Section 6 General Cargo Containers

601. Application

The requirements in this Section apply to general cargo containers of closed type and open top type.

602. Materials and workmanship

1. Materials

(1) Steel plates used in construction of containers are to have good weldability, and higher strength and low alloy steel plate is to be identified their chemical and mechanical properties by the steel maker's mill sheet, etc.

(2) Materials such as aluminium, FRP, etc. are to be complied with the specifications, and their chemical and mechanical properties are to be ascertained through the test reports, mill sheets, etc. which are issued by the manufacturer.

(3) Corner fittings are to have not only the dimensions which comply with the requirements of this chapter and ISO 1161 but the quality not lower than the grade of RSC 480-W of Pt 2, Ch 1,

501. of the Rules or equivalent thereto, and to be passed material test by the Society.

However, the Society may consider omission of material test if the manufacturer can submit the test report which is considered proper by the Society.

(4) Where woods are used in a floor, those are to be free from defect and properly dried and preserved. Container manufacturer is to submit the details to the kinds of woods and method of

preservation.

(5) Welding materials are to be of one which type approved by the Society in accordance with the requirements of Pt 2, Ch 2, Sec 6 of the Rules for Classification of Steel Ships and to be well controlled in accordance with the manufacturer's recommendations.

(6) Caulking materials filled in the joints are to be of acceptable type by the Society.

2. Workmanship

(1) Material processing such as bending, pressing, etc. are to be carried out by means of avoiding any defects such as crack.

(2) At the time of approval of manufacturing process, welding for type-series containers is to be carried out in accordance with the procedures approved by the Society and by the welding oper-

ators qualified as 1G(F),

2G(H) or 3G(V) of grade 1 by the Society in accordance with the re-

quirements of Pt

2, Ch 2, Sec 5 of the Rules for Classification of Steel Ships or processing

the equivalent

qualification.

(3) For the fabrication of main frame, total dimension of containers is to be maintained dimensional accuracy within the permissible tolerance by using suitable jigs.

(4) Floorings are to be provided without unacceptable gap or off-set of woods.

603. Dimensions and ratings