WORKING LOAD determination for an capacity [m
3
] : ............................ TABLE 1
TABLE 2: Typical material densities-loose
attachment: Determining the degree of degree of filling [kg/m
3
]
• Determine the capacity of an excavator
degree of filling : x ............................ filling of an excavator in respect of Basalt 1960
bucket according to ISO 7451 (head 1:1). bucket 1:1 content Bauxite, kaolin 1420
For a grab, the capacity is determined spec. weight [kg/m
3
] : x ............................ Drag Shovel & Ditcher Bucket Clay
according to SAE J67 sand; loose clay / loam [A] 100 % natural bed 1660
• Correct the capacity of an excavator (not
tot. working load [kg] : ............................ mixed soil [A] 100 % dry 1480
applicable to a grab) according to a degree solid; hard clay [B] 85 % wet 1660
of filling, see table 1 gravel; rubble [C] 75 % Clay and gravel
• Determine the specific weight of the
broken rock [C] 75 % dry 1420
material to be shifted, see table 2 silt; mud [-] 60 % wet 1540
• Subsequently calculate the working load
boulders [-] 60 % Decomposed rock
Drag Shovel - Rubble Bucket [D] 60 % 75 % rock, 25 % earth 1960
TABLE 3: determining factor (F) for the lifting capacity of an excavator 50 % rock, 50 % earth 1720
RANGE: CENTRE OF GRAVITY-DISTANCE: D [m] 25 % rock, 75 % earth 1570
R [m]
0 0,25 0,5 0,75 1 1,25 1,5 1,75 2 2,5 3 3,5 4
Earth
4 1.00 1.06 1.13 1.19 1.25 1.31 1.38 1.44 1.50 1.63 1.75 1.88 2,00 dry, packed 1510
4,5 1.00 1.06 1.11 1.17 1.22 1.28 1.33 1.39 1.44 1.56 1.67 1.78 1.89 wet, excavated 1600
5 1.00 1.05 1.10 1.15 1.20 1.25 1.30 1.35 1.40 1.50 1.60 1.70 1.80 Granite
5,5 1.00 1.05 1.09 1.14 1,18 1.23 1.27 1.32 1.36 1.45 1.55 1.64 1.73 broken 1660
6 1.00 1.04 1.08 1.13 1.17 1.21 1.25 1.29 1.33 1.42 1.50 1.58 1.67 Gravel
6,5 1.00 1.04 1.08 1.12 1.15 1.19 1.23 1.27 1.31 1.38 1.46 1.54 1.62 pitrun 1930
7 1.00 1.04 1.07 1.11 1.14 1.18 1.21 1.25 1.29 1.36 1.43 1.50 1.57 dry 1510
7,5 1.00 1.03 1.07 1.10 1.13 1.17 1.19 1.23 1.27 1.33 1.40 1.47 1.53 dry, 6 - 50 mm 1690
8 1.00 1.03 1.06 1.09 1,13 1.16 1.18 1.22 1.25 1.31 1.38 1.44 1.50 wet, 6 - 50 mm 2020
8,5 1.00 1.03 1.06 1.09 1.12 1.15 1.18 1.21 1.24 1.29 1.35 1.41 1.47 Gypsum
9 1.00 1.03 1.06 1.08 1.11 1.14 1.17 1.19 1.22 1.28 1.33 1.39 1,44 broken 1810
9,5 1.00 1.03 1.05 1.08 1.11 1.13 1.16 1.18 1.21 1.26 1.32 1.37 1.42 crushed 1600
10 1.00 1.03 1.05 1.08 1.10 1.13 1.15 1.18 1.20 1.25 1.30 1.35 1.40 Limestone
10,5 1.00 1.02 1.05 1.07 1.10 1.12 1.15 1.17 1.19 1.24 1.29 1.33 1.38 broken 1540
11 1.00 1.02 1.05 1.07 1.09 1.11 1.14 1.16 1.18 1.23 1.27 1.32 1.36 crushed 1540
11,5 1.00 1.02 1.04 1.07 1.09 1.11 1.13 1.15 1.17 1.22 1.26 1.30 1.35 Sand
12 1.00 1.02 1.04 1.06 1.08 1.10 1.13 1.15 1.17 1.21 1.25 1.29 1.33 dry, loose 1420
12,5 1.00 1.02 1.04 1.06 1.08 1.10 1.12 1.14 1.16 1.20 1.24 1.28 1.32 damp 1690
13 1.00 1.02 1.04 1.06 1.08 1.10 1.12 1.13 1.15 1.19 1.23 1.27 1.31 wet 1840
13,5 1.00 1.02 1.04 1.06 1.07 1.09 1.11 1.13 1.15 1.19 1.22 1.26 1.30 Sand and clay
14 1.00 1.02 1.04 1.05 1.07 1.09 1.11 1.13 1.14 1.18 1.21 1.25 1.29 loose 1600
14,5 1.00 1.02 1.03 1.05 1.07 1.09 1.10 1.12 1.14 1.17 1.21 1.24 1.28 Sand and gravel
15 1.00 1.02 1.03 1.05 1.07 1.08 1.10 1.12 1.13 1.17 1.20 1.23 1.27 dry 1720
15,5 1.00 1.02 1.03 1.05 1.06 1.08 1.10 1.11 1.13 1.16 1.19 1.23 1.26 wet 2020
16 1.00 1.02 1.03 1.05 1.06 1.08 1.09 1.11 1.13 1.16 1.19 1.22 1.25 Sandstone 1510
16,5 1.00 1.02 1.03 1.05 1.06 1.08 1.09 1.11 1.12 1.15 1.18 1.21 1.24 Shale 1250
17 1.00 1.01 1.03 1.04 1.06 1.07 1.09 1.10 1.12 1.15 1.18 1.21 1.24 Slag
17,5 1.00 1.01 1.03 1.04 1.06 1.07 1.09 1.10 1.11 1.14 1.17 1.20 1.23 broken 1750
18 1.00 1.01 1.03 1.04 1.06 1.07 1.08 1.10 1.11 1.14 1.17 1.19 1.22 Stone
factor F = (R+D)/R crushed 1600
A
B
C
D
To Previous Page