flat bottomed silos for maize

flat bottomed silos for maize

Cylinders are made of structural steel with standard Z600 galvanised covering (UNI EN 10346); on request, we can provide thicker galvanised covering. All our silos be configurated depending on the seismic zone, in accordance with the Italian or International Normative (UBC 97) and Traceability Norms UNI EN 1090. Download here the Certificate of Conformity to the EN 1090.


Standard FP silos for maize are equipped with roof hatch to control the stored cereal and an inspection door located usually on the second ring.


FP silos for maize are suitable also for: sunflower, rice and canola.

Capacity [t]
Capacity [m3]
Seismic zone
more info on Seismic zone

Seismic zone

In order to evaluate the structural response of a silo during an earthquake, it’s necessary to know what would be the acceleration affecting the structure during this event. The acceleration depends on different factors, one of which is the acceleration of peak on rigid ground, linked to the probability that the event will occur.

All the different regulations- which are constantly evolving- conventionally classify the territory in zones; nonetheless, when evaluating the response to a seismic event, it’s more advisable to refer to the value of the acceleration of peak on rigid ground which is the reference point of all the regulations and which describes the dangerousness in the event of an earthquake in the installation site.


If we refer to the Italian Normative, for instance, a recent classification is the following:



Seismic Zone


Probability of exceeding


Acceleration on ground [g]*



zone 1

10% in 50 years

> 0,25


zone 2

10% in 50 years

0,15 – 0,25


zone 3

10% in 50 years

0,05 – 0,15


zone 4

10% in 50 years

< 0,05


 * acceleration expressed as fraction of the acceleration of gravity (g)


Values of the acceleration of peak on rigid ground can be read on the seismic normative of the country where the installation will be done; if these data can’t be found from this source, you may take into account the seismic studies carried out in the specific geographic area; nonetheless, it’s essential to verify the reliability of the information gathered. Here you can find some seismic regulations.


Seismic dangerousness is defined by the expected acceleration of peak in a cleared space on a rigid ground with horizontal topographical surface. In case of different grounds or different topographical conditions, it will be necessary to use coefficients which will amplify the actual value of the acceleration. These coefficients must be determined on a case-by-case basis, in accordance with the normative and with the actual features of the ground stated in the geological survey.

Diameter [m]
Rings number
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