Section 3 Materials, Welding and Construction

301. Materials

1. The materials used for hull construction and equipments are to be those complying with the re- quirements in Pt 2, Ch 1 of the Rules, unless otherwise specified.

2. Application of steels used for the hull construction is to be in accordance with the requirements in

Pt 3, Ch 1, 405. of the Rules.

3. Service limitation for materials of piping, valves and fittings is to be in accordance with the re- quirements in Pt 5, Ch 6, 102. and 103. of the Rules.

4. Materials used for pneumatic piping system with the maximum working pressure above 2 MPa and for fuel oil pipes, valves and fittings in fuel oil piping system, and also for valves, distance pieces and pipes attached to the shell plating and valves attached to the collision bulkheads are to be in compliance with the requirements of standards acceptable by the Society.

5. For materials used for piping system, except for those specified in Par 4, the Surveyor may re- quired to submit the results of tests carried out by the manufacturers.

302. Scantlings

1. The scantlings of hull structural members are framed for the case where mild steel is used. Where high tensile steel is used for hull structural members, the scantlings of which are to be in accord- ance with the discretion of the Society.

2. Unless otherwise specially specified, the section modulus of members required by this rule are those including the steel plates with the effective breadth of 0.1ᾨ on either side of the members. However, the breadth of 0.1ᾨ is not to exceed one-half of the spacing of member. ᾨ is the length specified in the relevant chapter.

3. The standard depth of girders supporting frames, beams or stiffeners, unless otherwise specified, is to be one-twelfth of ᾨ , where ᾨ is the length specified in the relevant chapter.

4. The inside radius of flanged plates is not to be less than twice but not more than three times the thickness of steel plates.

5. Girders are to be properly increased in scantlings where angle of inclination between web of the girder and shell plating is small, and suitable means are to be provided for tripping as the case may required.

303. Welding

We1ding to be used in hull construction and important equipment is to be in accordance with the requirements in Pt 3, Ch 1, Sec 5 of the Rules.

304. Connection of ends of stiffeners, girders and frames

1. Where the ends of girders are connected to the bulk-heads, tank tops, all girders are to be balanced by effective supporting members on the tank tops, etc.

etc., the end connections of opposite sides of bulkheads,

Rules for the Classification of Steel Barges 2015 3

Ch 1 General Ch 1

2. Length of the frame-side arm of bracket, connected to the frames or stiffeners of the bulkhead or

deep tanks, etc., is not to be less than one-eighth of erwise specially specified.

l specified in the relevant chapter, unless oth-

305. Modification of ᾨ

Where brackets of not less thickness than that of the girder plates, the value of ᾨ specified in Ch 11, 12, 14 and 15 may be modified in accordance with the followings:

1. Where the face area of the bracket is not less than one-half of that of the girder and the face plates or flange on the girder is carried to the bulkhead, deck, tank top, etc., the length ᾨ may be measured to a point 0.15 m inside the toe of bracket.

2. Where the face sectional area of the bracket is less than one-half of that of the girder and the face

plate or flange on the girder is carried to the bulkhead, deck tank top, etc., a point where the sum of sectional area of the bracket out-side the line

ᾨ may be measured to of girder and its free

flanges is equal to the sectional area of free flanges of girder, or to a point 0.15 m inside the toe

of bracket, whichever is the greater.

3. Where brackets are provided and the face plate or flange on the girder are extended along the brackets to the bulkhead, deck, tank top, etc., the face plate or flange of bracket may be curved, but ᾨ is to be measured to the toe of bracket.

4. Brackets are not to be considered effective beyond the point where the arm on the girder is 1.5 times the length of arm on the bulkhead, deck, tank top, etc.

5. In no case is the allowance in girder.

ᾨ at either end to exceed one-quarter of the overall length of the

306. Equipment

Masts, riggings, cargo handling gears, anchoring and mooring arrangements, and other than those specified in this rule are to be suitably arranged according to their uses and are to satisfy the tests as may be required by the Surveyor.

307. Ceilings and sparrings

Ceilings and sparrings in hold are to be in accordance with the requirements in Pt 4,

Rules.

Ch 6 of the

308. Cementing and painting

Cementing and painting are to be in accordance with the requirements in Pt 4, Ch 7 of the Rules.

309. Carriage of oil or other flammable liquid substances

1. The requirements for construction and arrangement for carriage of fuel oils specified in this rule are to be applied to the case intended to carry fuel oils having a flashpoint of 60 ℃ or above

at a

closed cup test.

2. The construction and arrangement for carriage of fuel oils having a flashpoint below 60 ℃ at a closed cup test, are to be in accordance with the requirements provided in this chapter, or the spe- cial requirements are to be applied.

3. The construction and arrangement of deep oil tanks intended to carry cargo oils are to be corre- spondingly in accordance with the requirements in Ch 22

4 Rules for the Classification of Steel Barges 2015

Ch 2 Classification Surveys Ch 2