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Caluclation Of Load
The correct assessment of the weight of the load to be lifted is essential to the safe performance of the lifting operation. It determines the capacity of the crane to be used, outrigger loadings and the rating of any lifting equipment. The following table is a useful guide to the average weight of different materials, but should be used with caution. Factors such as site conditions, water content and decomposition have an effect on the load. Irregular shapes are also much more difficult to judge than simple shapes, and residues in vessels can alter the calculations.
Estimated Weights of Various Loads
| Material Type |
Weight in kg/m3 |
| Oil |
800 |
| Concrete |
2440 |
| Brickwork |
2000 |
| Water |
1000 |
| Steel |
7700 |
| Cast iron |
7200 |
| Aluminium |
2700 |
| Earth |
1600 |
| Paper |
1120 |
| Copper |
8800 |
| Lead |
11200 |
| Soft Wood |
600 |
| Hard Wood |
800 |
| Green Heart |
1200 |
1000kgs = 1 tonne