Which governing body is responsible for sheet metal standards?

The governing body responsible for sheet metal standards is SMACNA, which stands for the Sheet Metal and Air Conditioning Contractors' National Association. SMACNA is a key organization in the HVAC industry, providing a set of guidelines and standards specifically tailored for sheet metal work, duct construction, and air conditioning installation. These standards ensure quality, consistency, and safety in the fabrication and installation processes of HVAC systems.

The organization develops detailed manuals that cover various aspects of sheet metal work, including design, installation, and maintenance practices. These standards are widely recognized and used as a benchmark for the industry, helping professionals adhere to best practices while conducting their work.

Other organizations such as ASTM (American Society for Testing and Materials), ANSI (American National Standards Institute), and ISO (International Organization for Standardization) also play significant roles in standardization across numerous industries but do not focus exclusively on sheet metal like SMACNA does. Hence, while they contribute to various aspects of material safety and performance, SMACNA's dedicated standards for sheet metal make it the correct choice in this context.