I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M s n i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e c i L
Incorporating ational N ational Amendment N o.1
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M s n i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e c i L
NA to BS EN 1992-1-1:2004
Committees responsible for this National Annex The preparation of this National Annex was entrusted by Committee B/525, Building and civil engineering structures, to B/525/2, Structural use of concrete, upon which the following bodies were represented: Association of Consulting Engineers British Cement Association British Precast Concrete Federation Ltd. Building Research Establishment Concrete Society Department of Transport (Highways Agency) Institution of Civil Engineers Institution of Structural Engineers Office of the Deputy Prime Minister Scottish Building Standards Agency UK Steel Co-opted members
This National Annex was published under the authority of the Standards Policy and Strategy Committee on 8 December 2005
© BSI 2009
Summary of pages This document comprises a front cover, an inside front cover, pages i, a blank page, pages 1 to 20, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.
First edition December 2005
Amendments issued since publication
The following BSI references relate to the work on this National Annex: Committee reference B/525/2 Drafts for comment 05/30134002 09/30180415
ISBN 978 0 580 62664 7
Amd. No.
Date
Comments
AMD 1
December 2009
See Introduction.
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M s n i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e c i L
Table deleted Table deleted
© BSI 2009
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M s n i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e c i L
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M s n i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e c i L
NA to BS EN 1992-1-1:2004 incorporating National Amendment No. 1 supersedes NA to BS EN 1992-1-1:2004, which is withdrawn. The start and finish of text introduced or altered by National Amendment No. 1 is indicated in the text by tags !". Minor editorial changes are not tagged. National Amendment No. 1 has been made to reflect Corrigendum No. 1 to BS EN 1992-1-1:2004.
© BSI 2009
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M n o s i " t . ) n a i 8 d 0 a 0 n e 2 S m y r i m a t o u i c n e a s J r r ( e e 1 . v o d i o N c n o r m u u U d E n , e g a i i r r s o C y g a n l i t a a r o p M r o c s n i n 1 i 1 a 2 9 S 9 1 i t i N E s r S B e t o v i s t e n l a U e r : 1 . y A p N e o l b c a T d e ! s n e © BSI 2009 c i L ) A
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" . ) 8 0 0 2 y r a u n a J ( 1 . o N m u d n e g i r r o C g n i t a r o p r o c n i 1 1 2 9 9 1 N E S B o t s e t a l e r 1 . A N e l b a T ) A
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" . ) 8 0 0 2 y r a u n a J ( 1 . o N m u d n e g i r r o C g n i t a r o p r o c n i 1 1 2 9 9 1 N E S B o t s e t a l e r 1 . A N e l b a T ) A !
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) A
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© BSI 2009
" . ) 8 0 0 2 y r a u n a J ( 1 . o N m u d n e g i r r o C g n i t a r o p r o c n i 1 1 2 9 9 1 N E S B o t s e t a l e r 1 . A N e l b a T ) A
!
I S B ) c ( , 6 2 : 6 0 1 r / / e a d d 1 a e e l g u e 0 t n r c o r s o a a d h a 2 l r e l / i d p d s d f o e t e 2 n d e a e o n d l a 0 b h s o e a i / t o l e l d t l h m t 3 e e n h u t c e a 2 e t o f r h d o o t f m R f h s e f e o n f o o c t c i 2 r e e n a o c e f r e o s f t a e f c a n f m a o f i d h e e e c t r e e t r h t r t e h i t c o m e t h f c m o e i m i n r m m l i r f h o i o r r e r r e r w f d e f b o t d e 5 , p d c a d h 1 3 t 5 l , r n t d s u r 0 e e n o i t a s n f " h r e h a a n o s i e a t c e m d t d h h i s s s t E e r 3 i , T r d e s h r e . 0 m c e p l t , i e n n r h s n e m e V i e t o n 5 I i h r , t p 5 t d . o u " , . , l u i 0 z l f = d o 1 s e o n a r n e / c o x d r = s i i a m e u m t k l m s d t a u h u , a n e n l q l n r e o y R n o e o n I c ! U r c i a b c a l a M n o s i " . t ) n a i d 8 0 a 0 n e 2 S m y r i a m t u o i c n e a s J r r ( d e 1 e c d . v o i o N 5 , n c o 0 r m u = u U E x d a , m n , e d g a i R i r s r o C y ! g a n l i t a a r o p M r o c s n i n 1 i 1 a 2 9 S 9 1 i t i N E s r S B e o v t i s e n t a l U e r : 1 . y A p N e o l b c a T d e ! s n e © BSI 2009 c i L c
ν
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© BSI 2009
) A
!
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M n s i o " . ) t n i d 8 a 0 a 0 n 2 e S m y r i a m t u i o n c a s J r e r ( 1 e e . v o i d o N n c m o r u U u d E n , e g a i i r r s o C y g a n l i t a a r o p M r o c s n i n 1 i 1 a 2 9 S 9 1 i t i N E s r S B e o t v i s e n t a l U e r : 1 . y A p N e o l b c a T d e ! s n e © BSI 2009 c i L ) A
) A
Licensed copy: Universiti Sains Malaysia, Universiti Sains Malaysia, Version correct as of 23/02/2011 06:26, (c) BSI
©
B S I 2 0 0 9
Eurocode A) recommendation
!Use the recommended value for concrete class ≤ C50/60. For concrete class > C50/60, transverse reinforcement should satisfy the following: α nα sω wd ≥ 0,04, in which ω wd = (Volume of confining hoops × f yd/volume of concrete × f cd) For rectangular columns: 2 α n = 1 − Σ(bi /6) b0 h0 α s = [1 − (s/2b0)] [1 − (s/2h0)] where: n is the number of longitudinal bars laterally restrained by links or ties bi is the distance between consecutive bars that are laterally restrained s is the longitudinal spacing of links b0 and h0 are the widths of confinement in the two directions (dimension to the centre of links).
For circular columns with circular links: α n = 1 α s = (1 – s/2 D0)2 For circular columns with spiral links α n = 1 α s = (1 – s/2 D0) where D0 is the diameter of the confined core (to the centre line of links)."
! A) Table NA.1 relates to BS EN 1992-1-1 incorporating Corrigendum No. 1 (January 2008). "
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M
s i i l d n a s y e r o t s f o r e b m u n e h t n s a p i 0 s n d e n r e e e h h w t i f l o ) 0 n h 4 t g + n 0 e 2 ( l e 2 = 1 q h t Q
"
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M n s i o n i t a a d n S e m i m t i o c s r e r e e v d i c n o o r U u , E a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e c i L ) A
s i i l d n a s y e r o t s f o r e b m u n e h t n s a p i 0 s n d e n r e e e h h w t i f l o " ) 0 h n 4 t + g n 0 e 2 ( l e 2 = 1 q h t Q
" . )
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"
! !
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! © BSI 2009
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M s n i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e c i L
e h t o t d e t a l e r s t n e m e r . i K u q U e r e l h t a n n o i i i t s n d o d a i t s l a e u i v g g e r 7 g n 8 6 i 6 d l i D u P b n o i t a d n e m m o c e r ) A
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© BSI 2009
" . )
8 0 0 2 y r a u n a J ( 1 . o N m u d n e g i r r o C g n i t a r o p r o c n i 1 1 2 9 9 1 N E S B o t s e t a l e r 1 . A N e l b a T ) A
!
I S B ) c ( , 6 2 : 6 0 1 1 0 n i 2 / d t e 2 h e i f h i g 0 i t d / e o 3 w n e m t 2 h h e g w b f i l ) , t o r 5 o o . " n . f s 6 . . d ) 3 a y 1 l l d u ( l 1 t a ( e o r n s h c " e o u s s e e n i e l r e s b ν f u l r s g , a y e o ] e o r v 0 p a t 2 c 5 x m e d r e 2 e / E e c t n d k o n c l n u o N n l o i e i c − t a t h s m v t p r i 1 " e d h m [ g 1 c 8 w o i e e e , c x η d e 0 e 5 V n w c , e r , e t n = 0 , e e h a g d = t h a e m i i t l r l r m ν c o o s α e n c r s o c y c o e ! U ! c r F a a l a M n s i o t n i a d a n S e m i t m i o c s r e r e e v f i d c n o k o r 8 U u 2 , E , 0 a = i n i s m , l y ! υ a l a M s n i a S i t i s r e v i n U : y p o c d e s n e c i L 3 . 2 . 6
f
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1 . A N e l b a T ) A
! © BSI 2009
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M s n i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e c i L
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© BSI 2009
8 0 0 2 y r a u n a J ( 1 . o N m u d n e g i r r o C g n i t a r o p r o c n i 1 1 2 9 9 1 N E S B o t s e t a l e r 1 . A N e l b a T ) A
!
I S B ) c ( , 6 2 : 6 0 1 1 !Tables deleted." 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M s n i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e 16 c i L
© BSI 2009
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M s n i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e c i L
!In BS EN 1992-1-1:2004, Expression (7.11) the cover, c should be taken as cnom. The use of the resulting value of sr,max in BS EN 1992-1-1:2004, Expression (7.8) will then provide an estimation of the crack width at the surface of the concrete. In some situations, such as structures cast against the ground, cnom will be significantly greater than the cover required for durability. Where there are no appearance requirements it is reasonable to determine the crack width at the cover required for durability and verify that it does not exceed the relevant maximum crack width. This may be done by multiplying the crack width determined at the surface by ( cmin,dur + ∆cdev)/cnom to give the crack width at the cover required for durability, and verifying that it is not greater than wmax. This approach assumes the crack width varies linearly with zero width at the face of the bar. "
© BSI 2009
17
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i !NOTE 4 The values of k in the table might not be appropriate when the form-work is struck at an early age or when the s construction loads exceed the design load. In these cases, the deflections may need to be calculated using advice in specialist y a literature, e.g. the Concrete Society’s report on deflecions in concrete slabs and beams and an article for the Magazine of l Concrete Research entitled Are exi sting span to depth rules conservative for flat slabs?, both of which are referenced in NA.4. a NOTE 5 When the span/depth ratio obtained from NA.3 or Expressions (7.16a) or (7.16b) is adjusted using either (310/ ) or M (500/f )( A / A ), such adjustment should be limited to a maximum value of 1.5. should be calculated under characteristic s combination of load at serviceability limit state. n NOTE 6 The absolute value of span/depth may not, in any case, exceed 40 K ." i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e 18 © BSI 2009 c i L σs
yk
s,prov
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NA.4.2 References
for conforming to building regulations in the UK
! The Building Regulations 2000 (England and Wales) [1,2], Building (Scotland) Regulations 2004 [3,4,5], and Building Regulations (Northern Ireland) 2000 [6] require that a building is constructed so that in the event of an accident the building will not suffer collapse to an extent disproportionate to the cause. Provisions of EN 1992-1-1 are not considered sufficient in some respects and details and design approaches for satisfying this requirement are included in PD 6687 as non-contradictory complimentary information."
© BSI 2009
19
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o !PD 6687-2:2008, Recommendations for the design of structures to BS EN 1992-2:2005 " i s r e V , a i ![1] GREAT BRITAIN. The Building Regulations 2000. London: The Stationery Office. s y [2] GREAT BRITAIN. The Building Regulations 2000 Approved Document A: Structure. London: The a Stationery Office, 2004. l a M [3] GREAT BRITAIN. Building (Scotland) Regulations 2004, as amended: The Stationery Office. s [4] GREAT BRITAIN. The Scottish Building Standards Technical Handbook Domestic: The Stationery n Office. i a S [5] GREAT BRITAIN. The Scottish Building Standards Technical Handbook Non-Domestic: The i Stationery Office. t i s r [6] GREAT BRITAIN. Building Regulations (Northern Ireland) 2000. Belfast: The Stationery e Office." v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e 20 © BSI 2009 c i L
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M s n i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v i n U : y p o c d e s n e c i L
I S B ) c ( , 6 2 : 6 0 1 1 0 2 / 2 0 / 3 2 f o s a t c e r r o c n o i s r e V , a i s y a l a M s n i a S i t i s r e v i n U , a i s y a l a M s n i a S i t i s r e v BSI Group i n Headquarters 389 U Chiswick High Road, : London, W4 4AL, UK y p Tel +44 (0)20 8996 9001 o Fax +44 (0)20 8996 7001 c www.bsigroup.com/ d standards e s n e c i L
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