Arthur, Iowa with 1.2 million bu. capacity

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Machinery Journal

RSS By: Aimee Cope, Farm Journal

The Machinery Journal blog is your place to find the latest machinery updates, industry news, and interesting tid bits.

The World’s Largest Free-Span Bin

Jan 27, 2010

Near Arthur, Iowa, Sukup Manufacturing has erected a 135’ diameter, 24-ring commercial grain bin with a maximum capacity of 1.2 million bu.


The peak height measures 131’, and although most bins in this size range have some sort of center support structure the 135’ Sukup roof is supported by a

heavy-duty internal rafter and purlin system, as well as external roof rings. The roof is rated for 30,000 lb. evenly distributed with a 40 psf ground snow load.


The sidewalls on the Sukup 135’ Commercial Bin are beefed up. Laminated sidewall sheet seams ensure a strong bond, and grade 8.2 bolts are used throughout.


In addition to standard full-length stiffeners, the Sukup 135’ Commercial Bin also features intermediate anchor brackets that serve as stiffeners for the bottom ring of the bin and also enable the bin to be unloaded in a single pass. Wind rings provide increased rigidity to the structure when it is empty.

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9:46 AM Jan 28th

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