The signs are intended to be used to identify the actual fire-rated integrity of a wall. Therefore, prior to placing the sign, it is essential that the wall be verified and, if found to be deficient, improved to conform with the intended qualities. Only after sealing all holes and penetrations and verifying the presence and proper installation of appropriate duct dampers should the sign be installed. We assume no responsibility for the integrity of the wall upon which a sign may be affixed.