Chimney Calculation Sheet

CHIMNEY DESIGN CALCULATION CODE

: I.S. 6533 CUSTOMER : CHIMNEY DIAMETER-TOP D1(IN cm) CHIMNEY DIA BOTTOM BD (IN cm) CHIMNEY HEIGHT TOTAL H( IN cm) CORROSION ALLOWANCE ALLOWABLE BEARING ON FOUNDATION Ff( IN KG/cm2) ALLOWABLE BENDING STRESS-BEARING PLATE Fbp( IN KG/cm2)

SEGMENT I SEGMENT II SEGMENT III SEGMENT IV SEGMENT V

DIA D1 ( IN cm) 132 132 132 132 176

PAGE

DIA D1' (IN cm) 132 132 132 176 220

D AVG (IN cm) 132 132 132 154 198

SECTIONAL HEIGHT (IN cm) 960 960 920 880 880

SHELL THICKNESS (IN MM) ( IN cm) 10 1.00 12 1.20 16 1.60 20 2.00 22 2.20

DESIGN OF SEGMENT I DESIGN WIND SPEED (Vz)= WHERE

Vb X K1 X K2 X K3 K1= K2= K3= VB=

------

IS 875(3)-

PROBABILITY FACTOR= TERRAIN FACTOR= TOPOGRAPHY FACTOR = BASIC WIND SPEED= Vz =

1987

1 1.12 1 44 m/s

49.28 METRES/SEC

DESIGN WIND PRESSURE PZ = PZ = PZ =

0.6xVzxVz

WIND FORCE

=

Cf x Ae x Pz x 1.1

Cf= Ae= Ae=

FORCE COEFFICIENT EFFECTIVE AREA =

1.1 =

10% INCREASED TO TAKE CARE OF WIND PRESSURE ON CAGE AND LADDER

FL

WHERE

WIND FORCE

FL

1457.11104 N/M2 0.014862533 Kg/cm2

=

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FIRST CARBON TECHNOLOGIES PVT LTD,INDIA : 132 : 220 : 4600 : MM 3 : 20 : 1650

2486.061774 Kg

NOTE: I N/M2

CONVERSION FACTOR = 0.0000102 KG /cm2

(Pz= WIND PRESSURE) 1.2 AVG DIA x HEIGHT 126720 cm2

98039.2157

PAGE A)

BENDING MOMENT Mx =

FL(H-Y)/2

Mx= B) MODULUS OF SECTION Z=

where,

H= Y=

HEIGHT OF CHIMNEY in cm SECTION HEIGHT in cm

1193309.652 KG cm

.77T x D x D

WHERE

T=

SHELL THICKNESS W/O CORROSION ALLOWANCE(in cm) =

BOTTOM DIA(D) ( in cm)=

Z=

132

9391.536 cm^3

C) ACTUAL BENDING STRESS FB= = = =

Mx/Z 127.0622454 12457082.88 12.45708288

KG/cm^2 KG/cm^2 Pa Mpa

D) ACTUAL COMPRESSION STRESS Fc=

G/A

WHERE G=

DEAD WEIGHT OF SEGMENT

G=

A=

3099.85824 KGS

AREA OF SECTION BOTTOM W/O CORROSION ALLOWANCE

A=

FC = = =

10.74111631 KG/cm2 1053050.619 Pa 1.053050619 Mpa

E) TOTAL COMBINED STRESS

288.5974 cm2

D1= D2=

132 cm 130 cm

0.7

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PAGE Sc = = REFER TABLE 3 he/D< 20

Fb+ Fc 13.5101335 Mpa : I.S. 6533

D/t