Section 3 Cargo and vehicle lifts

3.1.1 This Section applies to cargo and vehicle lifts operated whilst the ship is in a harbour or sheltered water environment and where cargo or vehicles may be stowed on them in the sea-going condition, i.e. Standard Service Category.

3.1.2 Where the lift is designed to operate in conditions other than those defined in Ch 6, 3.1 General 3.1.1, the design is to be subject to special consideration, i.e. Specified Service Category.

3.1.3 The lift is to be considered with respect to design loads and requirements stated in Ch 6, 2 Loading and design criteria.

3.2.1 The lift is to be considered with respect to design loads resulting from the following conditions:

1. Case 1 – Operating condition.

2. Case 2 – Sea-going or stowed condition.

3. Case 3 – Test load condition.

3.2.2  Case 1. The lift is to be considered with respect to the self-weight and applied load multiplied by a dynamic factor of 1,20, together with the horizontal forces as defined in Ch 6, 2.4 Forces due to ship motion 2.4.2. This is represented by the following expression:

1,2 (L _w + L _c ) + L _h1 + L _h2

where

3.2.3  Case 2. The lift is to be considered with respect to the forces resulting from the accelerations due to ship motion, together with the forces due to consideration of static inclination as defined in Ch 6, 2.4 Forces due to ship motion 2.4.3 or Ch 6, 2.4 Forces due to ship motion 2.4.4, together with weather forces appropriate to its stowed position. The lift can be loaded with cargo or can be stowed unloaded.

3.2.4  Case 3. The lift is to be considered with respect to forces due to the self-weight plus the test load, L _t, multiplied by a dynamic factor of 1,20. This case is represented by the following expression:

1,2 (L _w + L _t )

where