Section 1 Beams

101. Arrangement of Transverse Beams

Transverse beams are, as a rule, to be provided at every frames.

102. Camber of Weather Deck

It is recommended that the camber of weather deck is to be B/50.

103. Section Modulus of Beams 【See Guidance】

The section modulus of beams is not to be less than obtained from the following formula:

ĚŅǼĊᾜᾨĪ Ncm Į Ń

where,

ᾨ : Horizontal distance from the inner edge of Beam brackets to the nearest line of support of deck or between the adjacent lines of support of deck (m ).

Where ᾨ is less than 0.25 Æ in the upper deck beams except those at the end parts, ᾨ is to be taken as 0.25 Æ . Where ᾨ is less than 0.2 Æ in the beams at the end parts of upper deck or in the superstructure deck beams, ᾨ is to be taken as 0.2 Æ .

Ċ : Spacing of beams (m ).

Ǽ : Coefficient given below:

Longitudinal beams

(1) Midship part : 3.4

(2) Elsewhere : Transverse beams:

ᾜ : As specified in Ch

203. 3, ᾜ is to be

2.9

2.9

7, 203. (kNÕmĪ). Where, however, the value is as specified in Ch 7,

as specified in the following:

(1) Afore 0.3 Ã from the fore end : 0.32 Ã + 4.5 (kNÕmĪ)

(2) Abaft 0.3 Ã from the fore end : 0.16 Ã + 4.5 (kNÕmĪ )

104. End Connections

Beams and frames are to be connected each other by means of brackets. The length of arms of the brackets is not to be less than 1/8 of ᾨ specified in Ch 8, 401.

105. Beams of Decks Forming Tops of Deep Tanks

The scantlings of beams provided on the decks forming the tops of deep tanks are to be in ac-

cordance with the requirements for deep tanks as bulkhead stiffeners regarding the decks tank bulkheads, in addition to those in this chapter.

as deep

106. Beams of Decks Carrying Specially Heavy Loads

Beams of decks which carry heavy loads such as deck machinery and others are to be strengthened.

properly

107. Transverse Strong Beams supporting Deck Longitudinals

Where longitudinals framing is adopted in the deck construction, transverse strong beams supporting deck longitudinals are to be provided in a spacing of about 2.4 m . In this case the scantlings and construction thereof are to be in accordance with the discretion of the Society.

108. Hat-type Construction

The scantlings of beams of hat-type construction are to be in accordance with the requirements in

Ch 1, 305. in addition to those in this chapter.