Apprentice question
Verify first
Verify before you commit. Cheap to catch now.
A long duct run usually needs restraint for more than one direction. Check the seismic layout and add the missing brace direction by approved detail.
['Side-to-side bracing alone does not control end-to-end movement. A long run can still telescope, swing, or pull joints if longitudinal restraint is missing.', 'Check the project seismic drawing/manual detail, brace spacing, run length, anchor substrate, and conflicts. Bring the foreman the missing direction before inspection.']