If the equipment is going to be based off of the same ceiling level, then you should use the same Reference Plane (or Level) to host them both. As I mentioned previously, Ducts must be associated with a Level, not a Reference Plane.
River Itchen. The River Itchen is a beautiful chalk stream which flows for approximately 28 miles from mid-Hampshire to Southampton.he source of the Itchen is situated in Cheriton, near Alresford, and flows down to the historic city of Winchester passing through nature reserve Winnall Moors, and Winchester City Mill.
The Brahmaputra River has its source in southwest Tibet. It flows there with the name Yarlung Tsangpo River. The river runs across south Tibet to penetrate the Himalayan mountain ranges in huge canyons and subsequently Arunachal Pradesh (India). In Arunachal Pradesh, it is called as Dihang.