Storage area and stacking of bags: 1 من أصل 2
To determine the storage area on which to stack fertilizers, one starts from a basic unit which is one fertilizer bag. The bag may vary in its dimensions according to the product it contains. But all bags have a uniform weight of 50 kg, with average dimensions of 92 cm x 60 cm & 15 cm, as already stated. Based on this average size, the most practical methods of stacking are outlined below.
To keep the fertilizers in an orderly fashion in the store, the bags should be property stacked. For easier understanding, the different layers of the stack, their arrangement and their dimensions, are described below.
Firstly, the base of the stack has to be laid down, that is to say the area occupied by a certain number of conveniently placed bags, in the form of 3 side-by-side and 2 at right angles (the first layer) as shown in figure 46 as may be seen in this diagram, it is recommended that a space of l cm be left between each bag to provide ventilation, particularly with ammonium nitrate.
On top of the base (i.e. bottom layer) a second layer is placed with the positioning of the bags changed as shown in the second art of figure 46, and so on, layer by layer, up to a maximum height of 3.10m.
In this case, the five bags in a 2 x 3 arrangement occupy an area of 3.04m2 (1.52m x 2m) a total of twenty layers to a height of 3.10m gives 100 bags. Multiplying 100 by the 50 kg weight per bag, the total comes to 5000 kg or 5 metric tons of fertilizer.