10.6 INFORMATION WHICH SHOULD BE EXCHANGED BETWEEN THE USER AND THE DESIGNER OR SUPPLIER

As the variation of design is wide and jib cranes can be made to suit the application within a broad range of standard components, the exchange of information should be as detailed as possible. Wherever possible, a detailed drawing of the intended location, showing any existing installations and possible obstructions such as trunking, ducting and suspended lighting, should be provided by the user. A visit by the supplier to survey the site should always be considered as this will minimise the necessary information exchange and reduce the chance of incorrect selection. The information exchange should therefore include the following:

  1. Type and style of jib crane required i.e. wall/column mounted or free standing, over-braced or underbraced.

  2. Details of the load to be lifted or SWL.

  3. Type of lifting appliance to be used.

  4. Effective radius and minimum radius, thereby giving the effective travel.

  5. Height to underside of arm or effective height required.

  6. Total headroom available for the installation.

  7. Slewing angle required.

  8. Classification of the crane. (See note 2)

  9. If electric power feed equipment is to be supplied, the type required. This should be accompanied with details of the power supply available, including voltage, phase(s) and frequency.

  10. If pneumatic power feed equipment is to be supplied, the type required. This should be accompanied with details of the air supply available, including pressure and rate of delivery.

  11. If free standing jib crane:

    1. Size of support column.

    2. Fixing details, bolt type, grade and size and PCD.

    3. Minimum foundation size (length, breadth and depth).

    4. Downward reaction.

    5. Turning moment acting on foundation at effective radius.

  12. If wall or column mounting jib crane:

    1. Type of bracket and fixing details.

    2. Maximum reaction on top bracket.

    3. Maximum reaction on bottom bracket.

  13. Environmental conditions, e.g. indoor or outdoor, use within corrosive atmosphere, use in hazardous areas, use with dangerous loads, etc.

  14. Details of finish, e.g. any special paint or protective finish required, taking into account the risks that may require distinctive colours.

  15. Any special conditions or technical requirements, e.g. flame proofed.

  16. Full installation and maintenance instructions.

Note

  1. Items 11 and 12 are given by the supplier to enable the qualified engineer referred to in 10.5.2 Selection of Jib Crane (1) and (2) to confirm the suitability of fixings and complete the foundation details.

  2. Current standards for jib cranes use a classification system. If the classification is not known, then sufficient information must be given for the supplier to determine the classification. The following is required:

    1. Utilization

      1. Number of lifts per hour.

      2. Operating hours per day.

      3. Operating hours per month.

    2. Loadings

      1. Number of lifts at full load.

      2. Number of lifts at 75% of full load.

      3. Number of lifts at 50% of full load.

      4. Number of lifts at 25% of full load.

    3. Weight of lifting appliance if known.

    4. Intended design life in years.

Where insufficient detailed information is available, the user should seek the suppliers advice and recommendations as to the most suitable crane. Any restrictions or recommendations on the use must be adhered to.