Iranian Classification Society Rules

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Section 2 Deck Load


201. Value of h


1. Deck load h (kN/m2) for decks intended to carry ordinary cargoes or stores is to be in accordance with the following (1) through (3) :

(1) h is to be equivalent to the standards given by 7 times the tween deck height at side of the space(m), or 7 times the height from the deck concerned to the upper edge of hatch coaming of the above deck (m). However, h may be specified as the maximum design cargo weight per

unit area of deck (kN/m2). In this case, the value of loading height of cargo.

h is to be determined by considering the

(2) Where timber and/or other cargoes are intended to be carried on the weather deck,

h is to be

the maximum design cargo weight per unit area of deck (kN/m2), or the value specified in Par 2, whichever, is the greater.

(3) Where cargoes are suspended from the deck beams or deck machinery is installed,

suitably increased .

h is to be

2. Deck load

h (kN/m2) for the weather deck is to be as specified in the following (1) to (4):

(1) h for the freeboard deck and the superstructure deck and the top of deckhouses on the free- board deck is not to be less than obtained from the following formula:

ᾜ Ņ ᾍNᾎᾚ Ň ←Ń (kN/m2) where:

, = As given in Table 10.1

= As obtained from the following formula:

à P 90 m : ᾚ Ņ LǾLĴK à , 90 m ≤ à ≤ 150 m : ᾚ Ņ LǾLJÌ Ã Ñ ÌǾĨJ

= vertical distance from the load line to weather deck at side (m), and is to be measured at fore end for deck forward of 0.15Ã abaft the fore end; at 0.15Ã abaft the fore end for deck between 0.3Ã and 0.15Ã abaft the fore end; at midship for

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deck between 0.3Ã abaft the fore end and 0.2Ã afore for deck aftward of 0.2Ã afore the aft end

(2) h for deck in Line II in Table 10.1, need not exceed that in Line

the aft end; and at aft end


I.

(3) h

is not to be less than obtained from the following formula in Table 10.2, irrespective of the

provision in (1) and (2).

less than 12.8.

Where h

value calculated from the formula in Table 10.2 is not to be


Table 10.1 Values of and



Colu mn


Position of deck



Deck plating

Beams


Deck girders


Pillars

à P90m

90 m ≤ Ã ≤ 150 m


I

Forward of 0.15Ã abaft the fore end


14.7


9.80


9.81 (0.84 Ã /100 + 0.25)


7.35


4.90


1.42


II


Between 0.15Ã and

1.3Ã abaft the fore end


11.8


7.85


9.81 (0.69 Ã /100 + 0.2)


5.90


3.90


1.20


III

Between 0.3Ã abaft the fore end and 0.2Ã afore the aft end


6.90


4.60


9.81 (0.38 Ã /100 + 0.13)


2.25(1)

3.45(2)


2.25


1.0


IV

Afterward of 0.2Ã

afore the aft end


9.80


6.60


9.81 (0.38 Ã /100 + 0.13)


4.90


3.25


1.15

NOTES:

(1) In case of longitudinal deck girders outside th line of hatchway opening of the strength deck in midship part of ship.

(2) In case of deck girders other than (1).


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Table 10.2 Minimum value of h



Column


Position of deck


h

Ǽ


Deck plating

Beams


Transverses, Longitudinal deck girders and pillars


à P 90m


90 m ≤ Ã ≤ 150 m


I and II

Forward of 0.3Ã abaft the fore end


C Ρ̓ L + 50


4.20


2.85


9.81/100 (0.23Ã + 8.3)


1.37


III

Between 0.3Ã abaft the fore end and 0.2Ã afore aft end


2.05


1.37


9.81/100 (0.12Ã + 3.2)


1.18


IV

Afterward of 0.2 Ã afore the aft end


ǼΡ̓ÜÃ


2.95


1.95


9.81/100 (0.17Ã + 4.7)


1.47

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