Building Types
40x70 Agricultural Steel Building
- Width
- 40 ft
- Length
- 70 ft
- Floor area
- 2,800 sq ft
- Perimeter
- 220 ft
Use
How a 40×70 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
40 ft across the gable end.
Length
70 ft along the sidewall.
Floor area
2,800 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 | 40 ft × 70 ft |
| Floor area | 2,800 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 40 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
40′ × 50′
2,000 sq ft
40′ × 90′
3,600 sq ft
30′ × 70′
2,100 sq ft
Related
Related Building Types
Example configuration — for planning purposes only.
FAQ
Common Questions
40 ft × 70 ft is 2,800 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 40x70 agricultural building planned as implement and towed-equipment storage
This page is ordered around height and clearance, because at 40x70 the 14-foot eave limits a agricultural building sooner than the plan does.
The footprint holds 4 implement positions — 2 across by 2 deep — and leaves 20 feet of depth for a hitch-and-repair space where an implement can be pulled clear of the others and worked on.
Commitment first: 50% of the 2,800 square feet goes to implement positions at 352 square feet each, and 1,360 square feet survives as edge strip. A footprint is worth its own decision when that split lands where the work does. Security and after-hours access are easier to design in the door layout than to bolt on later.
A 40 by 70 footprint is a clearly directional plan: 2,800 sq ft enclosed by 220 ft of wall, at a 1.8:1 length-to-width proportion. Along its 70 ft dimension it takes 3 runs of implement positions at 22 ft, leaving 4 ft over — the 4 ft is where the argument about this size actually happens. Implements are stored, not driven. They arrive on a hitch, sit for most of the year, and leave once. That makes this footprint a question of how many wide, awkward, non-self-propelled items can be backed in and pulled out with a single hitch movement. Neighboring structures already set the yard's traffic pattern, and a new building either respects that pattern or reroutes the whole yard.
At 40x70 the operating question is a specific one: can towed and mounted implements be stored without needing a tractor to move three of them first? 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 implement and towed-equipment 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 40x70 footprint is for this use.
Areas, perimeter, roof area, ridge height, slab volume and the implement position counts on this page are computed from the stored 40x70 record and this platform's planning module for the agricultural building category.
Height
Interior height for a 40x70 agricultural building
Across a 40-foot span the 3:12 pitch adds 5 feet between eave and ridge. The centreline measures 19 feet; anything parked or stacked near a wall lives with the 14-foot eave. Two operations of the same size can want opposite plans, so the arithmetic below is a starting point rather than a recommendation.
Height on a 40 ft span is a separate decision from the 70 ft length, and it is the span that sets the frame's behavior. Raising the eave over 2,800 sq ft affects every bay along the 70 ft dimension, so the test is whether implement storage planning genuinely needs the extra clear height or only the floor area.
Ventilation across 2,800 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 2,800 square feet divides at 40x70
Computed implement position fit for a 40x70 agricultural building
| Measure | Computed at this footprint |
|---|---|
| Implement positions across the 40-foot width | 2 at a 16-foot module |
| Leftover width | 8 ft (560 sq ft as a full-length strip) |
| Rows along the 70-foot length | 2 at a 22-foot module after 6 ft of circulation |
| Leftover depth | 20 ft (800 sq ft across the width) |
| Total implement positions | 4 |
| Share of floor committed | 50% |
Module footprint used here is 16 by 22 feet, this platform's planning module for a agricultural building. It is not a code minimum or an engineered clearance.
Example allocation of the 70-foot length — planning model, not survey data
| Zone | Length along the building | Computed area |
|---|---|---|
| Equipment bays | 42 ft | 1,680 sq ft |
| Material and input storage | 17.5 ft | 700 sq ft |
| Working and turning space | 10.5 ft | 420 sq ft |
Shares applied to the stored 70-foot length; areas computed against the 40-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 implement and towed-equipment storage
The second use this farm footprint tends to absorb is mixed farm utility: the leftover is the buffer that keeps two competing uses from touching, which is a use in itself. Dividing the 2,800 sq ft by the 16 by 22 ft implement position gives roughly 6 positions before circulation is deducted a second time for cross movement. Whether the plan keeps 6 or drops to 3 comes back to the question this footprint is really answering: can towed and mounted implements be stored without needing a tractor to move three of them first?
The 20-foot leftover depth is 800 square feet across the full width — deep enough to plan deliberately, and at this footprint it goes to a hitch-and-repair space where an implement can be pulled clear of the others and worked on. The span is the commitment; everything inside it is rearrangeable later, and the 40-foot dimension is not.
The 8 feet of spare width runs the whole 70-foot length — 560 square feet of wall strip. It earns its keep as shelving, staging or a walking route, not as another implement position. Doors and their approaches decide more about daily use here than the enclosed area does.
Compared with a 40 by 50 of the same width, the extra depth here adds run rather than reach: it buys about 3 implement positions in line, and every position past the second is retrieved by moving what stands in front of it. Spent as a square 53 by 53 instead, the same 2,800 sq ft would stand 2 implement positions across rather than 2, and would trade this plan's length for parallel access. That is the width-against-depth decision this footprint has already made. At this scale the building is usually operated by one or two people who know where everything is, so the plan can be loose and the doors matter more than the divisions. Everything moves under tow, so the internal geometry has to allow a tractor plus implement to turn or reverse. The real constraint is the swept path of the pair, which is always longer than the implement. Ventilation follows what is stored rather than what is built: damp crop, livestock and machinery each want a different air pattern. That movement pattern, not the 2,800-square-foot total, is what decides whether the leftover 20 feet is useful here.
Openings
Openings for 2 implement positions across
One opening per position works on this gable: 2 across 40 feet, with 8 feet of wall to distribute as piers. Splitting that margin evenly is what keeps the elevation buildable. An empty building looks generous and a working one rarely does; plan against the working state.
The 40 ft ends and the 70 ft sides offer very different opening budgets: 40 ft of end wall has room for one wide opening or two modest ones, while 70 ft of side wall can carry several without the openings competing. On this plan the deciding factor is whether implement storage planning or clear-span farm buildings 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 4 implement positions at 40x70
At 23.3-foot nominal bays the structure works with the layout instead of against it: one implement position per bay line, walls free of awkward half-positions. The building is fixed for decades while the operation inside it changes every few years, and the plan has to survive that.
With 2 rows deep, the rear row is behind the front one. Without a route past it, those implement positions become storage positions rather than working ones — the real cost of depth at this width. The floor treatment is a use decision that outlasts most of the equipment standing on it.
Extension is cheapest along the 70 ft dimension, where each added bay repeats work already framed; widening past 40 ft is a different frame rather than a longer one. Growing to 40 by 92 adds a 4th run of implement positions — useful if the constraint is implement positions rather than the 4 ft already spare at the far end.
Configured as implement and towed-equipment storage, 40x70 is judged on whether the 4 implement positions it holds match the operation, and on whether the 8 feet of spare width leaves the route this mode depends on.
- Does the work need three parked lanes, or two lanes and a moving lane wide enough for equipment to pass, or does it need a second lane that this 40-foot span cannot give?
- Is the 70-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?
- 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.
Cost drivers
Quantities that move the estimate at 40x70
The estimate at 40x70 moves with four computed quantities: 2,800 square feet of floor, 220 feet of perimeter, 3,080 square feet of wall and 2,886 square feet of roof. Everything else is site and specification. Ground conditions and drainage decide the floor before the frame does.
The estimate moves with span and door width. Implement storage pushes toward a clear span because interior columns are what makes wide gear unstorable, and toward wide openings for the same reason.
- 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
Comparison
What changes at adjacent footprints
Computed comparison of nearby footprints for a agricultural building
| Footprint | Floor area | Implement positions |
|---|---|---|
| 30x40 | 1,200 sq ft | 2 (2 x 1) |
| 24x50 | 1,200 sq ft | 2 (2 x 1) |
| 32x40 | 1,280 sq ft | 2 (2 x 1) |
| 36x40 | 1,440 sq ft | 3 (3 x 1) |
| 24x60 | 1,440 sq ft | 4 (2 x 2) |
Areas computed from each stored size record; implement position counts computed with the same 16 by 22 foot planning module.
- 30x40 moves the count from 4 to 2 implement positions (2 across by 1 deep), which is the reason to choose between them.
- 24x50 moves the count from 4 to 2 implement positions (2 across by 1 deep), which is the reason to choose between them.
- 32x40 moves the count from 4 to 2 implement positions (2 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 implement positions
| Footprint | Area Δ | % Δ | Implement positions at that footprint | What changes for this use |
|---|---|---|---|---|
| 30x100 | +200 sq ft | +7.1% | 2 (1 x 2) | −2 implement positions on the same planning module. |
| 50x50 | −300 sq ft | −10.7% | 3 (3 x 1) | −1 implement position on the same planning module. |
| 40x80 | +400 sq ft | +14.3% | 4 (2 x 2) | Same implement position count on this planning module; the difference is circulation and stored depth, not capacity. |
| 40x60 | −400 sq ft | −14.3% | 6 (3 x 2) | +2 implement positions on the same planning module. |
Areas are arithmetic on two stored size records; implement position counts use this platform's 16 by 22 foot planning module and are not a capacity statement.
Because this footprint is planned as implement and towed-equipment storage, the useful next reads are different from the ones a differently shaped agricultural building suggests: implement storage planning, clear-span farm buildings, wide equipment openings.
Visualization
Reading the 40x70 footprint as a agricultural building
FAQ
Questions about 40x70 agricultural building projects
About 800 square feet across the width — enough for a hitch-and-repair space where an implement can be pulled clear of the others and worked on.
Reserving 6 ft across the 40 ft dimension for movement leaves 34 ft of working width, which takes 2 implement positions at 16 ft. Along 70 ft it takes 3 runs at 22 ft. That is 6 positions out of 2,800 sq ft, and the remainder is circulation, walls and the margin every plan needs. Whether that count is enough depends on can towed and mounted implements be stored without needing a tractor to move three of them first. These are planning figures computed from the footprint, not a quoted layout.
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 19 feet at the ridge, but the eave is the number that governs anything standing near a wall.
Because towed gear is wide and cannot side-step. A self-propelled machine can be manoeuvred into a tight position; a planter on a hitch has to be backed straight into a space wide enough to receive it.
The footprint holds 4 implement positions — 2 across by 2 deep — and leaves 20 feet of depth for a hitch-and-repair space where an implement can be pulled clear of the others and worked on. Those counts use a 16 by 22 foot planning module with 6 feet allowed for circulation, so a different module changes the answer.
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.
- Implement position fit: Counts, leftover strips and per-module areas are computed from the stored 40x70 record against this platform's 16 by 22 foot planning module for the agricultural building category, with 6 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 70-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.
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 40x70 agricultural building configurations
Review the allocation models for this footprint side by side, then estimate the configuration you intend to build.