4" Corrugated Flat Bottom Bins


Roof Design:

  • Corrugated with 30-degree roof slope on all models
  • 3" high multi-step roof rib 
  • Pre-punched rolled edge flange for 15" round or gooseneck roof vents
  • 40" filler cap opening with remote opener
  • Additional rib stiffeners available for higher snow loads, higher peak loads or temperature cable loads

Ladder Design:

  • Optional outside and inside ladders available
  • Outside ladder includes safety cage for bins 6, 7 and 8 tiers high
  • Outside ladder includes safety cage and platform for bins 9-12 tiers high

Bin Unload:

  • High capacity 11" U-trough unload 
  • 8" or 10" tube unload 
  • 7" power sweep 
  • Large center hopper
  • Pre-positioned intermediate hopper 
  • Incline, vertical or horizontal powerheads available


  • Complete catalogue available as stiffened or unstiffened
  • Roll-formed deep, galvanized lipped hat sections for maximum efficiency
  • Standard stiffeners are 88" and cover two rings; special top stiffeners are shorter to accommodate the wall height
  • All stiffener material is ASTM 653, Grade 50, Class 1


  • A large walk door, 64" x 30", standard on all unstiffened and stiffened bins
  • Three heavy-duty inner panels to allow easy access to the bin
  • A single pin door is used on 15' to 30' bins and a double pin door is used on series 33' and larger
  • Heavy-duty frame maintains the bins side-wall integrity
  • Optional auger chute available in bins up to 7750 bushel (260 m3) capacity

Full Floor Aeration:

  • Easy to install full floor aeration 
  • Available in 18 and 20-gauge 
  • 7" wide lanced planking with 12% open area
  • 13" and 17" floor supports available