Presentation 2 made for NAME 338 project design. Institution:Bangladesh University of Engineering and Tech,

1. Supervised by
Dr. MD. Sadiqul Baree
Professor
Department of Naval Architecture
& Marine Engineering , BUET
Designed by
Mohammad Kifayath Chowdhury
Student No: 1112023
Mahmudur Rahman
Student No: 1112049

2. 

3. Ship Type : Oil Tanker
DWT : 2900 tonnes
Route : Chittagong to Dhaka
Speed : 10 knots
OBJECTIVE

5. Principal Particulars
Length overall( LOA ): 76.2 m
Length between perpendiculars ( LBP ): 73.152 m
Moulded Breadth ( B ): 15 m
Moulded Depth ( D ): 5.94 m
Moulded Draught ( H ) : 3.96 m
Block co-efficient ( CB ) : 0.83
Frame spacing a=0.6m
Web frame spacing 𝑒 = 2.4𝑚
Material factor 𝑘 = .72 (sec 2 A.2 pg. 2-1)

6. General Arrangement
Drawing

8. Lines Plan Drawing

10. Scantling Calculation
&
Drawing

11. Scantling Calculation
Reference Rulebook: DNVGL
Framing System: Longitudinal Framing
 Deck Members
 Deck Girder:
Section Modulus, W = c × e × l2 × P × k ( sec 10 B2.2.1)
= 0.75 × 2.4× 2.42 × 25.93 × .72
=193.566 cm3
Dimension‫׃‬ T- 180x100x8
 Deck Web:
Section Modulus=c* (m2
k1-m2
a)*a*l2*p*k (sec 10 B 1.1)
=.75*(1-0)*.6*22*25.93*1 (mk1,ma in pg. 12-3)
= 46.674 cm3
Dimension ‫׃‬T 80x60x8

12.  Deck longitudinal
Section Modulus=c* (m2
k1-m2
a)*a*l2*p*k (sec 10 B 1.1)
=.65*(1-0)*.6*2.42*25.93*.72 (mk1,ma in pg. 12-3)
=41.94cm3
Dimension =L-80x60x7
 Strength deck plating:
tmin= (4.5+.05L) (Sec 7 B 6.1)
= (4.5+.05x73.152)x mm
=6.92 mm
Taking thickness, tD = 7mm

13. Side Members
Side shell plate thickness
TS1 = 1.9 ×nf × a × P𝑠 ∗ 𝑘 +tk= 6.76mm (Sec-6, C.1)
Minimum Thickness = T+Cb/2 = 7.473 mm
Selected: 8 mm
Web frame ‫׃‬
Section modulus, W = 0.55 × e × l2 × P × nc × k (Ref. Sec9,B-5.3.1
pg.9-5)
= 0.55 × 2.4 × 4.942 ×27.69× 1 × .72
= 642.219 cm3
Dimension ‫׃‬T 360x190x7

14. Side Stringers
Section modulus, W = 0.55 × e × l2 × P × nc × k (Sec9,B-5.3.1 pg.9-5)
= 0.55 × 2.4 × 2.42 ×39.68× 1 × .72
= 217.22 cm3
Dimension ‫׃‬T 200x140x6
SIDE LONGITUDINALS
Section Modulus Wl=83/σpr((m2
k1-m2
a)*a*l2* Ps (Sec 9 C3.1)
=(83/152.73)x1x.6x2.42x42.959
=80.68 cm3
Dimension ‫׃‬L 120x60x8
WEB PLATE THICKNESS:
t = 9 mm
According to table 15 (Ref. .M.M. Zulfikar (2008).The Inland Shipping Laws &
Rules,Pg144)

15. Shear strake:
t= 0.5(tD +tS ) (Sec 6 C.2 pg.6-5)
=0.5( 7+8) = 7.5 mm
Taking t = 8 mm
Width = 800+5L mm
=1165.76 mm
Bracket thickness:
The thickness of brackets is not to be less
than:
t = c × + tk (sec 3 B 3.5.2.2)
= 1.2 × + 1.5
=9.27 mm
≈10 mm

16. Bottom Members
Bottom Plate Thickness
Corrosion addition tk = 1.5 mm, for thickness ≤10 mm (Sec-3, G-1 pg.3-
30)
tB1= 1.9 X nf X a X ( + tk )= 1.9x0.83x.6x +1.5=7.714mm
tB2 =1.21 x a x + tK =1.21x.6x +1.5 =6.268 mm
Minimum bottom plate thickness = c1 +tk≈ 8.75 mm
Accepted Bottom plate thickness 9 mm.
Bilge thickness
Bilge thickness = Bottom plate thickness = 9 mm
The width of bilge plate keel is not to be less than :
B= 800+5L (mm) (Sec-6, pg.6-4)
=800+5 × 73.152= 1165.76mm=1.165 m

17. Center Girder:
Depth, h = 350 + 45×B (Sec-8,
C- 2.2.1 pg. 8-4)
= 350 + (45×1)
= 1025mm
Double bottom depth=1000 mm
Thickness, t = ( + 1) × for h≤1200 mm (Sec-8,C-
2.2.2)
= ( + 1) ×
=9.78 mm
≈ 10 mm
Face plate width ≈ 10×10=100mm
Dimension‫׃‬ T- 1000× 100× 10
(Ref. Zulfikar.M.M. (2008).The Inland Shipping Laws & Rules, P-170)

18. Flat Keel Plate
The thickness of flat plate keel should not be less than
tFK = tB+2.0
(Sec-6, B 4.1 pg.6-4)
=9+2.0
=11 mm
So we take the thickness of our flat plate keel as tFK=11 mm.
The width of flat plate keel is not to be less than :
B= 800+5L (mm) (Sec-6, B 4.1 pg.6-4)
=800+5 × 73.152= 1165.76mm=1.165 m
Inner Bottom Thickness :
t= 1.1 a (p k) 0.5 + tk
(Sec-8, C.4.1)
=1.1 *0.6* (59.917*.72)0.5 + 1.5
=5.83 mm ≈ 6 mm
Bottom Side Girder:
t= * h2 / (120* ha ) (Sec-8, C.3.2pg. 8-5)
=10002/1000x120x mm
=7.07 mm
Height of double bottom=1000 mm
So. Dimension= T 1000x100x8

19. Bottom longitudinals
Wl=83/σpr((m2
k1-m2
a)*a*l2*p
So,Putting values, Wl=82.8 cm3
Dimension ‫׃‬L 120x60x8
Floor plate:
The thickness of the plate floor tpf = tm - 2.0√𝑘 (Sec 8 C 5.2.1 pg. 8-6)
=10 – 2.0 .72
= 8.3 mm
Taken thickness 9 mm.
Inner Bottom Longitudinal
Wl=83/σpr((m2
k1-m2
a)*a*l2*p (Sec-4,B.5 pg. 4-5)
σpr=150/k=208.33
a=.6
Putting values, Wl=82.8 cm3
Dimension ‫׃‬ L 120x60x8

20. Scantling Summary

21. Dimension Thickness
Deck girder T 180x100x8 Strength deck plating: 7 mm
Deck web T 80x60x8 Side shell plate thickness 8 mm
Web plate thickness 9 mm
Deck longitudinals L 80x60x7 Shear strake 8 mm
Side stringer T 200x140x6 Bracket thickness 10 mm
Web frame T 360x190x7 Center Girder 10 mm
Side longitudinals L- 120x60x8 Bottom plate 9 mm
Center girder T- 1000× 100× 10 Flat Keel Plate 11 mm
Bottom Side girder T 1000x100x8 Inner Bottom Thickness 6 mm
Bottom longitudinal L- 120x60x8 Floor plate 9 mm
Bulkhead stiffener L- 40x20x6 Bilge plate thickness 9 mm
Superstrtc. Deck girder T 170x90x6 Collision Bulkhead plating 6 mm
Superstrtc. Side stringer T 120x60x8 Other Bulkhead plating 5 mm
Inner bottom longitudinal L- 120x60x8
Longitudinal Bulkhead
Plating 7 mm

22. Midship Section Drawing

24. Longitudinal Construction
Drawing

28. Shell Expansion Drawing

30. Type Number Dimension
Keel Plate 12 K1= 5000x800x11
K2-K11=6000x800x11
K12=5400x800x11
Bottom Plate 24 B1-B11,B13-B23=6000x2000x9
B12=1460x2000x9
B24=4560x2000x9
Bilge Plate 13 BL1-BL11=6000x2000x9
BL12=4660x2000x9
BL13=4680x2000x9
Side Shell 36 S1-S12=6000x2000x8
S14-S25,S28,S30=6000x2000x8
S13=5640x2000x8
S26=4250x2000x8
S27=2200x2000x8
S29=5000x2000x8
S31=6000x1000x8
S32=5000X1000X8
S33=3600X1000X8
S34=3100X2000X8
S35=5900X2000X8
Shear Strake 13 SS2-SS12=6000X1200X8
SS1=4000X1200X8
SS13=4000X1200X8
SS14=4280X1200X8
Plating:

31. Detailed LightWeight Calculation

32. NAME OF ITEMS WEIGHT OF ITEMS VCG about KEEL LCG about AMIDSHIP MOMENT about AMIDSHIPQUANTITY OF ITEMS MOMENT aboutt KEEL
PARALLEL MIDDLE BODY 59.63 0.000512182
Deck Beam 20 3.141256 5.94 18.65906064 2.4 7.5390144
Deck Girder 4 3.35991392 5.94 19.95788868 2.4 8.063793408
Deck Longitudinal 12 7.19103528 5.94 42.71474956 2.4 17.25848467
Side Stringer 4 3.24723388 2.587 8.400594048 2.4 7.793361312
Side Longitudinal 18 7.1449389 2.587 18.48395693 2.4 17.14785336
Centre Girder 1 5.634002 0.5 2.817001 2.4 13.5216048
Side girder 4 12.292368 0.59 7.25249712 2.4 29.5016832
Bottom Longitudinal 14 5.90033664 0.06 0.354020198 2.4 14.16080794
Inner Bottom Longitudimal 12 5.90033664 0.97 5.723326541 2.4 14.16080794
Transverse Bulkhead 6 24.938508 2.97 74.06736876 2.3 57.3585684
Longitudinal Bulkhead 1 22.2286988 2.97 66.01923544 2.4 53.34887712
Bulkhead Stiffener 56 1.73615624 3.56 6.180716214 2.3 3.993159352
Web Frame 20 2.737295 2.97 8.12976615 2.4 6.569508
web floor 20 18.23712 0.57 10.3951584 2.4 43.769088
web floor stiffener 204 1.6014 0.57 0.912798 2.4 3.84336
ballast water partition 2 37.2868496 3.6 134.2326586 2.4 89.48843904
bracket 272 3.36294 3.6 12.106584 2.4 8.071056
deck plate 54.0864192 5.94 321.27333 2.4 129.8074061
keel plate 7.897 0.055 0.434335 2.4 18.9528
bottom plate 39.03 0.055 2.14665 2.4 93.672
bilge plate 38.33 0.53 20.3149 2.4 91.992
shell plate 47.6 3.6 171.36 2.4 114.24
pipes, pumps & acessories 8.5 3.4 28.9 2.4 20.4
FENDER 1.45 6 8.7 2.4 3.48
inner bottom plate 1 47.15 1.004 47.3386 2.4 113.16
TOTAL 409.9838081 1036.875195 981.293673

33. NAME OF ITEMS WEIGHT OF ITEMS VCG about KEEL LCG about AMIDSHIP MOMENT about AMIDSHIPQUANTITY OF ITEMS
MOMENT aboutt
KEEL
ENTRANCE
Anchor 1 2.9 7.8 22.62 33.6 97.44
mooring ropes 0.85 7.6 6.46 33.3 28.305
chain cable 1 2.75 7.8 21.45 32 88
stringers 0.95 3.6 3.42 30 28.5
bollard 4 0.6 8 4.8 33.6 20.16
hawse pipes 0.15 7.8 1.17 33.3 4.995
stem bar 1 1.55 6.4 9.92 38.3 59.365
forecastle deck plate 8.2 7.25 59.45 33 270.6
searchlight 1 0.1 8.85 0.885 38.3 3.83
keel plate 0.67 0.055 0.03685 28.938 19.38846
bottom plate 3.2 0.055 0.176 28.938 92.6016
bilge plate 3.23 0.53 1.7119 30 96.9
shell plate 3.48 3.6 12.528 30 104.4
pipes, pumps & acessories 1.9 3.5 6.65 28.938 54.9822
bracket 0.3 3.5 1.05 29.29 8.787
Deck Girder 4 0.87 8.9 7.743 29.29 25.4823
Deck Longitudinal 12 1.75 8.9 15.575 29.29 51.2575
Side Stringer 3 0.97 3.7 3.589 29.29 28.4113
Side Longitudinal 10 0.69 3.7 2.553 29.29 20.2101
Centre Girder 1 0.58 0.55 0.319 29.29 16.9882
Side girder 4 1.85 0.59 1.0915 29.29 54.1865
Bottom Longitudinal 12 0.89 0.06 0.0534 29.29 26.0681
Inner Bottom Longitudimal 10 0.95 0.97 0.9215 29.29 27.8255
Collision Bulkhead 1 5.73 3.96 22.6908 33.6 192.528
Wash Bulkhead 1 3.49 3.96 13.8204 35 122.15
Bulkhead Stiffener 12 1.85 4 7.4 30 55.5
Web Frame 4 0.41 2.97 1.2177 31.185 12.78585
web floor 4 2.34 0.57 1.3338 31.185 72.9729
web floor stiffener 24 0.35 0.57 0.1995 31.9 11.165
inner bottom plate 6.05 1.004 6.0742 31.96 193.358
Deck Beam 4 0.95 8.9 8.455 31.185 29.62575
TOTAL 60.55 245.36455 1918.76926

34. NAME OF ITEMS WEIGHT OF ITEMS VCG about KEEL LCG about AMIDSHIP MOMENT about AMIDSHIPQUANTITY OF ITEMS
MOMENT aboutt
KEEL
RUN
PROPELLER 1 1.9 1.28 2.432 -34.4 -65.36
PROPELLER SHAFT 1 0.95 1.27 1.2065 33.4 31.73
RUDDER & STEERING ARRANGEMENT 1 2.35 3.32 7.802 -34.793 -81.76355
ENGINE 1 4.5 1.5 6.75 -28.792 -129.564
GEAR BOX 1 1.75 1.29 2.2575 -29.9 -52.325
TRANSVERSE BULKHEAD 2 7.75 3.13 24.2575 -29.9 -231.725
Wood , Outfits & accessories 70 10.2 714 -27.7 -1939
STAIRS & RAILING 2 12.5 25 -28.5 -57
FUNNEL & MAST 1.5 14.6 21.9 -36 -54
BOLLARD & CAPSTAN 6 1 6.9 6.9 -35.96 -35.96
MOORING ROPES 1.2 6.9 8.28 -31.13 -37.356
HATCH & HATCH COAMING 2.5 6.4 16 -28.78 -71.95
Auxiliary Machinery 2.9 2.1 6.09 -26.4 -76.56
Generator 3 2.3 6.9 -26.6 -79.8
Engine Foundtion Scantling Weight 2.6 1.1 2.86 -28.153 -73.1978
Deck Beam 6 1.34 5.94 7.9596 -30.191 -40.45594
Deck Girder 4 1.4268 5.94 8.475192 -30.191 -43.0765188
Deck Longitudinal 12 2.3 5.94 13.662 -30.191 -69.4393
Side Stringer 4 1.56 2.587 4.03572 -30.191 -47.09796
Side Longitudinal 8 1.17 2.587 3.02679 -30.191 -35.32347
Centre Girder 1 1.3 0.55 0.715 -30.191 -39.2483
Side girder 4 4.24 0.59 2.5016 -30.191 -128.00984
Bottom Longitudinal 12 1.28 0.06 0.0768 -30.191 -38.64448
Inner Bottom Longitudimal 10 1.28 0.97 1.2416 -30.191 -38.64448
Bulkhead Stiffener 12 2.1 3.56 7.476 -30.191 -63.4011
Web Frame 6 1.01 2.97 2.9997 -30.191 -30.49291
web floor 6 7.12 0.55 3.916 -30.191 -214.95992
web floor stiffener 48 0.55 0.55 0.3025 -30.191 -16.60505
bracket 64 0.65 3.6 2.34 -30.191 -19.62415
deck plate 12.1 5.94 71.874 -27.2 -329.12
keel plate 1.46 0.055 0.0803 -28.193 -41.16178
bottom plate 7.84 0.055 0.4312 -30.2 -236.768
bilge plate 7.69 0.53 4.0757 -29.1 -223.779
shell plate 9.476 3.6 34.1136 -29.1 -275.7516
pipes, pumps & acessories 4.2 3.2 13.44 -35.9 -150.78
OTHERS 3.5 3.1 10.85 -34 -119
inner bottom plate 5.8 1.004 5.8232 -31.5 -182.7

35. Super Structure
Deck Girder 10 2.78 10.14 28.1892 -27.29 -75.8662
Deck Longitudinal 24 1.95 10.14 19.773 -27.29 -53.2155
Deck Plate 3 19.6 10.9 213.64 -26.5 -519.4
Side Stringer 8 0.982 10.4 10.2128 -32.952 -32.358864
Side Longitudinal 14 2.01 10.36 20.8236 -32.952 -66.23352
Superstructure Shell Plate 14.15 10.13 143.3395 -31.9 -451.385
FRONT &back plate 14.2 11.17 158.614 -32.5 -461.5
roof of wheel house 1 0.9 13 11.7 -27.29 -24.561
TOTAL 241.8648 1658.344102 -7022.435233
NAME OF ITEMS WEIGHT OF ITEMS VCG about KEEL LCG about AMIDSHIP MOMENT about AMIDSHIPQUANTITY OF ITEMS
MOMENT aboutt
KEEL

36. SUMMARY
Total Light
Weight 712.7 tonne
COMBINED LCG OF ALL
STRUCTURES FROM AMIDSHIP -5.78661
Total Dead
Weight 2900 tonne
COMBINED VCG OF ALL
STRUCTURES ABOVE KEEL 4.127723
Displacement 3612.7 tonne

37. Deadweight Calculation

38. Tank Name Capacity LCG from
midship
VCG from keel
Oil Tank 1 359.4881 27.277 3.47
Oil Tank 2 485.0664 23.7 3.47
Oil Tank 3 519.456 8.4 3.47
Oil Tank 4 485.52 -0.91 3.47
Oil Tank 5 517.8701 -10.2 3.47
Oil Tank 6 522.1776 -19.85 3.47
Aft Peak Tank 11.67274 -38.663 4.802763
Fore Peak Tank 34.458 33 3.732544
Ballast Tank 1 88.02 27 0.5
Ballast Tank 2 129.7536 17.97 0.5
Ballast Tank 3 138.88 8.3 0.5
Ballast Tank 4 131.3325 -0.9 0.5
Ballast Tank 5 139.968 -10.217 0.5
Ballast Tank 6 135.8864 -19.797 0.5

39. LCG & VCG at Load Waterline
BALLAST WATER WEIGHT 418.5 tonnes BALLAST WATER WEIGHT
418.5
tonnes
TOTAL MOMENT OF ALL BALLAST TANK ABOUT AMIDSHIP
-4662.362 tonnes-
m TOTAL MOMENT OF ALL BALLAST TANK ABOUT KEEL
259.65
tonnes-m
TOTAL WEIGHT OF OIL IN ALL OIL TANKS
2427.245 tonnes
TOTAL WEIGHT OF OIL IN ALL OIL TANKS
2427.245
tonnes
TOTAL MOMENT OF ALL OIL TANK ABOUT
AMIDSHIP
9575.94 tonnes-m TOTAL MOMENT OF ALL OIL TANK ABOUT
KEEL
10026.84
tonnes-m
WEIGHT OF OTHER DEADWEIGHT ITEM
30 tonnes
WEIGHT OF OTHER DEADWEIGHT ITEM
30 tonnes
TOTAL MOMENT OF OTHER DEADWEIGHT ITEMS ABOUT AMIDSHIP
-1050 tonnes-m TOTAL MOMENT OF OTHER DEADWEIGHT ITEMS ABOUT
AMIDSHIP
118.8
tonnes-m
TOTAL WEIGHT OF STRUCTURAL ITEMS IN THE
SHIP
712.7 tonnes
TOTAL WEIGHT OF STRUCTURAL ITEMS IN THE SHIP
712.7 tonnes
TOTAL MOMENT OF STRUCTURAL ITEMS IN THE SHIP
-4122.335 tonnes-
m
TOTAL MOMENT OF STRUCTURAL ITEMS IN THE SHIP
2940.54
tonnes-m
LCG OF THE WHOLE SHIP ABOUT
AMIDSHIP -0.072108
m aft of
amidship VCG OF THE WHOLE SHIP ABOUT KEEL 3.719 mm

40. Stability Calculation And GZ Curves

41. GZ Curve at Lightweight Condition
-1.5
-1
-0.5
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
0 10 20 30 40 50 60 70 80 90 100
GZ
Angle
WL-1
WL-1
Angle Of Vanishing Stability 85.5 Degree
Initial GM 19.3 m
Comparison With IMO Stability Criteria
Properties IMO value WL
Area up to 30 degree (m-rad) ≥ 0.055
1.9897
Area up to 40 degree (m-rad) ≥ 0.09
3.3800
GZ at 30 degree (m) ≥ 0.2
3.4000
Max. GZ at (degree) ≥ 30 (preferable) but not ≤ 25
45

42. GZ Curve at Ballast Condition
-2.000
-1.000
0.000
1.000
2.000
3.000
4.000
5.000
0.000 10.000 20.000 30.000 40.000 50.000 60.000 70.000 80.000 90.000 100.000
Series1
Angle Of Vanishing Stability 87 Degree
Initial GM 5.750 m
Comparison With IMO Stability Criteria
Properties
IMO value
WL
Area up to 30 degree (m-rad) ≥ 0.055
0.969
Area up to 40 degree (m-rad) ≥ 0.09
1.350
GZ at 30 degree (m) ≥ 0.2
3.700
Max. GZ at (degree) ≥ 30 (preferable) but not ≤ 25
39.640

43. GZ Curve at Full Load Condition
-1.000
-0.500
0.000
0.500
1.000
1.500
2.000
0.000 20.000 40.000 60.000 80.000 100.000
Series1
Angle Of Vanishing Stability 80 Degree
Initial GM 3.725m
IMO Stability criteria And Comparison
Area up to 30 degree (m-rad) ≥ 0.055
0.432
Area up to 40 degree (m-rad) ≥ 0.09
0.716
GZ at 30 degree (m) ≥ 0.2
1.650
Max. GZ at (degree) ≥ 30 (preferable) but not ≤ 25
33.600

44. Trim Calculation

45. We Know That,
TRIM=(LCG-LCB)*∆ /MCT 1m
Change in Draft Aft=(L/2-CF)*Trim/L
Final Draft Aft=Draft+Change in Draft Aft
Final Draft Forward=Draft-Change in Draft Aft
Displacement 3588 tonne
LOA 76.2 m
Draft 3.96 m
LCG 0.072 m(aft)
LCB -0.816 m(fore)
MCT 1m 4932.77 tonne - m
LCF 0.046 m
Trim 0.645913756 m
Aft Trim 0.322566956 m
Fore Trim 0.213897224 m
Aft Draft 4.282566956 m
Fore draft 3.746102776 m
So the ship is trimmed by stern

46. Thank You…