Flanged joints are created by bending the tip on the Uncooked duct or fitting for making a ¼” flange. Down below is the code section for your International Mechanical Code for your allowed welded duct connections sorts. Entry doorways provided in grease ducts are essential by code to permit with https://jeffreywoetg.tkzblog.com/36735328/the-ultimate-guide-to-grease-tight-extract-ductwork