What is the correct procedure for fabricating a straight length of duct with Pittsburgh seams and S and D connections?

The procedure for fabricating a straight length of duct with Pittsburgh seams and S and D connections generally starts with a clear layout of the duct dimensions and features. The correct order in the provided answer begins with the layout, which is critical for ensuring that all components are accurately positioned.

Following the layout, notching is the next step; this prepares the metal by removing sections at the edges. The creation of Pittsburgh males comes next, which form the interlocking seams. It’s essential that these males are properly formed to ensure a secure hold once assembled with the females. The process then involves forming the duct "L", which is an integral shape in ductwork for fitting into various installation requirements. After forming the duct "L", the Pittsburgh females are created to complement the males, enabling the two parts to connect securely.

The final step is to form Drives, which are essential components for securing and joining segments of duct together. This methodical approach ensures that each part of the duct is prepared correctly and sequentially, allowing for proper assembly and functionality of the finished ductwork. Each step builds on the previous one to ensure the integrity and quality of the duct system.