BS EN 15254-5:2018 pdf download

BS EN 15254-5:2018 pdf download.Extended application of results from fire resistance tests – Non-loadbearing walls
1 Scope
This document defines rules for extended applications, provides guidance, and, where appropriate, defines procedures, for variations of certain parameters and factors associated with the design of internal and external non-loadbearing walls constructed of metal sandwich panels and that have been tested in accordance with EN 1364-1, which could generate a classification in accordance with EN 13501-2. EN 15254-5 applies for self-supporting, double skin metal faced sandwich panels having an insulating core bonded to both facings as defined in EN 14509.
4 Establishing the field of extended application
4.1 General
An extended application analysis is required when the application differs in one or more parameters from the tested one described in the test report and/or in the classification document, and which is not covered by the direct field of application of the classification document. Extended application is a prediction of the expected fire resistance of fire resistant metal faced sandwich panels. It may be based on interpolation between or extrapolation from test data. The fundamental consideration shall be that the fire resistant metal faced sandwich panels after extension would achieve the required fire performance if it were to be tested according to EN 1364-1. The extended application of test results from metal faced sandwich panels used as a non- loadbearing wall shall be based on the reference fire test results performed according to EN 1364-1 and may be complemented by one or more additional tests. The general rules in EN 15725 shall be followed.
4.2 Assumptions in the extended application
The following assumptions are considered when evaluating extended applications for sandwich panels:
a) the wall is required to provide fire resistance in the end-use condition; relevant classes are given in EN 13501-2;
b) the wall is assumed to be exposed on the entire face of one side to the standardized heating conditions given in the EN 1363-1 fire resistance test specification or to alternative and additional procedures given in the EN 1363-2;
c) the structure above and below the wall does not deflect vertically during the fire exposure period; this simulates the non-deflecting nature of the test frame which forms part of the furnace test apparatus;
In reality constructions deflect and this should be taken into account by the building designer when designing the building and planning the constructional details so that no vertical loads are applied to the wall.
d) after delamination of the fire-exposed facing the dead load of the sandwich panels is carried by a support structure to which the ends of the sandwich panels are attached;
e) the support structure has at least the same loadbearing capacity, R, of the resistance to fire performance as the sandwich panel wall regarding integrity;