Grain Systems Inc - GSI Group

Model 4002 - Unstiffened Bins



In 1972, the first GSI bin featured a 2.66” corrugation, unstiffened bin design. This proven design has continued to evolve and grow for today’s operations, and features our precision roll-forming process corrugates accurate sidewall sheets every time. This process assures a tighter fit and increased weather protection.  With the original 2.66” corrugation profile, the 4002 is the perfect bin to maintain a historic look and consistent bin height.

  • Diameters: 15' - 48'
  • Peak Load (LBS): 6,000 LBS
  • Snow Load: 30 PSF
  • Dome Cap: STANDARD
  • Flat Top: Optional
  • Door: 2-Ring Door Standard
  • Temp Cable Brackets: Optional 24' - 48'


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Each GSI bin is efficiently designed to handle maximum loads for unmatched strength. Most sidewall sheets are manufactured from high-tensile steel that is rated at 70,000 psi (480MPa) or greater.

Walk-Through Bin Doors

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Walk-Through bin doors are standard on all 40-Series grain bins. All inner door panels on GSI’s walk-through doors open completely. There are no horizontal bars or braces to unbolt or remove, so opening is quick and easy. No wrenches or tools are required to operate.

Roof Panels

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The new 40-Series roof panels incorporate a 3” tall rib with over and under lap profiles ensuring a precise fit. 3 bend rib profiles are also incorporated in the new design for increased strength to stand up even in the harshest of environments.


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We have a full line of bin-unloading solutions with horizontal, 25 degree, and vertical discharge options. Carry in or integrated power sweep, we have what you need to get your bin unloaded

Cut-Lok Floor

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The Cut-Lock steel floor is efficiently designed with a 12% opening that prevents any restrictions to air flow. Check out our complete lineup of floors.

One size does not fit all when it comes to storing grain, and that’s why GSI features over 85 versions of the 4002 Unstiffened, 2.66' Corrugated grain bin. With the ability to hold anywhere from 11,000 bushels to 74,000 bushels, our full line of grain bins are customized to fit your needs and maximize your profitability.

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