This document provides guidance and, where appropriate, defines procedures for variations of certain parameters and factors associated with the design of lightweight partitions which have been tested in accordance with EN 1364-1, and classified according to EN 13501-2. This document only applies to non-loadbearing lightweight partitions with a single steel framework, provided at both sides with a lining. The lightweight partition can be insulated or not with a mineral wool insulation. This document does not apply to any other types of non-loadbearing walls considered in EN 1364-1.