Ductwork is held together using what type of fastening method?

The fastening method commonly used in ductwork installation is primarily mechanical fastening techniques that provide durability and ease of assembly. Drives, which refer to drive screws or self-tapping screws designed for sheet metal, are specifically engineered for fastening duct sections securely together. These screws create a strong, tight connection that can withstand the pressures and airflow demand within the duct system.

In HVAC applications, drive screws are favored because they offer reliability over time, ensuring that the joints remain intact and that there is no leakage of air within the system. The use of drive screws also allows for easier disassembly and reassembly of ducts if needed, which is essential during maintenance or expansions of the duct system.

Other methods, while possible, may not provide the same level of effectiveness as drive screws. For example, nails, while they can hold materials together, are not suitable for the pressure and vibration conditions present in ductwork. Similarly, bolts can be used but may not be as practical for all duct types due to the need for nuts and washers, which complicate the installation. Adhesives can bond surfaces together but do not offer the same structural integrity and are typically not recommended for metal ductwork where expansion and contraction can occur. Thus, the use of drives is the most appropriate and