A building may look simple from the outside, but the space behind its walls and ceilings can be very crowded. Electrical conduits, air ducts, plumbing pipes, cable trays, fire protection lines, structural beams, and equipment supports often need to pass through the same areas. When these systems

A building may look simple from the outside, but the space behind its walls and ceilings can be very crowded.   Electrical conduits, air ducts, plumbing pipes, cable trays, fire protection lines, structural beams, and equipment supports often need to pass through the same areas. When these sy