There are a number of articles and books written on lean manufacturing techniques and lean construction, including many in the pages of Snips about applying lean in sheet metal shops. This article will highlight basic lean principles and tools specific to the spiral fabrication shop.
A new equivalent round duct calculator app from Eastern Sheet Metal allows sheet metal contractors and installers, including HVAC engineers and contractors, to convert rectangular and flat-oval duct dimensions to round. It can also convert rectangular duct to flat oval.
When renovations called for the addition of a roof to the 19-year-old Arthur Ashe Stadium in the New York City borough of Queens, sheet metal contractors were hired to make and install ductwork at the tennis facility named for the late tennis star.
In 1948, research by R.G. Huebscher established flow resistance for different shapes of ductwork at equal velocities, which allowed the creation of the duct-sizing calculator or “Ductulator” for picking equivalent sizes of rectangular ducts based on the baseline round duct size.
Ductwork isn’t usually something that gets all the attention in a finished industrial, commercial or residential space. As long as it’s working properly, a building’s occupants could probably care less about the aesthetics behind the system keeping them cool or warm.
Ductwork used to channel or direct air to spaces throughout a building can impact the efficiency of the structure’s HVAC system. That’s why it’s important to properly design and install ductwork and its components, including the dampers used to regulate or stop airflow.
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