Section 3 Deck Plating

301. Thickness

1. The thickness of deck plating is not to be less than obtained from the formula given in Table 6.1.

However, within such enclosed spaces as superstructures, deckhouses, etc., the thickness may be re- duced by 1 mm.

2. Where strength deck is transversely framed, or decks inside the line of openings are longitudinally framed, sufficient care is to be taken to prevent buckling of the deck plating.

302. Thickness of the top of tanks

The thickness of deck plating forming the top of tanks is not to be less than required in Ch 15,

202. for deep tank bulkhead plating, taking the beam spacing as the stiffener spacing.

303. Under boilers or refrigerated cargoes

1. The thickness of effective deck plating under boilers is to be increased by 3 mm above the normal thickness.

2. The thickness of deck plating under refrigerated cargoes is to be increased by 1 mm above the nor-

mal thickness. Where special means for the vided, the thickness neednot be increased.

protection against the corrosion of the deck is

pro-

Table 6.1 Thickness of deck plating