AS ISO 8813:2021 – Earth-moving machinery —Lift capacity of pipelayers and wheeled tractors or loader sequipped with side boom
AS ISO 8813:2021 – Earth-moving machinery —Lift capacity of pipelayers and wheeled tractors or loader sequipped with side boom.
C) mechanical power to the draw works for the load hoist line and hydraulic cylinder(s) for the boom hoist line;
d) hydraulic cylinders for the load and boom hoist line.
The lift mechanism powers may be subdetined as in 3.14.1 to 3.14.3.
mechanical draw works lift capacity
Lift capacity obtained by applying mechanical power to the load and boom hoist draw works without exceeding tipping load or rope factor.
hydraulic lift capacity
Lilt capacity obtained by applying working circuit pressure to the hydraulically actuated draw works and/or lift cylinder(s) without exceeding the holding circuit pressure in any circuit, the tipping load, or the rope factor.
rope factor lift capacity
LIFt capacity, limited so that the rope (actor is not less than 4, or under special provisions, not less than
2,5. See 6.1.2.
rated lift capacity
Maximum load that can be raised without exceeding the rated tipping load lift capacity, the rated lift mechanism lift capacity, or the rated rope factor lift capacity. See clause 7.
operating mass of the machine
(See definition 2.4 in ISO 6016:1982.)
Note I to entry: Equipment such as dozers and buckets, if included in the manufacturer’s specifscations, are In the transport position recommended by the manufacturer when assessing operating mass.
4 Lift capacity calculations procedure
4.1 Machine preparation
All lift capacity calculations shall be made with adjustable counterweights fully extended and with the machine on a firm level surface.
4.2 Attachment variations
Because of the number of attachment variations possible, the manufacturer shall publish revised lift capacity charts if these variations decrease the machine rated lift capacity by more than S %.
4.3 Tipping load calculation
This calculation Is made, in accordance with 4.3.1 to 22.214.171.124. at a given load overhang position to determine the tipping load. Sufficient load overhang dimensions shall be used to develop the lift capacity chart. See figure 9.
Calculations shall be made at standard machine configuration.
4.32 Wheeled machines
Preliminary calculations shall be made using load overhang lines defined In 3.5 with the machine steered straight ahead, steered fully left, and steered fully right. These preliminary calculations shall be used to select the steering position that results in minimum tipping load. The steering position that results in minimum tipping load for both oscillating axle and non-oscillating axle configurations shall be used to develop the lift capacity chart.
4.3.3 Machines with outriggers
Tipping load calculations for machines equipped with outriggers shall be made to develop lift capacity charts both with and without outriggers being used, in accordance with 126.96.36.199 and 188.8.131.52.
184.108.40.206 When making calculations for machines not using outriggers, the requirements of 4.3.2 apply.
220.127.116.11 When making calculations for machines using outriggers, the steering position that results in minimum tipping load shall be used to develop the lift capacity chart.
4.4 Lift mechanism lift capacIty calculations
This calculation is made at a load overhang to determine the load that can be lifted at the load hook when the load from the lilt mechanism (defined in 3.14) is less than the tipping load. Sufficient load overhang dimensions shall be used to develop the lift capacity chart. See figure 9.
5 Verification testing, test results and vaildatlon of calculations
5.1 Test site
The test site shall consist of a firm and level horizontal concrete, steel or equally firm surface and shall be level within 1 %.
5.1.1 Dead weight test site
The load shall be applied by lifting on a fixed anchor (the dead weight”) and adjusting the lifting force to achieve the balance point.
5.1.2 Live weight test site
The load shall be applied by a weight of known mass (the “live weight”) with the load overhang adjusted to achieve the balance point.
5.2 Test equipment
5.2.1 Force transducer of sufficient capacity or weights of known mass.
5.2.2 Means to measure the load overhang distance.
5.2.3 Means to determine that the lift point line is perpendicular to the ground reference plane.
5.2.4 Means to monitor pressure in all hydraulic circuits that will be under pressure during the lift capacity tests.