Section 2 Superstructure End Bulkheads

201. Water head

1. The water head for calculating the scantling of than that obtained from the following formula.

superstructure end bulkhead "Y" is not to be less

ŴẄFẄX GŻ F (tĤmË )

Ŵ and Ẅ : value specified in Table 8.1

Ẅ : 1.0

Table 8.1 Value of

Ŵ and Ẅ

X : Value given in following formula

Ä is less than 90 m : 0.067 Ä

Ä is more than 90 m : 0.051 Ä + 1.45

Ż : vertical distance from the load line to the midpoint of span of stiffener in case where the

scantlings for stiffeners are determined, and to the midpoint of plating in case where scantlings for bulkhead platings are determined (m )

the

Ch 8

2. The water head "Y" is not to be less than that obtained from the following formula irrespective of the provision in Par 1.

202. Thickness of bulkhead plating

1. The thickness of superstructure end bulkhead platings is not to be less than that obtained from the following formula.

ĖÅĬJY (mm)

h : water head specified in 201.

Å : spacing of stiffeners (m )

2. The thickness of superstructure end bulkhead platings is not to be less than that obtained from the following formula irrespective of the provision in Par 1.

Ä

JËŊŊ ĞĖĦŊ (mm)

203. Stiffeners

1. The section modulus of stiffeners on superstructure end bulkheads is not to be less than that ob- tained from the following formula.

ĖĦÈÅYŶË (cm Ė)

Å : spacing of stiffeners (m )

Y : head of water specified in 201.

Ŷ : height between decks (m ). However, Ŷ is less than 2 m , Ŷ is to be taken as 2 m .

2. Both ends of stiffeners on the exposed bulkhead of superstructure are to be connected to the deck by welding except otherwise approved by this society.