Which symbol is used to represent a cross-section of a supply duct?

In blueprint reading, a cross-section of a supply duct is typically represented by a specific symbol that conveys essential information about the duct’s dimensions and layout. The symbol that indicates a cross-section effectively communicates to architects, engineers, and construction personnel the design intent without needing extensive text descriptions.

The choice that represents a cross-section of a supply duct often utilizes a distinct visual cue, which is easily recognizable to those familiar with mechanical drawings and HVAC systems. This specific symbol illustrates the duct's shape and size when viewed from a particular angle, allowing for clear understanding of how it fits into the overall system.

The other symbols may represent different components or concepts related to HVAC systems, but they do not specifically indicate the cross-section of a supply duct. Hence, recognizing the standard symbol is crucial for interpreting blueprints accurately and ensuring proper implementation during construction or renovation tasks.