10.5.3 Selection of Lifting Appliance

The choice of lifting appliance, e.g. hand chain hoist, electric power operated hoist, pneumatic power operated hoist, etc., will depend on the frequency of use, nature of the load and working environment. Guidance on hand chain hoists will be found in x-svn:///svn/leea/dita/xml/topics/TOP_00000000/TOP_00000048.html and on power operated hoists in x-svn:///svn/leea/dita/xml/topics/TOP_00000000/TOP_00000157.html of this code. The lifting appliance must be compatible with the section of the jib arm track. The weight of the appliance and its dimensional bulk must be considered. Consideration must be given to the relative position of the bottom hook and the end approach of the appliance. In the case of power travel trolleys, the necessary clearances for drive motors and balance weights may be greater than for geared or push trolleys and must therefore be taken into account, as should the dynamic effects the appliance may impose on the jib arm.

The capacity of the lifting appliance must be the same as that of the jib crane so as to avoid confusion from differently marked SWLs. In the case of power operated hoists, the type of power feed to be used must also be taken into consideration.

These factors will affect the design of the jib crane and may also restrict load placement. The slewing angle of the jib arm may be affected by the chosen lifting appliance and power feed system and may need to be restricted due to this.