Leg Design 2x4p5t

Project :

PEDC

Design Calculations for : Calc by N M Patel Checked by

Leg Design For Reactor

Job No. Date Date

QTY. Design Calculation No:

DATA Sr

Parameter

Nom

Unit

Value

1 Diameter

D

M

5

2 Height of Reactor

H

M

6

3 Height of Reactor from Foundation

H1

M

8

4 Length of leg

L

M

4

5 Bolt circle Diameter

Bc

M

5.5

6 Clearance from Vessel bottom to foundation

lc

M

1

7 Height of Gusset Plate

HG

mm

400

8 Distance Between Gusset Plate

a

mm

250

9 Length of Base plate

B

mm

350

10 Width of Base plate

A

mm

400

11 Distance from BCD to Reactor

C

mm

250.0

12 Nos Of Legs

nl

6

13 Specific Gravity

G

1.1

14 Total Weight of Tank

W

Kg

100000

15 Wind Velocity

V

m/sec

44

Page 1 of 4

22/11/10

3 FZD- 01

1 Wind Pressure ,Kg/m2

PW =0 . 06 V 2 Pw=

116.16

Kg/M2

2 Wind Load Where

PWL=KP W DH 1 PwL =

K=Shape factor= 3252.48

0.7

for Cylinder

Kg

3 Load Per Lug, P

P=

4 PWL ( H 1 −LC ) ΣW + nl B C ni P=

19426.3

Kg

4 Base plate Design

Permissible Stresses for Structural steel

Assume Thickness of Base plate Design T1=

25

mm

Leg MOC

IS :800

Fc =

1233

Kg/cm2

Ft =

1400

Kg/cm2

22.2

Kg/cm2

Induced stresses in Base plate

f bp =0 .7 P av

2

( )( B T1

fbp =

a4 a4 +B4

)

629.1

Where Pav = P/Ba

Kg/cm2 fbp

Hence

<

fcAllowable

16

mm

<

fcAllowable

,Design is Safe

5 Gusset Plate Design Assume Thickness of Gusset Plate,T2 = Induced stresses in Gusset Plate

f Gp =

3 PC T 2 H 2 COS θ fgp =

804.6 Hence

Kg/cm2 fgp

Page 2 of 4

,Design is Safe

5 Column Design(As per Brownell & Young) Type of Section

ISMC 200 Box

Allowable Stress,Kg/cm2 C/s Area ,Acolumn =

f

ca =

1265 r 1+

s

2

18000

56.42

cm2

IXX,

=

3638.6

cm4

ZXX

=

363.8

cm3

8

cm

RXX = fca=

1222.6

Kg/cm2

Where rs=Slenderness Ratio

Permissible rs=

rs= le/Rxx = l/2Rxx

25.00

120

is Safe

Induced stresses in Column

f c=

P A COLUMN

+

fc =

PWL L 2 nl Z XX 642.3

Kg/cm2

Hence

fc

<

fca

T3 =

16

mm

,Design is Safe

6 Bearing Plate Design: Assume Bearing Plate thickness, Induced stresses in Bearing Plate

L1 B1

( )( )

3 P f bearing = 4 T 2 3

fbearing =

66.40 Hence

Width of Bearing Plate,B1=

300

mm

Length of Bearing Plate,L1 =

350

mm

Kg/cm2 fbearing

<

fcAllowable

Page 3 of 4

,Design is Safe

Page 4 of 4