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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:
ᾍ, ᾎ = As given in Table 10.1
ᾚ = 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
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 ᾍ and ᾎ
Colu mn | Position of deck | ᾍ | ᾎ | ||||
Deck plating | Beams | Deck girders | Pillars | ||||
à P90m | 90 m ≤ à ≤ 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). |
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 ≤ à ≤ 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 |