a row of ivory hopper bottom smoothwall grain bins against an overcast sky in a yard with gravel in front

Meridian GrainMax® Grain Bins

Meridian Manufacturing: GrainMax® Grain Bins

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Grain storage needs to work throughout the year, not just at harvest. GrainMax® SmoothWall Hopper Bins combine substantial storage capacity with hopper-bottom convenience, providing a versatile storage option for grain farms that value efficient unloading, straightforward cleanout, and flexibility between commodities.

Available in capacities from approximately 1,500 to over 33,000 bushels, GrainMax bins are designed to support a wide range of grain handling requirements. The smoothwall design helps product flow freely while simplifying cleanout compared to traditional corrugated storage, making GrainMax bins a popular choice for farms that store multiple crops throughout the year. Whether adding harvest storage, expanding on-farm capacity, or building a more flexible grain handling system, GrainMax bins provide storage designed to fit the needs of the operation.

Model	Bushels	Cubic Feet	Bin Height	Minimum Auger
12ft Diameter GrainMax – 40 Degree Bottom Cone Available in US Midwest, East and South
1212GM	1448	1704	23’	46’
13ft Diameter GrainMax – 45 Degree Bottom Cone Available in US Midwest, East and South, Eastern Canada
1310GM	1533	1816	22’6”	39’
1315GM	2093	2480	27’6”	53’’
1320GM	2653	3144	32’6”	65’
1325GM	3212	3807	37’6”	65’
1330GM	3772	4471	42’6”	72’
1335GM	4332	5135	47’6”	85’
13.5ft Diameter GrainMax – 40 Degree Bottom Cone Available in US Midwest, East and South, Eastern Canada
1412GM	1881	2213	24’2’’	46’
1420GM	2854	3358	31’10’’	59′
1425GM	3463	4074	36’10’’	65’
1430GM	4071	4790	41’10’’	72’
1435GM	4680	5506	46’10”	85’
14ft Diameter GrainMax – 40 Degree Bottom Cone Available in Western Canada, Northern USA
GM2300	2,301	2,707	26’5″	46’
15.5ft Diameter GrainMax – 40 Degree Bottom Cone Available Montana and other shipping restricted areas
GM3000	3,037	3,573	28’9″	53’
GM4000	3,836	4,514	33’9″	65’
GM5000	4,636	5,455	38’9″	72’
GM6000	5,434	6,394	43’9″	72’
16ft Diameter GrainMax – 40 Degree Bottom Cone Available in Western Canada, Northern USA, US Midwest, East and South (not east of Mississippi)
GM3000	3,264	3840	28’11”	53’
GM4000	4,118	4,845	33’11”	65’
GM5000	4,973	5,851	38’11”	72’
GM6000	5,828	6,856	43’11”	72’
18ft Diameter GrainMax – 40 Degree Bottom Cone Available in Western Canada, Northern USA
GM5300	5,324	6,263	35’6″	65’
GM6400	6,405	7,536	40’6″	72’
GM7500	7,488	8,809	45’6″	79’
20ft Diameter – 40 Degree Bottom Cone Available in Western Canada, Northern USA
2025	8,028	9,445	41’10”	72’
2030	9,361	11,013	46’10”	85’
2035	10,693	12,580	51’10”	95’

Not all sizes available in all regions. Bushel capacities are calculated at 0.849 bushels per cubic foot to account for material compaction.

Standard Features

24” Min. Clearance Under Bottom Slide
27” Spring Loaded Vented Top Lid
Meridian Retractable Ladder with Safety Grip Rung
Powder Coat Finish (Exterior only)
Rack & Pinion Slide Gate with Crank

Common Options (0 selected)

Aeration (vertical, horizontal or 360)
Auger Boot
Fill Indicator
Manways
Pail Spouts
Roof Vents
Sight Gauges (sight glasses, LevALERT®)
Skid Base

FAQ

Both provide hopper-bottom storage, but SmoothWall bins eliminate the corrugations that can trap grain and make cleanout more difficult. For operations that regularly switch between crops, varieties, or storage uses, many producers appreciate the easier cleanout and smooth product flow offered by a SmoothWall design.

Many farms use flat-bottom bins for large-volume storage while using GrainMax bins for commodities that require more frequent movement, cleaner changeovers, or easier access throughout the year. The combination provides both storage capacity and operational flexibility.

GrainMax bins are commonly used for wheat, canola, corn, barley, oats, peas, and other free-flowing agricultural commodities. Many farms also use them when different crops need to be stored and managed separately.

On-farm storage gives producers greater control over harvest logistics and grain movement. Additional storage can help reduce harvest bottlenecks, improve trucking efficiency, and provide flexibility in when grain is delivered or marketed.