Iranian Classification Society Rules
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Section 2 Barges Intended to be classified as Coastal Service
201. Application
The requirements in this section are applicable to the barges intended to be classified as coastal service.
202. Reductions of scantlings of members
1. The scantlings of structural members may be reduced by the ratios given in Table 23.1 in relation to the requirements in the relevant chapters, but in no cases are they to be less than each mini- mum scantling in the same table.
2. Reduction of scantlings of members other than given in Table 23.1 may be of the Society.
made at the discretion
Table 23.1 Reductions of scantlings of members and minimum scantlings
Items | Coastal | Smooth water | Minimum scantlings |
Longitudinal strength | 5 % | 10 % | - |
Shell platings (including plate keels) | 5 % | 10 % | 6 mm, except superstructures |
Minimum thickness of deck platings | 1 mm | 1 mm | 5 mm |
Section modulus of frames (including bottom longitudinals) | 10 % | 20 % | 30 cm3 |
Section modulus of beams | 15 % | 15 % | - |
Section modulus of deck girders | 15 % | 15 % | - |
Thickness of plates of double bottom members | 1 mm | 1 mm | 5.5 mm |
Thickness of plates of single bottom members | 0.5 mm | 10 % or 1 mm whichever is the smaller. | - |
Plate thickness and section modulus of superstructure end bulkhead | 10 % | 10 % | - |
3. The scantlings of the structural members of deck beams supporting deck cargoes, inner bottom plates and longitudinals supporting heavy cargoes and deep tanks are not to be reduced from the values specified in the relevant chapters, notwithstanding the provisions in Par 1 and 2.
203. Equipment
1. Equipments given in Table 19.1 are to be provided according to their equipment numbers obtained from the formula in Ch 19. However, the mass of one of the two anchors may be reduced to 857 of the mass given in the Table 19.1.
2. The mass of an anchor required to be provided with for unmanned barges, is not to be less than given in Table19.1.
3. For unmanned barges which are not engaged in the international voyage, the requirements for equipment specified in Ch 19 may be omitted at the request of owner when considered appropriate by the Society. 【See Guidance】
204. Bilge discharge systems
In bilge discharge systems, the number of two bilge suction pumps specified in Ch 20, 407. 2
may be reduced to one.