8/10/2019 Ex 4, Durabilty and Fire Resistance

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Project

Exercise 4Job ref

Part of structure

Minimum concrete cover Cnom

Sheet no ref

1 / 6

Drawing ref.

see Ref

Calc by

KW

Date

01/11/2010

Check by Date

Ref Calculations Outut

Task

See !ote 1

"able #$

%attache&'

(! 1))$

*.*.1.$ %+'

*.*.1.$ %,'

*.*.1.$ %6'

*.*.1.$ %-'

*.*.1.$ %'

4.4.1.3

See "able

attache&

Exercise 4:

Calculate the iniu concrete co0er for the 0erification of &urability an& fire resistance

for the following eales2

a' Concrete bea/slab2 3ire resistance class2 R)4

(osure con&itions2 5C1

Suort con&itions2 sile suorte& a reinforceent &iaeter use&2 $4

b' Concrete colun2 3ire resistance class2 R1$4

(osure con&itions2 5C+mi7 4.- a reinforceent &iaeter use&2 16

- Dur a bilit

3in& for the en0ironent secifie& abo0e2

1' "he uer liit to the water/ceent ratio 7

$' "he lower liit to the ceent content 7

8n a&&ition to the abo0e re9uireents for &urability in any gi0en en0ironent are2+' goo& coaction*' a&e9uate curing,' !oo" "etailin!#

6' "he lower liit to the thickness of the co0er cin to the reinforceent

"he greater 0alue for c min satisfying the requirements for both bond and environmental

con&itions shall be use&.

c min = max {c min ,b; c min,dur + c dur,! " c dur,st " c dur,add ; 1# mm$ %4.&'

$%ere:

c min,b minimum cover due to bond requirement 7

c min,dur minimum cover due to environmental conditions 7

c dur,! additive safety element 7

c dur,st reduction of minimum cover for use of stainless steel 7

c dur,add reduction of minimum cover for use of additional (rotection 7

c dev = 14 cin7 a' $4 b' $,

c nom = c v = c min + c dev =

- &ir e res is ta n c e

iniu co0er to centreline of ain reinforceent a 7

iniu &iensions with or thickness

initial )final design initial )final design

a' Concrete slab/bea2 slab2 #;&* ) #;&* bea2 #;3* ) #;4*

b' Concrete colun2 final design bmin = 3*# and a= *mm

or

initial 7 *##mm ) no dim for a bmin = 4*# and a= *1 mm

!ote 12 anual for the &esi n of concrete buil&in structures to (uroco&e $ :(; Plus

a' b'

4.- 4.*,

$*4kg/+

+*4kg/+

a' b'

$4 16

1, $,

4 4

4 4

4 4

a' b'

+4 +,

8/10/2019 Ex 4, Durabilty and Fire Resistance

2/6

Project

Exercise 4Job ref

Part of structure

Minimum concrete cover Cnom

Sheet no ref

$ / 6

Drawing ref.

see Ref

Calc by

KW

Date

01/11/2010

Check by Date

Ref Calculations Outut

'nitial "esi!n

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8/10/2019 Ex 4, Durabilty and Fire Resistance

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Project

Exercise 4Job ref

Part of structure

Minimum concrete cover Cnom

Sheet no ref

* / 6

Drawing ref.

see Ref

Calc by

KW

Date

01/11/2010

Check by Date

Ref Calculations Outut

&inal "esi!n (or beams

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Project

Exercise 4Job ref

Part of structure

Minimum concrete cover Cnom

Sheet no ref

, / 6

Drawing ref.

see Ref

Calc by

KW

Date

01/11/2010

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Ref Calculations Outut

&inal "esi!n (or columns

!ote2 8t is goo& ractise that the any colun &iension shoul& not be less than +44.

Durabilit

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Project

Part of structure

Exercise 4

Minimum concrete cover Cnom

Job ref

Sheet no ref

6 / 6

Drawing ref.

see RefCalc by

KW

Date

01/11/2010

Check by Date

Ref Calculations Outut