed on the rooftop. The Air Handling Unit is a huge metal box, which helps in conditioning and circulating the air to create an ideal atmosphere.