Shock Mounting of Mechanical Equipment. All permanent mechanical equipment such as motors, compressors, pumps and compactors which, because of their rotation, reciprocation, expansion and/or contraction, turbulence, oscillation, pulsation, impaction or detonation, is determined by the Building Official to be a source of structural vibration or structure-borne noise shall be shock mounted with inertia blocks or bases and/or vibration isolators in a manner approved by the Building Official. Domestic appliances which are cabinet installed or built into the individual units, such as clothes washers and dryers, or other appliances which are determined by the Building Official to be a source of structural vibration or structure-borne noise, shall be isolated from cabinets and the floor or ceiling by resilient gaskets and vibration mounts approved by the Building Official. The cabinets in which they are installed should be offset from the back wall with strip gasketing of felt, cork or similar material approved by the Building Official. Where such appliances utilize water, flexible connectors shall be installed on all water lines. If provision is made within the units for the installation of nonpermanent appliances such as clothes washers and dryers, then permanent rubber mounting bases and surface plates shall be installed in a manner approved by the Building Official.