ENV 13381-4:2002

Foreword
1 Scope
2 Normative references
3 Terms and definitions, symbols and units
4 Test equipment
5 Test conditions
6 Test specimens
7 Installation of the test specimens
8 Conditioning of the test specimens
9 Application of instrumentation
10 Test procedure
11 Test results
12 Test report
13 Assessment
14 Report of the assessment
15 Limits of the applicability of the results of the
   assessment
Annex A (normative) Test method to the smouldering fire
        or slow heating curve
Annex B (normative) The applicability of the results of
        the assessment to sections other than 'I' or 'H'
        sections
Annex C (normative) Measurement of properties of fire
        protection materials
Annex D (normative) Fixing of thermocouples to steel work
        and routing of cables
Annex E (normative) Correction for discrepancies in thickness
        between loaded and equivalent unloaded sections
Annex F (normative) Assessment methodology: Differential
        equation analysis (variable lambda approach)
Annex G (normative) Assessment methodology: Differential
        equation analysis (constant lambda approach)
Annex H (normative) Assessment methodology: Numerical
        regression analysis
Annex J (normative) Assessment methodology: Graphical
        presentation
Bibliography

This part of this European Prestandard specifies a test method for determining the contribution made by applied fire protection systems to the fire resistance of structural steel members, which can be used as beams, columns or tension members. The evaluation is designed to cover a range of thicknesses of the applied fire protection material, a range of steel sections, characterized by their section factors, a range of design temperatures and a range of valid fire protection classification periods.This European Prestandard applies to fire protection materials where the gap between the material and the flange faces of the steel member is less than 5 mm in size. Otherwise, the test methods in prENV 13381-1 or prENV 13381-2, as appropriate, apply.This European Prestandard contains the fire test which specifies the tests which should be carried out to determine the ability of the fire protection system to remain coherent and fixed to the steelwork, and to provide data on the thermal characteristics of the fire protection system, when exposed to the standard temperature/time curve specified in EN 1363-1.In special circumstances, where specified in national building regulations, there can be a need to subject reactive protection material to a smouldering curve. The test for this and the special circumstances for its use are described in annex A.The fire test methodology makes provision for the collection and presentation of data which can be used as direct input to the calculation of fire resistance of steel structural members in accordance with the procedures given in ENV 1993-1-2.This European Prestandard also contains the assessment which prescribes how the analysis of the test data should be made and gives guidance on the procedures by which interpolation should be undertaken.The assessment procedure is used to establish:a)on the basis of temperature data derived from testing loaded and unloaded sections, a correction factor and any pra