anyone ever penetrate a drywall soffit at a 45 degree angle in an exposed spiral duct application? architect is looking for a detail of the penetration.
Yes we have had a few instances on a project where the duct was installed as shown on the mechanical drawings penetrating a sheetrock wall partition exposed to view. (Not a fire rated wall!) We took some measurements of the actual instalation and fabricated escutcheons as required.
The penetration was typical of any other non fire rated penetration exposed to view.