Section 2 Construction

201. General

Special consideration is to be given, such as the provision of longitudinal bulkheads at the center line or similar strengthened constructions.

202. Arrangement

Bottom transverses, side transverses and deck trans-verses are to be provided at an interval of less than about 3.5 m in one plane.

203. Bottom Longitudinals

The section modulus of bottom longitudinals is not to be less than obtained from the following for- mula:

Ě Ņ ĶǾJ ĊÁᾨĪ (cm3)

where :

Ċ = Spacing of longitudinals (m)

l = Span measured between the adjacent supports of longitudinals (m)

204. Bottom Transverses

The scantlings of bottom transverses are not to be less than obtained from the following formula:

L

Section modulus : Ě Ņ KǾĨ ĊÁᾨ Ī (cm3), Thickness of web : ᾼ Ņ LǾLÌ ᾘ

Ñ ÌǾJ (mm)

where:

Ċ = Spacing of transverses (m)

l = Span measured between the adjacent supports of transverses (m)

ᾘL = Depth of web (mm)

205. Side Longitudinals

The section modulus of side longitudinals is not to be less than obtained from the following formula.

Ě Ņ ĶǾJ ĊᾜᾨĪ (cm3)

where:

Ċ = Spacing of longitudinals (m)

l = Span measured between the adjacent supports of longitudinals (m)

ᾜ = Vertical distance from the longitudinals to a point of Á above the top of keel (m), but to betaken as LǾĮΡ̓ÜÃ (m), where the distance is less than LǾĮΡ̓ÜÃ (m)

206. Side Transverses

The scantlings of side transverses are not to be less than obtained from the following formula:

L

Section modules : Ě Ņ K ĊᾜᾨĪ (cm3), Thickness of web : ᾼ Ņ LǾLÌ ᾘ

Ñ ÌǾJ (mm)

where :

Ċ = Spacing of transverses (m)

l = Span measured between the adjacent supports of transverses (m)

ᾜ = Vertical distance from the centre of l

to a point of

Á above the top of keel (m), but to be

taken as LǾĮΡ̓ÜÃ (m), where the distance is less than

ᾘL = Depth of web (mm)

LǾĮΡ̓ÜÃ (m)

207. Longitudinal beams

1. The section modules of longitudinal beams for the midship part is not to be less than obtained from the following formula:

Ě Ņ ÌǾÌĨ ĊᾜᾨĪ (cm3)

where:

Ċ = Spacing of longitudinal beams (m)

l = Span measured between the adjacent supports of longitudinal beams (m)

ᾜ = Deck load specified in Ch 10, 201. (kN/m2)

2. Beyond the midship part, the section modules of longitudinal beams may be gradually reduced, the section modules is not to be less than obtained from the following formula:

but

Ě Ņ LǾĨĮ ĊᾜᾨĪ (cm3)

where :

Ċ, ᾜ and l

= As specified in Par 1.

208. Deck transverses

The scantlings of deck transverses are not to be less than obtained from the following formula:

L

Section modules: Ě Ņ LǾĨKĨ ĊᾜᾨĪ (cm3), Thickness of web: ᾼ Ņ LǾLÌ ᾘ

Ñ ÌǾJ (mm)

where:

Ċ = Spacing of deck transverses (m)

l = Span measured between the supports of deck transverses (m)

ᾜ = Deck load specified in Ch 10, 201. (kN/m2)

ᾘL = Depth of web (mm)