NABCO ICU Manual Sliding doors provide more room access with a clear door opening of 44 1/8″ (at 96″ frame width) in a full-open breakout, trackless-style unit. They are ideally suited for ICU/CCU rooms designated as “infection control,” where airborne germs must be kept from spreading to other areas. Large access areas are required for the trouble-free transport of beds, gurneys, and other medical equipment, especially in intensive care and cardiac care units.