Building Types
50x120 Agricultural Steel Building
- Width
- 50 ft
- Length
- 120 ft
- Floor area
- 6,000 sq ft
- Perimeter
- 340 ft
Use
How a 50×120 Agricultural Building May Be Used
Equipment storage
Machinery clearance height and door width are usually the limiting factors, not floor area.
Hay storage
Bulk storage depth against the sidewalls affects how the building is loaded and unloaded.
Livestock shelter
End-to-end access lets equipment pass through without reversing.
Example
Example Configuration
Quick dimensions
At a Glance
Width
50 ft across the gable end.
Length
120 ft along the sidewall.
Floor area
6,000 sq ft of clear floor.
Eave height
14 ft at the sidewall on the stored profile.
Configuration
How This Building Is Configured
Steel structures for equipment, hay, livestock and general farm storage.
Configuration summary
| Building type | Agricultural Building |
|---|---|
| Footprint | 50 ft × 120 ft |
| Floor area | 6,000 sq ft |
| Eave height | 14 ft |
Planning
Footprint & Space Planning
Footprint
Width and length are chosen together: width is usually fixed by what has to fit side by side, length by how many bays are needed.
Height
Eave height affects door options, storage height and how open the interior feels.
Access
Where vehicles and people enter changes the whole interior layout, so access is settled before anything else.
Doors and openings
Opening width, height and position are specified with the supplier; they affect the frame and the wall bracing.
Site
Slope, drainage, access for delivery and erection, and the foundation are confirmed for the actual property.
Expansion
Extending along the length is usually simpler than changing the width later, which is worth deciding up front.
Access
Doors & Access Considerations
Opening width
Across a 50 ft gable end, the practical opening width is limited by the frame and confirmed with the supplier.
Opening height
A 14 ft eave sets the ceiling on door height before any frame change.
Drive-through
Matching openings at both ends avoid reversing, at the cost of usable wall.
Similar sizes
Other Sizes for a Agricultural Building
50′ × 100′
5,000 sq ft
50′ × 140′
7,000 sq ft
40′ × 120′
4,800 sq ft
Related
Related Building Types
Example configuration — for planning purposes only.
FAQ
Common Questions
50 ft × 120 ft is 6,000 square feet of floor area before any interior partitions.
Length is usually adjusted in bay increments, and width is a larger design change. Both are confirmed with the supplier for the final design.
Site preparation, foundation and erection are commonly quoted separately from the building package. Confirm the scope of any quote you receive.
Compare nearby sizes
Related footprints for this building type
Each page works through one footprint for one building type.
Overview
A 50x120 agricultural building planned as mixed machinery and commodity storage
This page is ordered around height and clearance, because at 50x120 the 14-foot eave limits a agricultural building sooner than the plan does.
The footprint holds 6 shared bays — 2 across by 3 deep — and leaves 24 feet of depth for a buffer bay between the machinery end and the stored commodity, which is the divide that stops one contaminating the other.
Read this footprint through its span. 50 feet across is the fixed constraint; 120 feet of length is the negotiable one, and at 2.4 to 1 the building is long for its width, so movement runs front to back. The building is fixed for decades while the operation inside it changes every few years, and the plan has to survive that.
A 50 by 120 footprint is a long corridor of a plan: 6,000 sq ft enclosed by 340 ft of wall, at a 2.4:1 length-to-width proportion. Along its 120 ft dimension it takes 4 runs of shared bays at 28 ft, leaving 8 ft over — the 8 ft is where the argument about this size actually happens. Taken purely as arithmetic, 50 by 120 gives 1 shared bays across the 50 ft dimension once 12 ft is reserved for movement, and 4 deep along the 120 ft dimension. Run as a mixed machinery and commodity storage, 18 ft across is enough to be worth planning: a buffer bay between the machinery end and the stored commodity, which is the divide that stops one contaminating the other Mixed use is the norm rather than the exception; the useful question is which use gets the good access and which one takes what is left.
At 50x120 the operating question is a specific one: can machinery and stored crop share one roof without the crop losing condition or the machines losing access? That is a different question from the one a agricultural building of another shape has to answer, and it is why this footprint is planned as mixed machinery and commodity storage rather than as generic covered area.
Read this page as a use page, not a construction page. Agricultural building is a use category on this platform, not a construction method: it covers farm buildings by what they hold and how the operation runs, and the same use can be built as a clear-span steel frame, a post-frame building or another system. The question it answers is how useful a 50x120 footprint is for this use.
Areas, perimeter, roof area, ridge height, slab volume and the shared bay counts on this page are computed from the stored 50x120 record and this platform's planning module for the agricultural building category.
Height
Interior height for a 50x120 agricultural building
Span drives headroom at 50x120: 50 feet of width on a 3:12 pitch puts 20.3 feet over the middle and 14 feet at the walls, so where a tall item stands matters as much as how tall it is. Neighbouring buildings, setbacks and the approach road often decide the orientation before the plan does.
Two uses give two height drivers — a raised loader on one side, stacked or piled material on the other — and the eave follows the taller of them across the whole building.
Ventilation across 6,000 square feet at this height: farm storage brings moisture in with it: green hay, wet machinery and any animals all release it, so ridge-to-eave airflow is a planning priority and a tightly sealed building is usually the wrong instinct here.
Clear height below purlins, bracing and lighting is lower than the eave height. The usable figure comes from the manufacturer's framing for the selected building.
Usable area
How the 6,000 square feet divides at 50x120
Computed shared bay fit for a 50x120 agricultural building
| Measure | Computed at this footprint |
|---|---|
| Shared bays across the 50-foot width | 2 at a 20-foot module |
| Leftover width | 10 ft (1,200 sq ft as a full-length strip) |
| Rows along the 120-foot length | 3 at a 28-foot module after 12 ft of circulation |
| Leftover depth | 24 ft (1,200 sq ft across the width) |
| Total shared bays | 6 |
| Share of floor committed | 56% |
Module footprint used here is 20 by 28 feet, this platform's planning module for a agricultural building. It is not a code minimum or an engineered clearance.
Example allocation of the 120-foot length — planning model, not survey data
| Zone | Length along the building | Computed area |
|---|---|---|
| Equipment bays | 72 ft | 3,600 sq ft |
| Material and input storage | 30 ft | 1,500 sq ft |
| Working and turning space | 18 ft | 900 sq ft |
Shares applied to the stored 120-foot length; areas computed against the 50-foot width.
Module footprints and allocation shares come from this platform's use typology and are published as example planning models. They are not recommendations and do not describe a majority of projects.
Allocation
Dividing the floor for mixed machinery and commodity storage
The second use this farm footprint tends to absorb is seasonal and commodity storage: the leftover is taken by the loader working the pile face and cannot be assigned to anything else. The floor divides into a machinery end with door access and a commodity end that is deliberately harder to reach, with a buffer between them. The buffer is the plan's working part, not its waste.
Because 24 feet clears the 14 feet this platform treats as usable, the end of the run is a room rather than a gap: 1,200 square feet for a buffer bay between the machinery end and the stored commodity, which is the divide that stops one contaminating the other. The floor treatment is a use decision that outlasts most of the equipment standing on it.
Spare width is the more valuable of the two leftovers here: a continuous 10-foot strip beats the same area stranded at the end of the run, because it touches every position along the way. Two operations of the same size can want opposite plans, so the arithmetic below is a starting point rather than a recommendation.
Compared with a 50 by 90 of the same width, the extra depth here adds run rather than reach: it buys about 4 shared bays in line, and every position past the second is retrieved by moving what stands in front of it. Spent as a square 77 by 77 instead, the same 6,000 sq ft would stand 3 shared bays across rather than 1, and would trade this plan's length for parallel access. That is the width-against-depth decision this footprint has already made. At this size the building becomes a shared resource, and shared resources need a written rule for who parks where and which door is kept clear. The longest internal travel on a 50 by 120 plan is about 130 ft corner to corner, and the shortest useful one is the 50 ft cross-run. For a mixed machinery and commodity storage that matters where mixed farm storage sits, because shortening the 50 ft run to serve it lengthens every trip along the 120 ft dimension. Vermin, birds and dust are planned for at the eave and the base or they are dealt with for the life of the building. That movement pattern, not the 6,000-square-foot total, is what decides whether the leftover 24 feet is useful here.
Openings
Openings for 2 shared bays across
The 50-foot gable can carry 2 openings, one per shared bay, with 10 feet of wall left for piers between and beside them — the arrangement that keeps each position independently reachable. The plan should survive the day the largest item the operation owns has to come inside.
The 50 ft ends and the 120 ft sides offer very different opening budgets: 50 ft of end wall has room for one wide opening or two modest ones, while 120 ft of side wall can carry several without the openings competing. On this plan the deciding factor is whether mixed farm storage or crop and machinery separation should be the first thing reached from the door.
Loading is done by machine from the apron, so the surface outside the door does as much work as the floor inside.
Framed-opening sizes, headers and the structure around them are engineered for the specific building. Confirm every opening with the door supplier and the building manufacturer before ordering.
Configurations
Configuring 6 shared bays at 50x120
Nominal bay division computes to 5 bays at about 24 feet, wider than the 20-foot module — so a position can sit inside a bay without a frame line splitting it. An empty building looks generous and a working one rarely does; plan against the working state.
Two-plus rows change the access question entirely. Every rear position at 50x120 needs either its own opening or an aisle, and 10 feet of spare width is what that aisle has to come from. Ground conditions and drainage decide the floor before the frame does.
Extension is cheapest along the 120 ft dimension, where each added bay repeats work already framed; widening past 50 ft is a different frame rather than a longer one. Growing to 50 by 148 adds a 5th run of shared bays — useful if the constraint is shared bays rather than the 8 ft already spare at the far end.
Configured as mixed machinery and commodity storage, 50x120 is judged on whether the 6 shared bays it holds match the operation, and on whether the 10 feet of spare width leaves the route this mode depends on.
- Does the work need three lanes and a working lane, or two lanes with an interior work hall between them, or does it need a second lane that this 50-foot span cannot give?
- Is the 120-foot length being bought for depth, or for the repeated bays — a long repeating bay sequence, so segment boundaries are set by bay lines rather than by walls?
- What is the widest implement that has to come in fully assembled, and does it ever come in with an operator in a hurry?
- Does the building need a drive-through route, or is single-end access acceptable?
Bay division shown here is a planning module computed from the stored length. Actual bay spacing is set by the manufacturer's frame design for the building.
Comparison
What changes at adjacent footprints
Computed comparison of nearby footprints for a agricultural building
| Footprint | Floor area | Shared bays |
|---|---|---|
| 30x80 | 2,400 sq ft | 4 (2 x 2) |
| 40x60 | 2,400 sq ft | 6 (3 x 2) |
| 50x50 | 2,500 sq ft | 3 (3 x 1) |
| 40x70 | 2,800 sq ft | 4 (2 x 2) |
| 30x100 | 3,000 sq ft | 2 (1 x 2) |
Areas computed from each stored size record; shared bay counts computed with the same 20 by 28 foot planning module.
- 30x80 moves the count from 6 to 4 shared bays (2 across by 2 deep), which is the reason to choose between them.
- 40x60 holds the same 6 shared bays but changes the leftover depth by -18 feet, which is where the difference is actually felt.
- 50x50 moves the count from 6 to 3 shared bays (3 across by 1 deep), which is the reason to choose between them.
Nearby footprints read for a agricultural building: exact change in area and in planning shared bays
| Footprint | Area Δ | % Δ | Shared bays at that footprint | What changes for this use |
|---|---|---|---|---|
| 80x80 | +400 sq ft | +6.7% | 6 (3 x 2) | Same shared bay count on this planning module; the difference is circulation and stored depth, not capacity. |
| 50x100 | −1,000 sq ft | −16.7% | 6 (3 x 2) | Same shared bay count on this planning module; the difference is circulation and stored depth, not capacity. |
| 60x120 | +1,200 sq ft | +20% | 9 (3 x 3) | +3 shared bays on the same planning module. |
| 40x120 | −1,200 sq ft | −20% | 3 (1 x 3) | −3 shared bays on the same planning module. |
Areas are arithmetic on two stored size records; shared bay counts use this platform's 20 by 28 foot planning module and are not a capacity statement.
Because this footprint is planned as mixed machinery and commodity storage, the useful next reads are different from the ones a differently shaped agricultural building suggests: mixed farm storage, crop and machinery separation, farm building zoning.
Visualization
Reading the 50x120 footprint as a agricultural building
FAQ
Questions about 50x120 agricultural building projects
Farm buildings grow because the operation changes: length is added along the sidewall, open bays are enclosed when the use narrows, and interior partitions are moved far more often than the shell is altered Practically, the 120-foot dimension is the one that extends; the 50-foot span is fixed once the frames are set.
Reserving 12 ft across the 50 ft dimension for movement leaves 38 ft of working width, which takes 1 shared bays at 20 ft. Along 120 ft it takes 4 runs at 28 ft. That is 4 positions out of 6,000 sq ft, and the remainder is circulation, walls and the margin every plan needs. Whether that count is enough depends on can machinery and stored crop share one roof without the crop losing condition or the machines losing access. These are planning figures computed from the footprint, not a quoted layout.
About 1,200 square feet across the width — enough for a buffer bay between the machinery end and the stored commodity, which is the divide that stops one contaminating the other.
Usually a physical divide plus separate access, rather than a line on a plan. Ventilation and dust behave differently on each side, which is the practical reason the divide has to be real.
It depends on the tallest machine as it actually arrives — loader arm part-raised, folded implement up — rather than the machine at rest. The stored configuration computes to 20.3 feet at the ridge, but the eave is the number that governs anything standing near a wall.
Methodology
How this page was produced
Sources and methodology
Find Steel Buildings dimensional records
Find Steel Buildings · Primary platform dataset · Tier 1 — code authority, standards body, primary dataset or manufacturer engineering
Supports: Stored nominal width, length, eave height, roof pitch and slab thickness for this subject.
International Building Code and International Residential Code
International Code Council · Model code · Tier 1 — code authority, standards body, primary dataset or manufacturer engineering
Supports: The framework of adopted codes and local amendments that decides permitting, separation and opening requirements. Cited as the governing framework, never as a local requirement.
- Dimensional figures: Width, length, eave height, roof pitch and nominal slab thickness come from this platform's stored record for the subject. Floor area, perimeter, wall area, roof area, ridge height and slab volume are computed from those inputs rather than transcribed.
- Shared bay fit: Counts, leftover strips and per-module areas are computed from the stored 50x120 record against this platform's 20 by 28 foot planning module for the agricultural building category, with 12 feet allowed for circulation. The module is editorial planning typology, not a code minimum or an engineered clearance.
- Allocation model: Zone shares come from this platform's use typology for agricultural equipment and crop shelter and are applied arithmetically to the stored 120-foot length.
- Allocation and layout models: Layout splits are arithmetic on the stored footprint, published as example allocation models. They are not survey findings and do not describe what buyers most often choose.
- Clearance and opening guidance: Clearance and opening statements are planning guidance. Final dimensions depend on the selected door system, header detail and the manufacturer's engineering for the building.
Methodology notes
- Prices: No price figure appears on this page. Cost data is published on this platform only with a documented inclusion basis, a collection date and a named source.
Cost drivers
Quantities that move the estimate at 50x120
No price appears on this page. The quantities that scale an estimate at 50x120 are 6,000 square feet of slab, 74.1 cubic yards of nominal concrete, 4,760 square feet of wall cladding and 6,185 square feet of roof cladding. A leftover strip earns its place only when something is deliberately put in it; otherwise it is circulation with a nicer name.
Interior division and door count move the estimate more than the shell does at this footprint. Anything stored in bulk against a wall is an engineering input for the specific building rather than a finish choice.
- the clear width the widest fully assembled implement needs
- whether the floor is left as dirt or gravel, partly concreted for the working end, or fully slabbed
- how many bays stay open for machinery and how many are enclosed for inputs
- the apron and yard surface machinery turns on
- interior partitioning between feed, tool and machinery zones
Drawn to scale
Plans and dimensions
Every drawing below is generated from the exact dimensions for this building, so proportions and areas are accurate.
Continue your research
Related planning topics
Background reading on the questions this page raises. None of these pages sells anything.
Compare 50x120 agricultural building configurations
Review the allocation models for this footprint side by side, then estimate the configuration you intend to build.