API 650, 5.6.4, Calculation of Shell Thickness by the 1-Foot Method
Plant ID
Equipment Number:
Equipment Type:
A Tank Farm
ABC-1234
API 650 Storage Tank
Design
Material (Course 1):
SA 283 C
Material (Course 2, 3 & 4): SA-515 60
Corrosion Allowance (in):
Nominal Diameter (ft):
212
Height (ft):
32
Specific Gravity:
0.85
Equipment:
Date:
Oil Storage Tank 02
12th August 2014
Shell Course Height (in)
Course 1:
96
Course 2:
96
Course 3:
96
Course 4:
93
Nominal thick
0.957
0.710
0.467
0.375
Calculation of Thickness by the 1-Foot Method, inches
Reference: API 650, 11th edition, 5.6.3
The 1-foot method calculates the thicknesses required at design points 0.3 m (1 ft) above the bottom
This method shall not be used for tanks larger than 61 m (200 ft) in diameter.
The required minimum thickness of shell plates shall be the greater of the values computed by the fo
td =
2.6 D(H-1) G
+ CA
Sd
and
tt =
2.6 D(H-1)
St
where
td
bottom-course corroded shell thickness, (in.),
tt
hydrostatic test shell thickness (in.),
nominal tank diameter, in ft (see 5.6.1.1, Note 1),
design liquid level, (ft),
height from the bottom of the course under consideration to the top of the shell including
D
H
G
CA
Sd
St
angle, if any; to the bottom of any overflow that limits the tank filling height; or to any ot
specified by the Purchaser, restricted by an internal floating roof, or controlled to allow fo
wave action,
design specific gravity of the liquid to be stored, as specified by the Purchaser,
corrosion allowance, (in.), as specified by the Purchaser (see 5.3.2),
allowable stress for the design condition, (lbf/in. 2) (see 5.6.2.1), Tables 5-2a and 5-2b
allowable stress for the hydrostatic test condition, (lbf/in. 2) (see 5.6.2.2). Tables 5-2a and
Course number: 1
D=
212 ft
H=
31.75 ft
G=
0.85
CA =
0.000 in
Sd =
20000 psi
Course number: 2
D=
212 ft
H=
23.75 ft
G=
0.85
CA =
0.000 in
Sd =
21300 psi
Course number: 3
D=
212 ft
H=
15.75 ft
G=
0.85
CA =
0.000 in
Sd =
21300 psi
St =
22500 psi
St =
24000 psi
St =
24000 psi
td =
0.720 in
td =
0.500 in
td =
0.324 in
tt =
0.753 in
tt =
0.522 in
tt =
0.339 in
Nominal thickness (in):
at design points 0.3 m (1 ft) above the bottom of each shell course.
e the greater of the values computed by the following formulas:
r consideration to the top of the shell including the top
w that limits the tank filling height; or to any other level
n internal floating roof, or controlled to allow for seismic
bf/in. 2) (see 5.6.2.1), Tables 5-2a and 5-2b
ndition, (lbf/in. 2) (see 5.6.2.2). Tables 5-2a and 5-2b
Course number: 4
D=
212 ft
H=
7.75 ft
G=
0.85
CA =
0.000 in
Sd =
21300 psi
St =
24000 psi
td =
0.148 in
tt =
0.155 in
See Appendix K tab for API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Me
ion of Shell Thickness by the Variable-Design-Point Method
API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Method
Plant ID
Equipment Number:
Equipment Type:
ABC-1234
API 650 Storage Tank
Equipment:
Date:
A BIG TANK
Oil Storage Tank #280
19th August 2014
Introduction
The following calculation of tank shell thickness by the Variable-Design-Point Method is based
650, edition 11, section 5.6.4, using the methods described in Appendix K, for tanks with diam
greater than 200 ft, to establish tmin values for corrosion monitoring purposes. The information
to perfom this calculation includes, the original specified nominal thickness of the bottom she
the specific gravity of the tank contents, the height, corrosion allowance and plate specificati
course (including the product design stress, Sd and the hydrostatic test stress, St).
Summary
Course
1
2
3
4
5
tmin
0.962 in
0.782 in
0.531 in
0.423 in
0.182 in
Description
Bottom course
Second course
Third course
Fourth course
Fifth course
API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Method
Plant ID
Equipment Number:
Equipment Type:
ABC-1234
API 650 Storage Tank
Equipment:
Date:
A BIG TANK
Oil Storage Tank #280
19th August 2014
Design
Diameter (D)
Height (H)
Specific Gravity (G)
Specified nominal thickness of
bottom shell course:
280 ft
40 ft
0.85
Course
Course
Height ft.
Course Height
(h) in.
H
ft.
CA
in.
Material
Sd
psi
1
2
3
4
5
8
8
8
8
8
96
96
96
96
96
40
32
24
16
8
0.125
0.125
0.0625
0
0
A573-70
A573-70
A573-70
A36
A36
28000
28000
28000
23200
23200
Calculation for BOTTOM COURSE (COURSE 1) shell thickness, inches
Reference: API 650, 11th edition, 5.6.4
The required shell thickness for each course shall be the greater of the design shell thickness plus a
allowance or the hydrostatic test shell thickness, but the total shell thickness shall not be less than
thickness required by 5.6.1.1, 5.6.1.3, and 5.6.1.4.
To calculate the bottom-course thicknesses, preliminary values tpd and tpt for the design and hydrost
conditons shall first be calculated from the formulas in 5.6.3.2.
Design Condition
tpd =
2.6 D(H-1) G + CA
Sd
=
t1d =
1.06 -
0.463D
H
0.987 in
HG
Sd
2.6HDG
Sd
+ CA =
0.962 in
t1d need not be greater than tpd
t1d = minimum of above thicknesses =
0.962 in
Hydrostatic Test Condition
tpt =
2.6 D(H-1)
=
St
t1t =
1.06 -
0.463D
H
0.946 in
H
St
2.6HD
St
=
0.914 in
t1t need not be greater than tpt
t1t = minimum of above thicknesses =
0.914 in
tmin = minimum nominal thickness required
tmin =
0.962 in
API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Method
Plant ID
Equipment Number:
Equipment Type:
ABC-1234
API 650 Storage Tank
Equipment:
Date:
A BIG TANK
Oil Storage Tank #280
19th August 2014
Conditions for use of the Variable-Design-Point Method
Reference: API 650, 11th edition, 5.6.4.1
Design by the variable-design-point method gives shell thicknesses at design points that result in th
stresses
beinghas
relatively
close tospecified
the actual circumferential shell stresses. This method may only be
the
Purchaser
not specified
that the 1-foot method be used and when the following is true:
L ≤2
H
where
L
D
t
H
(6 Dt)0.5 , (in),
tank diameter, (ft),
bottom-course corroded shell thickness, (in.),
maximum design liquid level (see 5.6.3.2), (ft).
L = 40.206
D = 280
t=
0.962
H = 40.0
L/H = 1.01
in
ft
in
ft
Is L/H ≤ 2?
YES
The Variable-Design-Point Method can be used
Calculation for SECOND COURSE (COURSE 2) shell thickness, inches
Reference: API 650, 11th edition, 5.6.4.5
To calculate the second-course thicknesses for both the design condition and the hydrostatic test co
value of the following ratio shall be calculated for the bottom course:
h1
(rt1)0.5
where
h1
r
t1
height of the bottom shell course, (in.),
nominal tank radius, (in.),
calculated corroded thickness of the bottom shell course, (in.), used to calculate t2 (de
calculated hydrostatic thickness of the bottom shell course shall be used to calculate t
test).
h1 =
r=
96
1680
in
in
t1 =
0.962
in
h1/(rt1)0.5 =
2.388 ratio
API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Method
Plant ID
Equipment Number:
Equipment Type:
ABC-1234
API 650 Storage Tank
Equipment:
Date:
A BIG TANK
Oil Storage Tank #280
19th August 2014
Calculation for SECOND COURSE (COURSE 2) shell thickness, inches, contiuned…
If the value of the ratio is less than or equal to 1.375: t2 = t1
If the value of the ratio is greater than or equal to 2.625: t2 = t2a
If the value of the ratio is greater than 1.375 but less than 2.625,:
t2 =
t2a + (t1 - t2a) 2.1 -
h1
1.25 (rt1)0.5
where
t2 =
minimum design thickness of the second shell course, (in.),
t2a =
corroded thickness of the second shell course, (in.), as calculated for an upper shell co
described in 5.6.4.6 to 5.6.4.8. In calculating second shell course thickness (t2) for desi
hydrostatic test case, applicable values of t2a and t1 shall be used.
is ratio≤ 1.375?
NO
t2 =
N/A in
is ratio≥ 2.625?
NO
t2 =
N/A in
is ratio˃ 1.375 & ˂ 2.625
YES
t2 =
0.657 in
Design Condition
h1 =
96 in
r=
1680 in
t1d =
1.000 in
0.125 in
CA =
t1 =
h1/(rt1)
0.875 in
0.5
=
2.388 ratio
t2a =
0.634 in
t2 =
0.657 in
t2d = t2 + CA =
0.782 in
API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Method
Plant ID
Equipment Number:
Equipment Type:
ABC-1234
API 650 Storage Tank
Equipment:
Date:
A BIG TANK
Oil Storage Tank #280
19th August 2014
Calculation for SECOND COURSE (COURSE 2) shell thickness, inches, contiuned…
Hydrotest Test Condition
h1 =
96 in
r=
1680 in
t1t =
1.000 in
t1 =
1.000 in
t2a =
0.699 in
t2 =
0.767 in
t2t =
0.767 in
tmin = greater of t2d or t2t =
0.782 in
tmin =
0.782 in
Calculation for SECOND COURSE (COURSE 2), as upper shell course, shell thickness, inch
Reference: API 650, 11th edition, 5.6.4.6
To calculate the upper-course thicknesses for both the design condition and the hydrostatic test con
preliminary value tu for the upper-course corroded thickness shall be calculated using the formulas
then the distance x of the variable design point from the bottom of the course shall be calculated us
value obtained from the following:
x1 = 0.61 (rtu)0.5 + 3.84 CH
x2 = 12 CH
x3 = 1.22 (rtu)0.5
where
tu =
corroded thickness of the upper course at the girth joint, (in.),
C=
[K0.5 (K – 1)]/(1 + K1.5),
K=
tL / tu,
tL =
corroded thickness of the lower course at the girth joint, (in.),
this is the nominal specified thickness of the bottom shell course less the corrosion allo
(this value will be ≥ the bottom course (course 1), tmin).
H=
design liquid level (see 5.6.3.2), (ft).
(height from the bottom of the course under condideration to the top of the shell).
r=
tank radius, (in).
API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Method
Plant ID
Equipment Number:
Equipment Type:
ABC-1234
API 650 Storage Tank
Equipment:
Date:
A BIG TANK
Oil Storage Tank #280
19th August 2014
Calculation for SECOND COURSE (COURSE 2), as upper shell course, shell thickness, inch
nominal thickness of bottom shell course =
tL =
1.000 in
0.875 in
Design condition
tL =
0.914 in
Hydrotest condition
H=
32 ft
r=
1680 in
Design Condition
Trials
with td - CA =
2.6 D(H-1) G
=
Sd
starting
tu =
1
2
3
4
2.6D H - x G
12
Sd
0.6851 in
tu
in.
K
C
x1
in.
x2
in.
x3
in.
0.685
0.640
0.634
0.634
1.277
1.367
1.381
1.380
0.128
0.165
0.171
0.170
36.449
40.298
40.885
40.851
49.231
63.420
65.575
65.450
41.390
40.006
39.801
39.813
td - CA =
0.634 in
td =
0.759 in
Hydrotest Condition
Trials
2.6D H - x
12
St
with tt =
2.6 D(H-1)
St
tu =
starting
=
0.752 in
API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Method
Plant ID
Equipment Number:
Equipment Type:
ABC-1234
API 650 Storage Tank
Equipment:
Date:
A BIG TANK
Oil Storage Tank #280
19th August 2014
Calculation for SECOND COURSE (COURSE 2), as upper shell course, shell thickness, inch
1
2
3
4
tu
in.
K
C
x1
in.
x2
in.
x3
in.
0.752
0.708
0.701
0.699
1.215
1.292
1.305
1.307
0.101
0.134
0.140
0.141
34.137
37.548
38.098
38.188
38.909
51.616
53.658
53.989
43.371
42.061
41.855
41.822
tt =
0.699 in
Calculation for THIRD COURSE (COURSE 3), shell thickness, inches
x1 = 0.61 (rtu)0.5 + 3.84 CH
x2 = 12 CH
x3 = 1.22 (rtu)0.5
where
tu =
corroded thickness of the upper course at the girth joint, (in.),
C=
K=
[K0.5 (K – 1)]/(1 + K1.5),
tL / tu,
tL =
td of lower shell course less CA
Design condition
tL =
calculated hydrostatic thickness of lower shell course
Hydrostatic condition
H=
design liquid level (see 5.6.3.2), (ft).
(height from the bottom of the course under condideration to the top of the shell).
r=
tank radius, (in).
tL =
0.657 in
Design condition
tL =
0.767 in
Hydrotest condition
H=
24 ft
r=
1680 in
Design Condition
Trials
2.6D H - x G
12
Sd
with td - CA =
2.6 D(H-1) G
tu =
=
Sd
starting
0.5083 in
API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Method
Plant ID
Equipment Number:
Equipment Type:
ABC-1234
API 650 Storage Tank
Equipment:
Date:
A BIG TANK
Oil Storage Tank #280
19th August 2014
Calculation for THIRD COURSE (COURSE 3), shell thickness, inches
1
2
3
4
tu
in.
K
C
x1
in.
x2
in.
x3
in.
0.508
0.475
0.469
0.469
1.293
1.385
1.400
1.403
0.135
0.172
0.178
0.179
30.256
33.089
33.550
33.626
38.846
49.572
51.310
51.595
35.651
34.452
34.262
34.231
td - CA =
0.468 in
td =
0.531 in
Hydrotest Condition
Trials
2.6D H - x
12
St
with tt =
starting
rtu =
1
2.6 D(H-1)
St
=
0.558 in
tu
in.
K
C
x1
in.
x2
in.
x3
in.
0.558
1.375
0.168
34.186
48.461
37.358
2
3
4
0.513
0.510
0.510
1.495
1.505
1.504
0.214
0.218
0.217
37.637
37.905
37.886
61.641
62.659
62.586
tt =
0.510 in
tmin =
0.531 in
35.825
35.709
35.717
API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Method
Plant ID
Equipment Number:
Equipment Type:
ABC-1234
API 650 Storage Tank
Equipment:
Date:
A BIG TANK
Oil Storage Tank #280
19th August 2014
Calculation for FOURTH COURSE (COURSE 4), shell thickness, inches
x1 = 0.61 (rtu)0.5 + 3.84 CH
x2 = 12 CH
x3 = 1.22 (rtu)0.5
where
tu =
corroded thickness of the upper course at the girth joint, (in.),
C=
K=
[K0.5 (K – 1)]/(1 + K1.5),
tL / tu,
tL =
td of lower shell course less CA
Design condition
tL =
calculated hydrostatic thickness of lower shell course
Hydrostatic condition
H=
design liquid level (see 5.6.3.2), (ft).
(height from the bottom of the course under condideration to the top of the shell).
r=
tank radius, (in).
tL =
0.468 in
Design condition
tL =
0.510 in
Hydrotest condition
H=
16 ft
r=
1680 in
Design Condition
Trials
2.6D H - x G
12
Sd
with td - CA =
2.6 D(H-1) G
tu =
Sd
starting
1
2
3
4
=
0.400 in
tu
in.
K
C
x1
in.
x2
in.
x3
in.
0.400
0.392
0.387
0.385
1.171
1.195
1.210
1.218
0.082
0.093
0.099
0.103
20.827
21.339
21.640
21.818
15.665
17.769
19.001
19.732
31.629
31.306
31.118
31.008
td - CA =
0.383 in
td =
0.383 in
API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Method
Plant ID
Equipment Number:
Equipment Type:
ABC-1234
API 650 Storage Tank
Equipment:
Date:
A BIG TANK
Oil Storage Tank #280
19th August 2014
Calculation for fourth course (course 4), shell thickness, inches
Hydrotest Condition
Trials
with
2.6D H - x
12
St
tt =
2.6 D(H-1)
St
starting
tu =
1
2
3
4
=
0.439 in
tu
in.
K
C
x1
in.
x2
in.
x3
in.
0.439
0.431
0.427
0.425
1.1633
1.1830
1.1946
1.2008
0.078
0.087
0.092
0.095
21.357
21.767
21.979
22.135
14.999
16.713
17.624
18.245
33.115
32.838
32.679
32.594
tt =
0.423 in
tmin =
0.423 in
Calculation for FIFTH COURSE (COURSE 5), shell thickness, inches
x1 = 0.61 (rtu)0.5 + 3.84 CH
x2 = 12 CH
x3 = 1.22 (rtu)0.5
where
tu =
corroded thickness of the upper course at the girth joint, (in.),
C=
K=
[K0.5 (K – 1)]/(1 + K1.5),
tL / tu,
tL =
td of lower shell course less CA
Design condition
tL =
calculated hydrostatic thickness of lower shell course
Hydrostatic condition
H=
design liquid level (see 5.6.3.2), (ft).
(height from the bottom of the course under condideration to the top of the shell).
r=
tank radius, (in).
tL =
0.383 in
Design condition
tL =
0.423 in
Hydrotest condition
H=
8 ft
r=
1680 in
API 650, 5.6.4, Calculation of Shell Thickness by the Variable-Design-Point Method
Plant ID
Equipment Number:
Equipment Type:
ABC-1234
API 650 Storage Tank
Equipment:
Date:
A BIG TANK
Oil Storage Tank #280
19th August 2014
Calculation for FIFTH COURSE (COURSE 5), shell thickness, inches
Design Condition
Trials
with td - CA =
tu =
2.6 D(H-1) G
=
Sd
starting
1
2
3
4
2.6D H - x G
12
Sd
0.187 in
tu
in.
K
C
x1
in.
x2
in.
x3
in.
0.187
0.165
0.168
0.168
2.051
2.316
2.277
2.282
0.382
0.443
0.434
0.435
22.546
23.762
23.596
23.619
36.695
42.486
41.696
41.803
21.607
20.334
20.507
20.484
td - CA =
0.168 in
td =
0.168 in
Hydrotest Condition
Trials
with
2.6D H - x
12
St
tt =
2.6 D(H-1)
St
tu =
starting
1
2
3
4
=
0.205 in
tu
in.
K
C
x1
in.
x2
in.
x3
in.
0.205
0.179
0.182
0.182
2.0685
2.3679
2.3212
2.3278
0.387
0.453
0.444
0.445
23.188
24.497
24.308
24.335
37.114
43.516
42.596
42.728
22.622
21.143
21.355
21.325
tt =
0.182 in
tmin =
0.182 in
s by the Variable-Design-Point Method
Page 1
A BIG TANK FARM
Oil Storage Tank #280-01
19th August 2014
ness by the Variable-Design-Point Method is based on API
thods described in Appendix K, for tanks with diameter
for corrosion monitoring purposes. The information required
inal specified nominal thickness of the bottom shell course,
e height, corrosion allowance and plate specification of each
Sd and the hydrostatic test stress, St).
s by the Variable-Design-Point Method
Page 2
A BIG TANK FARM
Oil Storage Tank #280-01
19th August 2014
1.000 in
St
psi
30000
30000
30000
24900
24900
be the greater of the design shell thickness plus any corrosion
but the total shell thickness shall not be less than the shell
minary values tpd and tpt for the design and hydrostatic test
API 650 reference
5.6.3.2.
5.6.4.4.
5.6.3.2.
5.6.4.4.
the greater of td or tt
controlled by t1d
s by the Variable-Design-Point Method
Page 3
A BIG TANK FARM
Oil Storage Tank #280-01
19th August 2014
shell thicknesses at design points that result in the calculated
mferential shell stresses. This method may only be used when
5.6.4.1
th the design condition and the hydrostatic test condition, the
5.6.4.5
bottom shell course, (in.), used to calculate t2 (design). The
he bottom shell course shall be used to calculate t2 (hydrostatic
5.6.4.5
s by the Variable-Design-Point Method
Page 4
A BIG TANK FARM
Oil Storage Tank #280-01
19th August 2014
5.6.4.5
ll course, (in.), as calculated for an upper shell course as
culating second shell course thickness (t2) for design case and
5.6.4.5
Page 5
A BIG TANK FARM
Oil Storage Tank #280-01
19th August 2014
, as upper shell course, shell thickness, inches
the design condition and the hydrostatic test condition, a
d thickness shall be calculated using the formulas in 5.6.3.2, and
om the bottom of the course shall be calculated using the lowest
s of the bottom shell course less the corrosion allowance.
e under condideration to the top of the shell).
Page 6
A BIG TANK FARM
Oil Storage Tank #280-01
19th August 2014
, as upper shell course, shell thickness, inches
Design condition
Hydrotest condition
5.6.4.7
x
in.
td-CA
in.
36.449
40.006
39.801
39.813
0.640
0.634
0.634
0.634
5.6.4.7
Page 7
A BIG TANK FARM
Oil Storage Tank #280-01
19th August 2014
, as upper shell course, shell thickness, inches
x
in.
tt
in.
34.137
37.548
38.098
38.188
0.708
0.701
0.699
0.699
Design condition
Hydrostatic condition
e under condideration to the top of the shell).
Design condition
Hydrotest condition
5.6.4.7
Page 8
A BIG TANK FARM
Oil Storage Tank #280-01
19th August 2014
x
in.
td-CA
in.
30.256
33.089
33.550
33.626
0.475
0.469
0.469
0.468
5.6.4.7
x
in.
tt
in.
34.186
0.513
35.825
35.709
35.717
0.510
0.510
0.510
Page 9
A BIG TANK FARM
Oil Storage Tank #280-01
19th August 2014
Design condition
Hydrostatic condition
e under condideration to the top of the shell).
Design condition
Hydrotest condition
5.6.4.7
x
in.
td-CA
in.
15.665
17.769
19.001
19.732
0.392
0.387
0.385
0.383
Page 10
A BIG TANK FARM
Oil Storage Tank #280-01
19th August 2014
5.6.4.7
x
in.
tt
in.
14.999
16.713
17.624
18.245
0.431
0.427
0.425
0.423
Design condition
Hydrostatic condition
e under condideration to the top of the shell).
Design condition
Hydrotest condition
Page 11
A BIG TANK FARM
Oil Storage Tank #280-01
19th August 2014
5.6.4.7
x
in.
td-CA
in.
21.607
20.334
20.507
20.484
0.165
0.168
0.168
0.168
5.6.4.7
x
in.
tt
in.
22.622
21.143
21.355
21.325
0.179
0.182
0.182
0.182
Steel plates size & weight - thickness range
Nominal Size Thickness
(inches)
0.1875
3/16
0.2500
1/4
0.3125
5/16
0.3750
3/8
0.4375
7/16
0.5000
1/2
0.5625
9/16
0.6250
5/8
0.6875
11/16
0.7500
3/4
0.8125
13/16
0.8750
7/8
1
1.0000
1 1/8
1.125
1 1/4
1.25
1 3/8
1.375
1 1/2
1.5
1 5/8
1.625
1 3/4
1.75
1 7/8
1.875
2
2
2 1/8
2.125
2 1/4
2.25
2 1/2
2.5
2 3/4
2.75
3
3
3 1/4
3.25
3 1/2
3.5
3 3/4
3.75
4
4
4 1/4
4.25
4 1/2
4.5
5
5
5 1/2
5.5
6
6
6 1/2
6.5
7
7
7 1/2
7.5
8
8
9
9
10
10
Weight
(lb/ft2)
7.65
10.20
12.75
15.30
17.85
20.40
22.95
25.50
28.05
30.60
33.15
35.70
40.80
45.90
51.00
56.10
61.20
66.30
71.40
76.50
81.60
86.70
91.80
102.00
112.20
122.40
132.60
142.80
153.00
163.20
173.40
183.60
204.00
224.40
244.80
265.20
285.60
306.00
326.40
367.20
408.00