Raising a portion of a ceiling to give an unobstructed view of screens

In order for all students to have an unobstructed view of projected images, 11 ft. is the minimum ceiling height where the screens are mounted (higher yet, as the room length increases and screen size increases because students are further away from the screen).

If HVAC ducts, sprinkler lines and electrical conduits won't allow the entire ceiling to be high, a partial front section can be raised to accomodate the screens... with the rest of the ceiling at a lower level.
Picture of ceiling during construction. Click to see how screens are suspended on a "universal mounting board."

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