Avonlea Recommendations/Preparing Your Storage System Site





  1. Choose a location that is on high ground without any natural drainage running through.
  2. Remove any topsoil and organic material from where your bins will be placed. Topsoil has a weight bearing capacity of only 200-500 lbs/ sq ft.
  3. Twister recommends a minimum soil weight bearing capacity of 3000 lbs/sq. ft under bin foundations. This is for bins that are placed on an adequate concrete base (see Avonlea recommendations under concrete & rebar section).
  4. Avonlea recommends a minimum soil weight bearing capacity of 5000 lbs/sq. ft under hopper bins which are using a skid foundation. It is very important for the site to be well drained as excess moisture can cause a soft spot in the soil resulting in bin tipover.
  5. Approximate soil weight bearing capacities (lbs/sq.ft) are as follows:
    1. Soft unpacked clay less than 2000lb
    2. Packed clay 3000-4000lb
    3. Packed sandy clay 4000-6000lb
    4. Well packed gravel 6000-8000lb
  6. Remember 6 inches of well packed gravel on top of 1 foot of unpacked clay is a recipe for disaster.
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