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A Fast Offshore Cruiser - Appendices.
A.3. - Deck plating.
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First principles point loaded beam equations.

,

Maximum bending moments (M).

simply supported: -, built in: -

Maximum deflections (y).

simply supported: - , built in: -

First principle calculations of point loaded deck plating.

Location

Main deck

Cabin top

Cockpit

Pod top

Ply No*t (mm)

1*6 + 1*9

1*6 + 1*4

1*9

1*6

Teak t (mm)

1*6

***

***

***

EI span (Nmm2)

1272

618

505

150

W (kg)

160

160

160

160

Span (mm)

360

385

250

385

y (mm)

1.12

0.76

1.01

3.12

Span / y

300

510

245

123

s (N/mm2)

1.275

4.3

5.81

12.6

FOS

36.06

10.65

7.91

3.65
Deck thickness (ABS).

s = stiffener spacing (mm)

c = 1 for flat plate

p = 0.01*F*h, h = depth of bulkhead (m),

k not to be taken as less than 0.5 for cold moulded

s a = 0.5*MoR, for cold moulded (N/mm2)

Minimum deck thickness required by ABS cold moulded rule.

Location

h (m)

Max span (m)

F

k

c

s a

t (mm)

deck

2.43

0.36

1.10

1

1

40

6.59

cabin front

2.43

0.21

1.10

1

1

40

3.84

cockpit

2.43

0.25

1.10

1

1

40

4.57

pod

1.98

0.385

1.10

1

1

40

6.36

cabin top

1.98

0.385

1.10

1

1

40

6.36

cabin side

1.98

0.2

1.10

1

1

40

3.30
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