This document defines rules for extended applications@ provides guidance@ and@ where appropriate@ specifies procedures@ for variations of certain parameters and factors associated with the design of internal non-loadbearing ceilings constructed of metal faced sandwich panels that have been tested in accordance with EN 1364?2@ which could generate a classification in accordance with EN 13501?2. This document applies to self-supporting@ double skin metal faced sandwich panels@ which have an insulating core bonded to both facings as defined in EN 14509.