80x80 Grain Storage Building

No price appears on this page. The quantities that scale an estimate at 80x80 are 6,400 square feet of slab, 79 cubic yards of nominal concrete, 4,480 square feet of wall cladding and 6,597 square feet of roof cladding. Depth is bought cheaply and width expensively, which is why this proportion tends to be argued about before anything else.

The apron, the approach and the slab under repeated axle loading are where the money goes. The enclosure itself is usually the cheaper half of a handling building.

• wall design for product pressure, which is an engineering output
• the opening size the handling equipment needs
• ventilation and monitoring provisions
• the truck apron and turning area

This page is ordered around the floor itself, because at 80x80 the 6,400 sq ft available decides what a grain storage building can hold before any other consideration applies.

The footprint holds 8 loading positions — 4 across by 2 deep — and the remaining 6 feet is marginal: there is no waiting position, so a second vehicle waits in the yard or on the approach and the queue is external.

Read this footprint through its span. 80 feet across is the fixed constraint; 80 feet of length is the negotiable one, and at 1 to 1 the building is close to square, so movement runs in both directions. The corner nobody plans for is the one that fills first, which is an argument for planning it.

A 80 by 80 footprint is a near-square plan: 6,400 sq ft enclosed by 320 ft of wall, at a 1:1 length-to-width proportion. Along its 80 ft dimension it takes 2 runs of loading positions at 28 ft, leaving 24 ft over — the 24 ft is where the argument about this size actually happens. Taken purely as arithmetic, 80 by 80 gives 3 loading positions across the 80 ft dimension once 18 ft is reserved for movement, and 2 deep along the 80 ft dimension. Run as a a loading and handling building organised around vehicle movement, 11 ft across is below the 12 ft this use needs to be worth planning, so there is no waiting position, so a second vehicle waits in the yard or on the approach and the queue is external Moisture movement through a stored commodity is a management matter determined by the material and the season rather than by the building.

At 80x80 the operating question is a specific one: how many vehicles can be worked at once before the yard rather than the building becomes the constraint? That is a different question from the one a grain storage building of another shape has to answer, and it is why this footprint is planned as a loading and handling building organised around vehicle movement rather than as generic covered area.

The handling pattern this building slips into when the season peaks is a bagged and packaged material store worked in unit loads: there is no staging bay, so inbound pallets are set down in the aisle and checked where they block movement. Positions are laid out against the approach direction rather than against the walls, and everything not directly serving a position — sampling, records, tools — sits outside the movement envelope.

The 6-foot leftover depth falls under the 12 feet this platform treats as usable for a grain storage building, so there is no waiting position, so a second vehicle waits in the yard or on the approach and the queue is external. What the building holds in its busiest week is the honest brief; the rest of the year is slack.

The 12 feet of spare width runs the whole 80-foot length — 960 square feet of wall strip. It earns its keep as shelving, staging or a walking route, not as another loading position. Plan the exit as carefully as the entrance; buildings are emptied under more time pressure than they are filled.

The longest internal travel on a 80 by 80 plan is about 113 ft corner to corner, and the shortest useful one is the 80 ft cross-run. For a a loading and handling building organised around vehicle movement that matters where loading building planning sits, because shortening the 80 ft run to serve it lengthens every trip along the 80 ft dimension. The approach road and turning area decide how large a vehicle can serve the building, which quietly limits the whole operation. That movement pattern, not the 6,400-square-foot total, is what decides whether the leftover 6 feet is useful here.

Nominal bay division computes to 4 bays at about 20 feet, wider than the 17-foot module — so a position can sit inside a bay without a frame line splitting it. Interior divisions are the last decision that should be fixed, because they are the first one that usually changes.

Two-plus rows change the access question entirely. Every rear position at 80x80 needs either its own opening or an aisle, and 12 feet of spare width is what that aisle has to come from. Utilities entering on the wrong elevation quietly rewrite the interior layout.

Handling buildings extend by adding a parallel lane rather than by lengthening one. A longer lane adds travel, not throughput.

Configured as a loading and handling building organised around vehicle movement, 80x80 is judged on whether the 8 loading positions it holds match the operation, and on whether the 12 feet of spare width leaves the route this mode depends on.

• Does the work need racking or work zones on both sides with a full vehicle lane down the middle, or does it need a second lane that this 80-foot span cannot give?
• Is the 80-foot length being bought for depth, or for the repeated bays — six to eight repeated bays, and the bay line becomes the organising device for the whole plan?
• How is product moved in and out, and does the opening suit that equipment?
• Has wall loading from stored product been raised with the manufacturer as an engineering item?

The 80-foot gable can carry 4 openings, one per loading position, with 12 feet of wall left for piers between and beside them — the arrangement that keeps each position independently reachable. Long spans buy flexibility that is only worth paying for if the operation actually changes shape.

Opening height and alignment govern everything. Two aligned openings turn the building into a lane; one opening turns every visit into a reverse, whatever the interior looks like.

Machine handling at one end with a clear path to the pile, and product moved rather than carried.

Across a 80-foot span the 3:12 pitch adds 10 feet between eave and ridge. The centreline measures 24 feet; anything parked or stacked near a wall lives with the 14-foot eave. Insulating later is possible; framing for insulation later is much harder.

Height on a 80 ft span is a separate decision from the 80 ft length, and it is the span that sets the frame's behavior. Raising the eave over 6,400 sq ft affects every bay along the 80 ft dimension, so the test is whether loading building planning genuinely needs the extra clear height or only the floor area.

Ventilation across 6,400 square feet at this height: stored product needs air movement and monitoring, which makes ventilation a stored-quality question rather than a comfort one.

• 40x70 moves the count from 8 to 4 loading positions (2 across by 2 deep), which is the reason to choose between them.
• 30x100 moves the count from 8 to 12 loading positions (2 across by 6 deep), which is the reason to choose between them.
• 50x60 moves the count from 8 to 6 loading positions (3 across by 2 deep), which is the reason to choose between them.

Because this footprint is planned as a loading and handling building organised around vehicle movement, the useful next reads are different from the ones a differently shaped grain storage building suggests: loading building planning, vehicle turnaround, aligned opening planning.