Contents

Objectives of the Background to the Eurocode Eurocode National Applications Matters specific to this Safety Design Design 1.2 Distinction between Principles and Application 1.3 Normative 2 Basic principles and 2.1 Performance 2.3 Design values of material 2.4 Assessment 2.4.5 Design assisted by 3 Material 3.2 Mechanical properties of aluminium 3.3 Thermal properties of aluminium 3.4 Fire protection 4 Structural fire 4.2 Simple calculation 4.3 General calculation Annex A (informative) Properties...

Properties of aluminium alloys not listed in ENV

Table A.l. 0.2 proof stress ratios k for aluminium alloys at elevated temperature for a 2 hour exposure period. Table A.l. 0.2 proof stress ratios k for aluminium alloys at elevated temperature for a 2 hour exposure period. As a first order approximation the values of 0,2,0 for alloy EN AW-3003 may be used for alloy EN AW-3103.

National foreword

This Draft for Development has been prepared by Subcommittee B 525 9 and is the English language version of ENV 1999-1-2 1998 Eurocode 9 Design of aluminium structures Part 1-2 General rules - structural fire design, as published by the European Committee for Standardization. ENV 1999-1-2 1998 results from a programme of work sponsored by the European Commission to make available a common set of rules for the structural and geotechnical design of building and civil engineering works. This...

H

2) wall above and h > l,25w or no wall above a) No forced draught (2) If the column is between two openings, the total emissivities e and of the flames on sides m and n should be determined from the expression for e given in Annex C of ENV 1991-2-2 using a value for the total flame thickness X as follows - for side m X T Xi C (B.9a) - for side n X Xi D (B.9b) m is the number of openings on side m n is the number of openings on side n Xi is the flame thickness for opening i. (3) The flame...

Structural fire design

(1)P Aluminium alloy structures can be insulated by fire protection material, protected by heat screens or other method which limits the temperature rise of the aluminium alloy element. (2)P The assessment of structural behaviour in a fire design situation shall be based on one of the following methods, or on a combination of them - simple calculation method applied to individual members (3)P Simple calculation methods are simplified methods which give conservative results. (4)P General...

Heat transfer to external aluminium structures

1 In this Annex B, the fire compartment is assumed to be confined to one storey only. All windows or other similar openings in the fire compartment are assumed to be rectangular. 2 Annex C of ENV 1991-2-2 1995 should be used to determine the temperature of the compartment fire, the dimensions and temperatures of the flames projecting from the openings, and the radiation and convection parameters. 3 A distinction should be made between members not engulfed in flame and members engulfed in...

Annex C informative Configuration factor

1 The configuration factor fy is defined in 1.3 1 P. It measures the fraction of the total radiative heat leaving a given radiating surface which arrives at a given receiving surface. Its value depends on the size of the radiating surface, on the distance from the radiating surface to the receiving surface and on their relative orientation. 2 In this Annex all radiating surfaces are assumed to be rectangular in shape. They comprise the windows and other openings in fire compartment walls and...

Rules Structural fire design

Eurocode 9 Conception et dimensionnement des structures en aluminium - Partie 1-2 R gles g n rales Calcul du comportement au feu Eurocode 9 Bemessung und Konstruktion von Aluminiumbauten - Teil 1-2 Allgemeine Regeln -Tragwerksbemessung f r den Brandfall EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROP EN DE NORMALISATION EUROP ISCHES KOMITEE F R NORMUNG EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROP EN DE NORMALISATION EUROP ISCHES KOMITEE F R NORMUNG Central Secretariat rue de Stassart,...

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2 Flame axis intersects column axis above top of opening b Forced draught condition Figure B.6 Column engulfed in flame 2 The emissivity of the flames fy for each of the faces 1,2, 3 and 4 of the column should be determined from the expression for s given in Annex C of ENV 1991-2-2, using a flame thickness X equal to the dimension X indicated in figure B.6 corresponding to face i of the column. 3 For the no forced draught condition the values of A, at the level of the top of the opening should...

Material properties General

1 The thermal and mechanical properties of aluminium alloys shall either be determined from the following or else in conformity with existing EN, prEN or ISO product standards. 2 The thermal properties of fire protection materials shall be determined in conformity with existing EN, prEN or ISO product standards. 3 The values of material properties given in prENV 1999-1-1 Section 3 shall be treated as characteristic values. 3.2 Mechanical properties of aluminium alloys 3.2.1 Strength properties...

Foreword

The Structural Eurocodes comprise a group of standards for the structural and geotechnical design of buildings and civil engineering works. They are intended to serve as reference documents for the following purposes a As a means to prove compliance of building and civil engineering works with the essential requirements of the Construction Products Directive CPD . b As a framework for drawing up harmonised technical specifications for construction products. They cover execution and control only...