A rectangular duct layout will typically use which method for accurate design?

The parallel line method is commonly used for accurate design in a rectangular duct layout due to its straightforward approach to creating a two-dimensional duct run. This method allows for the efficient arrangement of ducts, promoting ease in layout and dimensions.

Using the parallel line method, designers can draw the main duct and its branches in a systematic way. This involves drawing parallel lines to represent the ducts, allowing for precise measurements of duct widths and heights needed in construction. It also simplifies the process for calculating areas and ensuring that the design meets required airflow specifications.

This method is particularly beneficial in rectangular duct applications because it aids in keeping the layout organized and manageable, reducing potential errors that could arise from more complex methods. It also ensures that the components align properly, which is essential for optimal airflow and system performance.

The other methods mentioned, like radial line, conical, and segment methods, cater to different scenarios that are not typically aligned with rectangular ductwork design, making the parallel line method the most suitable choice for this application.