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Kingston,Mi | Our strutural and concrete engineer allowed us to design fertilizer secondary containment walls using the modular block. We were allowed to go 2 blocks or 4 ft with out restraint. he calculated the sliding reaction of the concrete block against several surfaces and concluded that the weight of the block was sufficent to prevent sliding when the internal load was water (62.4 pounds/cubic ft.) Recently they have reconsidered that allowance and now require that the bottom block be restrained by at least a ft. of soil, but this is for liquid fertilizer and that weights about 85 pounds/cubic ft. Silage with a density of about 40 pounds/cubic should be safer, that said there are lots of bunk silos for gravel that are higher than 3 or 4 blocks and that material is 110 to 120 pounds/cubic ft.
Most of the modular block silos around this area are backed with earth up to the point where 2 blocks are exposed. Most of these would be 5 blocks high or 10 ft.
As Ben mentioned lining with plastic to reduce air contact certinaly helps. | |
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silage pit
