6.6 INFORMATION WHICH SHOULD BE EXCHANGED BETWEEN THE USER AND THE DESIGNER OR SUPPLIER
As electric power operated hoists are frequently used for miscellaneous lifting purposes, precise details of the load to be lifted are not always available. In these circumstances, only a general specification can be given, and this should include the following information:
Maximum load to be lifted or SWL.
Type of hoist, i.e. chain or wire rope.
Range of lift.
Maximum drawn up dimension.
Maximum extended dimension.
Type of suspension, e.g. hook/eye, push/geared/electric travel trolley, in the case of a trolley suspension, details of the runway beam section and size.
Lifting speed(s).
Power supply, voltage, phase(s) and frequency.
Details of the power feed system if required.
Type of control, e.g. pendant, remote, etc., including pendant length, etc. If unspecified, the manufacturer will assume pendant control and this will be arranged to suit the hoist on the basis of the operating level being at the extended dimension.
Special service conditions or safety requirements which may affect the hoist design, e.g. outdoor use, use in a flammable atmosphere, etc.
Classification if known or details of the state of loading and duty cycle, etc.
Any accessories that may be required, e.g. slack chain collecting box, working limits, etc.
Any other special requirements.
It may subsequently be found that a more detailed exchange of information is necessary to ensure the correct selection. For all but the simplest or repeat installations, a visit by the supplier to survey the site should always be considered as this will minimize the information exchange and reduce the chance of incorrect selection.
Further technical information may be required by the user at the time of installation or for maintenance purposes. It will be contained in the manufacturer’s operations and maintenance handbook, which will be supplied with the hoist, and does not otherwise form part of the information exchange.
Unless instructed otherwise, the supplier will assume the hoist is to be used in normal service conditions and the hoist will be supplied from the manufacturer’s standard range of equipment.