ABS - 2 PART 5B CH 3 & 4
RULES FOR BUILDING AND CLASSING STEEL VESSELS 2012 PART 5B SPECIFIC VESSEL TYPES (CHAPTERS 3 and 4) Common Structural Rules for Bulk Carriers
| Organization: | ABS |
| Publication Date: | 1 January 2012 |
| Status: | inactive |
| Page Count: | 571 |
scope:
General
Structural requirements
These Rules apply to ships classed with the Society and contracted for construction on or after 1 April 2006. Note: The "contracted for construction" means the date on which the contract to build the ship is signed between the prospective owner and the shipbuilder. For further details regarding the date of "contracted for construction", refer to IACS Procedural Requirement (PR) No.29.
These Rules apply to the hull structures of single side skin and double side skin bulk carriers with unrestricted worldwide navigation, having length L of 90 m or above.
With bulk carrier is intended sea going self-propelled ships which are constructed generally with single deck, double bottom, hopper side tanks and topside tanks and with single or double side skin construction in cargo length area and intended primarily to carry dry cargoes in bulk, excluding ore and combination carriers.
Hybrid bulk carriers, where at least one cargo hold is constructed with hopper tank and topside tank, are covered by the present Rules. The structural strength of members in holds constructed without hopper tank and/or topside tank is to comply with the strength criteria defined in the Rules.
The present Rules contain the IACS requirements for hull scantlings, arrangements, welding, structural details, materials and equipment applicable to all types of bulk carriers having the following characteristics:
L < 350 m
L / B > 5
B / D < 2.5
CB ≥ 0.6
The Rule requirements apply to welded hull structures made of steel having characteristics complying with requirements in Ch 3, Sec 1. The requirements apply also to welded steel ships in which parts of the hull, such as superstructures or small hatch covers, are built in material other than steel, complying with requirements in Ch 3, Sec 1.
Ships whose hull materials are different than those given in [1.1.4] and ships with novel features or unusual hull design are to be individually considered by the Society, on the basis of the principles and criteria adopted in the present Rules.
The scantling draught considered when applying the present Rules is to be not less than that corresponding to the assigned freeboard.
Where scantlings are obtained from direct calculation procedures which are different from those specified in Ch 7, adequate supporting documentation is to be submitted to the Society, as detailed in Sec 2.
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