raising standards worldwide

™

NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW

BSI British Standards

WB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1

UK National Annex to

Eurocode 9: Design of

aluminium structures –

Part 1-2: Structural fire design

NA to BS EN 1999-1-2:2007

Licensed copy: BSI USER 06 Document Controller, Midmac Contracting Co. W.L.L, Version correct as of 03/08/2011 11:44, (c) BSI

NA to BS EN 1999-1-2:2007

NAtioNAl ANNEx

Publishing and copyright information

the BSi copyright notice displayed in this document indicates when the
document was last issued.

© BSi 2009

iSBN 978 0 580 57346 0

iCS 13.220.50; 91.010.30; 91.080.10

the following BSi references relate to the work on this national annex:
Committee reference B/525/9
Draft for comment 08/30153319 DC

Publication history

First published January 2009

Amendments issued since publication

Date

Text affected

Licensed copy: BSI USER 06 Document Controller, Midmac Contracting Co. W.L.L, Version correct as of 03/08/2011 11:44, (c) BSI

NAtioNAl ANNEx

© BSI 2009 •

1

NA to BS EN 1999-1-2:2007

National Annex (informative) to

BS EN 1999-1-2:2007, Eurocode 9: Design of

aluminium structures – Part 1-2: Structural

fire design

Introduction

this National Annex has been prepared by BSi Subcommittee, B/525/9,
Structural use of aluminium. in the UK it is to be used in conjunction
with BS EN 1999-1-2:2007, Structural fire design.

NA.1 Scope

this National Annex gives:

the UK decisions for the Nationally Determined Parameters

a)

described in the following subclauses of BS EN 1999-1-2-2007:

2.3

—

(1)

2.3

—

(2)

2.4.2

—

(3)

4.2.2.1

—

(1)

4.2.2.3

—

(5)

4.2.2.4

—

(5)

the UK decisions on the status of BS EN 1999-1-2:2007 informative

b)

annexes; and

references to non-contradictory complementary information.

c)

NA.2 Nationally Determined Parameters

UK decisions for the Nationally Determined Parameters described in
BS EN 1999-1-2:2007 are given in table NA.1.

Licensed copy: BSI USER 06 Document Controller, Midmac Contracting Co. W.L.L, Version correct as of 03/08/2011 11:44, (c) BSI

NA to BS EN 1999-1-2:2007

2

• © BSI 2009

NAtioNAl ANNEx

table

NA.1

UK

values

for

Nationally

Determined

Parameters

described

in

BS

EN

1999-1-2:2007

Subclause

Nationally

Determined

Parameter

Eur

ocode

recommendation

UK

decision

2.3

(1)

Pa

rt

ia

l s

af

et

y

fa

ct

o

r

fo

r

m

ec

h

an

ic

al

p

ro

p

er

ti

es

of

aluminium

for

the

fire

situation

c

M,fi

=

1.0

Use

the

recommended

value.

2.3

(2)

Pa

rt

ia

l s

af

et

y

fa

ct

o

r

fo

r

th

er

m

al

p

ro

p

er

ti

es

o

f

aluminium

for

the

fire

situation

c

M,fi

=

1.0

Use

the

recommended

value.

2.4.2

(3)

the

values

of

c

G

, c

Q,1

, W

fi

and

p

V

alues

in

EN

1990

for

c

G

, c

Q,1

and

p

;

W

2,1

for

W

fi

Fo

llo

w

t

h

e

re

co

m

m

en

d

at

io

n

s

o

f

th

e

U

K

National

Annex

to

BS

EN

1990.

4.2.2.1

(1)

Classification

of

cross-sections

C

ro

ss

-s

ec

ti

o

n

s

m

ay

b

e

cl

as

si

fi

ed

a

s

fo

r

n

o

rm

al

t

em

p

er

at

u

re

d

es

ig

n

a

ss

u

m

in

g

th

e

sa

m

e

re

la

ti

ve

d

ro

p

in

0

.2

%

p

ro

o

f

strength

and

modulus

of

elasticity

Use

the

given

rule.

4.2.2.3

(5)

Design

resistance

of

beams

Design

resistance

may

be

calculated

u

si

n

g

f

o

rm

u

la

e

(4

.7

),

(

4.

9)

a

n

d

(

4.

10

)

w

h

ic

h

a

re

b

as

ed

o

n

a

ss

u

m

in

g

t

h

e

sa

m

e

re

la

ti

ve

d

ro

p

in

0

.2

%

p

ro

o

f

st

re

n

g

th

a

n

d

modulus

of

elasticity

Use

the

given

formulae.

4.2.2.4

(5)

Design

buckling

resistance

of

columns

B

u

ck

lin

g

r

es

is

ta

n

ce

m

ay

b

e

ca

lc

u

la

te

d

u

si

n

g

f

o

rm

u

la

(

4.

11

)

w

h

ic

h

is

b

as

ed

o

n

as

su

m

in

g

t

h

e

sa

m

e

re

la

ti

ve

d

ro

p

in

0

.2

%

proof

strength

and

modulus

of

elasticity

Use

the

given

formula.

Licensed copy: BSI USER 06 Document Controller, Midmac Contracting Co. W.L.L, Version correct as of 03/08/2011 11:44, (c) BSI

NAtioNAl ANNEx

© BSI 2009 •

3

NA to BS EN 1999-1-2:2007

NA.3 Decisions on the status of informative

annexes

UK decisions on the status of informative annexes in BS EN 1999-1-2:2007
are given in table NA.2.

table NA.2 UK decisions on the status of informative annexes in

BS EN 1999-1-2:2007

Annex

Description

UK decision

Annex A

Properties of alloys and/or tempers
not listed in EN 1999-1-1

May be used

Annex B

Heat transfer to external structural
aluminium members

May be used

NA.4 References to non-contradictory

complementary information

BS EN 1999-1-1:2007 is referenced in BS EN 1999-1-2:2007. the
following references contain non-contradictory complementary
information for use with BS EN 1999-1-1:2007.

PD 6702-1, Recommendations for the design of aluminium
structures to BS EN 1999

PD 6705-3, Recommendations for the execution of aluminium
structures to BS EN 1090-3

Licensed copy: BSI USER 06 Document Controller, Midmac Contracting Co. W.L.L, Version correct as of 03/08/2011 11:44, (c) BSI

NA to BS EN 1999-1-2:2007

4

• © BSI 2009

NAtioNAl ANNEx

Bibliography

For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including
any amendments) applies.

Standards publications

BS EN 1990:2002, Eurocode – Basis of structural design

BS EN 1999-1-1:2007, Eurocode 9: Design of aluminium structures –
Part 1-1: General structural rules

PD 6702-1, Recommendations for the design of aluminium
structures to BS EN 1999

1)

PD 6705-3, Recommendations for the execution of aluminium
structures to BS EN 1090-3

1)

1)

in preparation.

Licensed copy: BSI USER 06 Document Controller, Midmac Contracting Co. W.L.L, Version correct as of 03/08/2011 11:44, (c) BSI

This page deliberately left blank

Licensed copy: BSI USER 06 Document Controller, Midmac Contracting Co. W.L.L, Version correct as of 03/08/2011 11:44, (c) BSI

BSI is the independent national body responsible for preparing British Standards.
It presents the UK view on standards in Europe and at the international level.

It is incorporated by Royal Charter

.

British Standards Institution (BSI)

raising standards worldwide

™

BSI Group Headquarters

389 Chiswick High Road London W4 4AL UK

Tel [phone]
Fax [phone]
www.bsigroup.com/standards

Revisions

British Standards are updated by amendment or revision. Users of British
Standards should make sure that they possess the latest amendments or
editions.

It is the constant aim of BSI to improve the quality of our products and
services. We would be grateful if anyone finding an inaccuracy or
ambiguity while using this British Standard would inform the Secretary of
the technical committee responsible, the identity of which can be found
on the inside front cover.

Tel: [phone] Fax: [phone]

BSI offers members an individual updating service called PLUS which
ensures that subscribers automatically receive the latest editions of
standards.

Buying standards

Orders for all BSI, international and foreign standards publications
should be addressed to BSI Customer Services.

Tel: [phone] Fax: [phone]
Email: [e-mail]

You may also buy directly using a debit/credit card from the BSI Shop
on the website www.bsigroup.com/shop

In response to orders for international standards, it is BSI policy to
supply the BSI implementation of those that have been published
as British Standards, unless otherwise requested.

Information on standards

BSI provides a wide range of information on national, European and
international standards through its Library.

Various BSI electronic information services are also available which give
details on all its products and services. Contact the Information Centre.

Tel: [phone]
Fax: [phone] Email: [e-mail]

Subscribing members of BSI are kept up to date with standards
developments and receive substantial discounts on the purchase price
of standards. For details of these and other benefits contact Membership
Administration.

Tel: [phone] Fax: [phone]
Email: [e-mail]

Information regarding online access to British Standards via British
Standards Online can be found at www.bsigroup.com/BSOL

Further information about BSI is available on the BSI website at
www.bsigroup.com

Copyright

Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the
publications of the international standardization bodies. Except as permitted under the
Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval
system or transmitted in any form or by any means – electronic, photocopying, recording or
otherwise – without prior written permission from BSI.
This does not preclude the free use, in the course of implementing the standard of necessary
details such as symbols, and size, type or grade designations. If these details are to be used for
any other purpose than implementation then the prior written permission of BSI must be
obtained. Details and advice can be obtained from the Copyright & Licensing Manager.

Tel: [phone] Email: [e-mail]

WB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 2

Licensed copy: BSI USER 06 Document Controller, Midmac Contracting Co. W.L.L, Version correct as of 03/08/2011 11:44, (c) BSI