Class code 5538 — Sheet Metal HVAC Duct Work

This classification covers the fabrication and installation of ductwork specifically tied to HVAC systems, distinct from general architectural sheet metal work. Crews measure and cut sheet metal into duct sections, either in a shop or on-site, then assemble and hang ductwork through attics, basements, and drop ceilings to connect furnaces and air handlers to vents throughout a building.

Payroll includes duct fabricators working with sheet metal machinery in the shop, and installers who carry and hang completed duct sections at the job site. Many companies performing this work also install the HVAC equipment itself, in which case payroll may be reported under a combined HVAC classification rather than this narrower duct-specific code.

Sharp sheet metal edges are a constant source of cuts, and installers working in tight attic or crawlspace runs face awkward postures and limited visibility. Overhead installation of ductwork in ceilings adds strain from repeated lifting and holding sections in place while fastening, and ladder use for reaching ceiling-mounted duct runs contributes fall exposure.