TinnerFlow™1st YearGREEN · Field ReferenceShort S-Cleat Flange Lip
S-cleats need enough flange lip to bite. If the lip is trimmed too short, remake the end or add an approved connection fix before the joint is installed.
You trim a section of rectangular duct down to length using hand snips, but you cut the flat S-cleat connection flange lip down to less than frac{1}{4}\text{-inch} deep, leaving the metal lip too short to catch the interior fold of the S-cleat bar.
S-cleats need enough flange lip to bite. If the lip is trimmed too short, remake the end or add an approved connection fix before the joint is installed. The likely recovery is to check the condition, correct prep/setup if it is within your assignment, and bring the foreman clean information before the work creates rework overhead.
Do not send up a duct end that barely catches the S-cleat pocket.
A weak S-cleat bite can slip loose, leak, and force rework overhead.
Final direction belongs to the foreman, approved drawings/specs, manufacturer instructions, pressure/material schedule, employer policy, and AHJ/code requirements.