What is typically represented by a hidden line in MEP drawings?

In MEP (Mechanical, Electrical, and Plumbing) drawings, hidden lines are used to represent edges of components that cannot be seen in the current view. These lines typically appear as dashed or dotted lines, indicating that there are elements behind, below, or otherwise obstructed from the viewer’s line of sight. This visual convention helps maintain clarity in the drawings, allowing engineers and technicians to understand the complete layout, including areas that are not directly visible.

The use of hidden lines is essential because it communicates critical information about the spatial relationships and dimensional arrangements of components within a system, thus ensuring that all necessary details are considered during construction or maintenance. By incorporating these lines into MEP drawings, designers can effectively convey the relationships and locations of elements that might otherwise be overlooked.