DIN EN 15254-7:2018-06

European foreword....................................................................................................................................................... 3
1 Scope.................................................................................................................................................................... 4
2 Normative references.................................................................................................................................... 4
3 Terms, definitions, symbols and abbreviations...................................................................................4
3.1 Terms and definitions ................................................................................................................................... 4
3.2 Symbols and abbreviations .........................................................................................................................6
4 Establishing the field of extended application .....................................................................................6
4.1 General................................................................................................................................................................ 6
4.2 Assumptions in the extended application..............................................................................................7
5 Rules for extended applications of the tested product/construction..........................................7
5.1 General................................................................................................................................................................ 7
5.2 Variations in the materials of the product.......................................................................................... 10
5.2.1 General............................................................................................................................................................. 10
5.2.2 Variations in the metal sheets................................................................................................................. 10
5.2.3 Variations in the adhesive ........................................................................................................................ 11
5.2.4 Variations in the core material ............................................................................................................... 11
5.3 Variations in the construction................................................................................................................. 12
5.3.1 Variations in span length .......................................................................................................................... 12
5.3.2 Variations in the panel thickness........................................................................................................... 13
5.3.3 Variations in the longitudinal joint construction............................................................................. 13
5.3.4 Variations in the boundary conditions and fixing system............................................................. 13
5.3.5 Length and width of ceiling construction............................................................................................ 14
5.4 Interaction between the factor influences.......................................................................................... 14
5.5 Support structure......................................................................................................................................... 14
5.6 Heating conditions....................................................................................................................................... 14
6 Calculation methods and additional measurements ...................................................................... 15
6.1 Calculation methods.................................................................................................................................... 15
6.1.1 General............................................................................................................................................................. 15
6.1.2 Calculation of strength properties......................................................................................................... 15
6.2 Additional measurements to be carried out in the reference test............................................. 15
7 Report of the extended application analysis...................................................................................... 15
Annex A (informative) Typical behaviour of a sandwich panel ceiling when exposed to fire ........ 17
Annex B (informative) Typical examples of sandwich panel ceiling end fixings to support
structure.......................................................................................................................................................... 18
Annex C (normative) Rules and calculation methods for extending the span length of
sandwich panel ceilings............................................................................................................................. 20
C.1 General............................................................................................................................................................. 20
C.2 Calculation of allowable span length .................................................................................................... 20
C.3 Calculation of catenary force ................................................................................................................... 21
Bibliography....................................................................................................................