Section 3 Service lifts

3.1.1 This Section applies to electric and hydraulic powered service lifts which are generally not to be accompanied by personnel. Service lifts may be operated whilst the ship is in a harbour or sheltered water environment (i.e. Standard Service Category) and/or when the ship is at sea (i.e. Specified Service Category).

3.1.2 This Section applies also to service lifts where cargo may be stowed on them in their stowed position whilst the ship is at sea.

3.1.3 Service lifts are in principle to be designed as per Section 2 unless otherwise stated in this Section.

3.1.4 For the operating condition within the confines of a harbour or sheltered waters, see Ch 7, 3.1 General 3.1.1. The service lift is to be considered with respect to the following forces and loads:

1. Self-weight of car and counterweight (if applicable).

2. Rated load and loading operations (if applicable).

3. Dynamic forces due to cargo lift motion.

4. Forces due to static inclination.

3.1.5 For the operating condition while the vessel is at sea (if applicable, see Ch 7, 3.1 General 3.1.1), the service lift is to be considered with respect to the following forces and loads:

1. Self-weight of car and counterweight (if applicable).

2. Rated load and loading operations (if applicable).

3. Dynamic forces due to cargo lift motion.

4. Forces due to ship motion and static inclination.

3.1.6 The service lift structure is also to be examined with respect to the stowed condition for the following criteria appropriate to the ship’s characteristics:

1. Self-weight of car and counterweight (if applicable).

2. Rated load (if applicable, see Ch 7, 3.1 General 3.1.2).

3. Forces due to ship motion and static inclination.

3.1.7 For the safety device operation or the service lift striking the buffers, the lift is to be designed with respect to the following forces:

1. Self-weight of the car and counterweight (if applicable).

2. Rated load.

3. Dynamic forces due to service lift motion.

4. Forces due to static vessel inclination.

3.2.1 The safety factor of the means of suspension, defined as the ratio of minimum breaking load of the rope/chain to the maximum load on the rope/chain when the car is at its lowest level and subjected to its rated load, is to be not less than 8:1 in the case of suspension chains and wire ropes.

3.3.1 The safety gear may be of the instantaneous type.

3.4.1 The car is to be fitted with a door. Alternative proposals to prevent the rated load from getting in contact with items outside the car (i.e. lift trunk) will be specially considered.

3.4.2 The landing doors are to be in accordance with Ch 7, 2.15 Landing doors 2.15.2. Alternative proposals to install manual single leaf doors will be specially considered.

3.5.1 The following parts from Ch 7, 2 Passenger liftsare explicitly not applicable to service lifts:

1. Table 7.2.1 Rated load.

2. Ch 7, 2.13 Lift trunk and motor room 2.13.7.

3. Ch 7, 2.15 Landing doors 2.15.4.

4. Ch 7, 2.16 Emergency means of escape.