AS ISO 8813 pdf download – Earth-moving machinery — Lift capacity of pipelayers and wheeled tractors or loaders equipped with side boom
5.4.1 Lift capacity shall be determined under static conditions.
5.4.2The machine used for the tests shall conform in all significant aspects with the machinespecifications used for calculation.
22.214.171.124 Wheeled machines shall be tested at the steering position that resulted in the minimum tippingload as established in 4.3.2.
126.96.36.199 Machines with outriggers shall be tested with and without the outriggers being used, and in theconfigurations established in 4.3.3.
5.4.3 Tyres on wheeled machines shall be inflated and ballasted in accordance with the manufacturer’srecommendations.
5.4.4Track tension on crawler machines shall be adjusted to the manufacturer’s recommendation.
5.4.5 Prior to test, the machine shall be cleaned, in operating condition, and operated until the engineand lifting component fluids are at normal operating temperatures.
5.4.6 All lifting systems, rope and reeving shall be in accordance with the machine manufacturer’sspecifications. If hydraulic lift mechanisms are used, the working and the holding circuit pressure(s)shall be checked for compliance with the manufacturer’s recommendations.
5.4.7 Safety precautions shall be observed while conducting the tests. This includes following alloperating instructions furnished by the manufacturer of the machine to be tested and the test equipmentused. Means shall be provided to prevent the machine from overturning during the tests but shall notappreciably influence the test results.
5.5 Verifying test methods
5.5.1 All static lift capacity tests shall be run with adjustable counterweights in the extended position.
5.5.2 For dead weight tests, the boom shall be in the prescribed overhang positions to verify thecalculations.The magnitude of the force and the overhang distance that achieves the balance point orthe lift mechanism force limit shall be measured. The load lift line shall be kept vertical within ± 0,25°during the test.
5.5.3 For live weight tests, the load shall be applied by a weight of a known mass and the load overhangbe adjusted to verify the balance point or lift mechanism force limit. The live weight should be kept lessthan 0,5 m from the ground reference plane while conducting the test, to reduce the possibility of themachine overturning.
5.5.4 Pipelayer lift capacity tests shall be conducted at the following overhang positions, if applicable:a) 1,25 m (± 10 %) or at minimum overhang distance obtainable if greater than 1,25 m;
b)within 1 m of the maximum load overhang distance;
c)if the lift mechanism lift capacity is reached before the tipping load, that load shall be used in
place of b).
5.5.5 Wheeled machine lift capacity tests shall be conducted at the following load overhang positions,if applicable:
a) 1,25 m (± 10 %) or at minimum overhang obtainable if greater than 1,25 m;b)mid-range load overhang;
c)within 1 m of the maximum load overhang;
d) if the lift mechanism lift capacity is reached before the tipping load, that load shall be used in place
of b) or c).
5.5.6Machines equipped with outriggers shall be tested both without outriggers being used and withoutriggers being used in their most favourable position.
The test results and data from the machine tested shall be recorded on a test summary sheet similar tothat shown as clause 9.
5.7Validation of calculated values
The measured loads at the measured overhang distances should be within 95 % of the calculatedvalues. If not, the calculated values shall be adjusted based on a correction factor determined from themeasured values.
6Performance requirements6.1Rope factor
6.1.1 Rated lift capacity shall not create a rope factor (as defined in 3.11), for ropes that wind on drumsor pass over sheaves, that is less than 4 unless the special provisions of 6.1.2 are applied.The rope factorshall be determined based on the manufacturer’s approved rope, reeving, the nominal breaking strengthof new rope, and with load and boom stationary.
6.1.2 When the rated lift capacity creates a rope factor for ropes that wind on drums or pass oversheaves exceeding 2,5 but less than 4, the following special provisions shall be met and included in theoperator”s manual:
a) an inspection of the rope and hook shall reveal no deficiencies;
b)the load shall be handled at a speed which minimizes dynamic effects;c)the inspection and lifting shall be made by a competent person.