SMACNA is increasingly advised that contractors are being required to provide elements of fire damper and combination fire/smoke damper installations which are both unnecessary and not allowed. Specifically, we refer to requirements to seal the retaining angles to the wall/floor fire rated assembly and to other directives to fill the expansion space with materials such as mineral wool, ceramic fiber or firestopping caulks.
This paper will address these issues individually and clarify these requirements in light of standard installation procedures as required by damper manufacturers. Contractors are encouraged to provide copies of this paper to building owners, architects, engineers and code officials so that all parties gain a better understanding as to the proper and approved methods of fire damper installation.
Improper Fire Damper Installation