What do heavy lines on a DC diagram represent?

Heavy lines on a DC diagram are typically used to represent water boundaries or watertight boundaries. This means that the heavy lines indicate areas that are designed to contain or manage water flow, providing structural integrity and safety in the event of flooding or leaks. These boundaries are crucial in various engineering applications, especially in marine and civil engineering, where managing water ingress and egress is a critical concern.

The correct interpretation of these lines is essential for understanding the layout and safety features of a system, allowing engineers and technicians to quickly identify key structural elements in a diagram. Understanding the representation of water boundaries helps in ensuring compliance with safety and operational standards in scenarios where water management is integral.