Section 2 Design and construction of machinery

2.1.1 Details of the proposed principles of operation of the equipment, together with the design specifications, including the applied loads of the lifting appliance to be appraised.

2.1.2 Calculations of the power and braking requirements of the winch system(s).

2.1.3 Detailed design plans and calculations of the machinery which include details of gearing, torque transmitting shafting together with all couplings (keys, splines, flanges, etc.), bearings, clutches and assembly details, rope drum including full fabrication details, braking device(s) and the attachment of the machinery to the supporting structure. All material specifications and mechanical properties are to be provided for each component.

2.1.4 Details of the rope drum(s) storage under all operating conditions are to be provided, indicating the maximum number of rope layers to be considered under working conditions.

2.1.5 Details of the general arrangement, showing rope orientation and securing devices, and sectional arrangement of the machinery.

2.1.6 Diagrammatic arrangement plans of the hydraulic and pneumatic piping systems, where fitted, together with specifications of the principal components.

2.1.7 Where hydraulic power packs are of proprietary manufacture, they are to be Type Approved by LR. Alternatively, operational parameters and detailed plans including materials lists and mechanical properties of the components of the system and any manufacturer’s catalogues as applicable are to be submitted.

2.1.8 For electrically powered lifting equipment see Ch 10 Electrotechnical Systems.

2.1.9 Details of torque limiting and over-run/under-run limiting devices, where fitted.

2.1.10 Where proprietary equipment, such as gearboxes, brakes or clutches, is included in the machinery, it is to be Type Approved by LR, and is to cover not less than the full load spectrum of the machinery associated with the lifting appliance. Alternatively, operational parameters and detailed plans, including materials lists and mechanical properties of the components of the system and any manufacturer’s catalogues as applicable, are to be submitted.

2.1.11 Details/plans of the foundation securing arrangements, including materials and mechanical properties, are to be submitted. Calculations demonstrating the strength of the foundation securing arrangements under the maximum loaded condition of the lifting appliance are to be submitted. These should include any dynamic effects on the system.

2.2.1 The materials applied are to be in compliance with Ch 1, 1.6 Materials and fabrication, Ch 11 Materials and Fabrication and relevant Sections related to materials in the individual Chapters. The fabrication is to be in compliance with Ch 11, 2 Fabrication of classed lifting appliances or Ch 11, 3 Fabrication of certified lifting appliances.

2.2.2 The required material certificates are given in Table 13.2.1 Minimum requirements for the certification of lifting appliances and Table 13.3.1 Minimum requirements for the classification of lifting appliances as applicable.

2.2.3 In cases where machinery is exposed to the environment, demonstration of a material’s suitability for operations at low temperature is required. For the definition of the minimum design temperature see Ch 11, 1.2 General material requirements 1.2.4. High strength structural steels are to be in compliance with the impact test requirements as listed in Ch 11, 1.2 General material requirements 1.2.2. Machinery components fabricated from alloy steels such as 42CrMo4QT and 34CrNiMo6QT are to be in compliance with Ch 4, 2.25 Materials 2.25.2 and impact tested as per Ch 4, 2.25 Materials 2.25.4.