10.10.1 Pre-use Inspection
In addition to the statutory thorough examination by a Competent Person, slewing jib cranes should be visually inspected by a suitably qualified and experienced person prior to use or on a regular basis. For jibs in regular use it is good practice to make the inspection at the start of each shift or working day. For jibs used infrequently it should be done before use on each day of use.
It is recommended that a formal system of pre-use inspection is implemented, and a written record kept identifying the date inspected, confirmation that it passed inspection and the name and signature of the person making the inspection. In the event that it does not pass inspection, there should be procedure to quarantine the jib to prevent further use of the equipment until the problem has been resolved.
The purpose of the pre-use inspection is to check functionality of the jib and make a visual check for any obvious defects. The inspection should include the fixings and anchoring devices and extend to the hoist, trolley and any associated power feed system, further guidance for which is given in the appropriate sections of this code.
The following are examples of common defects of the crane and structure which may become apparent in use or during the regular inspection (see also 10.10.2 Interim Inspection). If any of these faults are found the jib crane should be withdrawn from service and referred to a Competent Person.
Any signs of corrosion, damage or deformation of the structure, such as bent or twisted jib arm, distortion of the column, etc.
In the case of wall mounted jibs, any signs of cracking walls or crumbling brickwork, etc.
Damaged or missing end stops. These are safety devices which prevent the trolley, hoist or load colliding with the structure or becoming detached from the jib if travelled to the extremes of the jib arm. Their effectiveness should be confirmed and they should not make contact with trolley wheel flanges. Bolts securing end stops must all be in place and kept fully tightened.
If bolts are loose, missing, corroded or otherwise damaged. Missing or damaged washers including taper washers where appropriate. All bolts and fixing devices used in the construction of the crane and, in the case of column mounted jibs, for erection onto its supporting structure, should be in place and fully tightened.
If foundation bolts are found to be loose, consult manufacturer’s instructions. Some types of foundation bolt require periodic tightening during the initial period of use. If the manufacturer’s instructions do not mention periodic tightening or if the problem recurs, withdraw from service and refer to a Competent Person.
Difficulty in slewing the jib arm or if the jib slews on its own with no load.
If push trolleys run to the end of the jib arm with no load.
If the jib slews on its own when loaded or if the load runs away along the jib arm. If there is difficulty in traversing the load along the jib arm. This may be the result of overloading. Lower and check the load, and if the load is found to be excessive, adjust the load or use an alternative means of lifting. The jib crane should be inspected to ensure no damage has occurred prior to continuing the lift.