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•Operations and Maintenance manual. If moveable platforms (decks) are arranged in ro-ro spaces, similar drawings of ramps for vehicle loading are to be submitted.
ABSGUIDE FOR CERTIFICATION OF LIFTING APPLIANCES.2007 165Section 2: Design CriteriaC H A P T E R 6 Guide for Certification of Stern, Bow and Sideport Ramps and Moveable Platforms (Decks) S E C T I O N 2 Design Criteria 1 General The strength of ramps and moveable platforms (decks) is to comply with the following design criteria. 3 Stern, Bow and Sideport Ramps Design calculations for the ramp structure are to be submitted in support of the above loading conditions in accordance with: i) 3-2/5.5 of Chapter 3, “Guide for Certification of Cargo Gear on Merchant Vessels” of this Guide. ii) 3-2-3/Table 1, Equation C of the ABS Rules for Building and Classing Steel Vessels(Steel Vessel Rules) for platform decks in enclosed cargo spaces. iii) 3-2-3/5.17 of the Steel Vessel Rulesfor forklift trucks. iv) 3-2-3/7.1 and 3-2-3/7.3 of the Steel VesselRulesfor decks of higher-strength material. v) Manual of the American Institute of Steel Construction, eighth or later edition, Sections 1.5 and 1.6 and other applicable sections. vi) Where the various strength members are subjected to compressive or shear stresses, the stability of the local plate panels and the supporting members is to be checked against buckling. Calculations, showing that adequate strength has been provided against buckling, are to be submitted for review. For column buckling, see 2-2/5.7, 2-2/5.9 and 2-2/5.11 of Chapter 2, “Guide for Certification of Cranes” of this Guide. vii) For operational conditions, ramps are to be reviewed to the self weight and applied loads multiplied by the submitted corresponding dynamic amplification factors. The dynamic amplification factors need not be verified by the Bureau through an independent analysis, unless specifically requested by the submitter.
Chapter 6 Guide for Certification of Stern, Bow and Sideport Ramps & Moveable Platforms Section 2 Design Criteria 6-2 166ABSGUIDE FOR CERTIFICATION OF LIFTING APPLIANCES.2007 5 Moveable Platforms (Decks) 5.1 Loading The following loading criteria are to be taken into account: i) Assume free end supports for beams and girders unless ends are effectively fixed. ii) For uniform cargo loading, use plating thickness required by 3-2-3/Table 1, Equation C of the Steel Vessels Rulesfor platforms decks in enclosed cargo spaces. iii) For vehicles, use plating thickness required by 3-2-15/13.7, 3-2-3/5.17 and 3-2-3/7.3 of the Steel Vessel Rulesfor forklift trucks on hatch covers. iv) Use static load and imprint submitted by designer. v) Check each member for the worst possible loading condition. vi) Dynamic load increases due to rolling, pitching and heaving accelerations are disregarded.