40x70 Steel Horse Barn

This page is ordered around the stall zone, because at this width the plan has a genuine choice between more stalls and open working space, and that choice governs everything else.

The footprint holds 9 storage bays — 3 across by 3 deep — and leaves 11 feet of depth for a buffer between the stored material and the stall run, which is what keeps dust and traffic out of the occupied end.

Read this footprint through its span. 40 feet across is the fixed constraint; 70 feet of length is the negotiable one, and at 1.75 to 1 the building is long for its width, so movement runs front to back. An empty building looks generous and a working one rarely does; plan against the working state.

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 4 runs of storage bays at 16 ft, leaving 6 ft over — the 6 ft is where the argument about this size actually happens. Storing bulk material in the same building as stalls is common and it is also the arrangement most likely to degrade. Material arrives by vehicle, occupies more space than expected and expands toward the aisle, so the plan's real work is drawing and defending the boundary between the two halves. The number of stalls a barn ends up with is usually one or two more than it was planned for, which is an argument for planning the extendable end deliberately.

At 40x70 the operating question is a specific one: can stored forage, bedding and equipment share this building with stalls without the storage taking the aisle? That is a different question from the one a horse barn of another shape has to answer, and it is why this footprint is planned as a barn combining a stall run with hay, bedding and equipment storage rather than as generic covered area.

The barn arrangement this width and depth could equally carry is a barn planned around stalls with dedicated tack and feed rooms: tack and feed cannot both be enclosed, so one of them is a corner of the aisle and the equipment in it is exposed to dust and weather. Dividing the 2,800 sq ft by the 12 by 16 ft storage bay gives roughly 8 positions before circulation is deducted a second time for cross movement. Whether the plan keeps 8 or drops to 4 comes back to the question this footprint is really answering: can stored forage, bedding and equipment share this building with stalls without the storage taking the aisle?

The 11-foot leftover depth is 440 square feet across the full width — deep enough to plan deliberately, and at this footprint it goes to a buffer between the stored material and the stall run, which is what keeps dust and traffic out of the occupied end. Ground conditions and drainage decide the floor before the frame does.

Spare width is the more valuable of the two leftovers here: a continuous 4-foot strip beats the same area stranded at the end of the run, because it touches every position along the way. Neighbouring buildings, setbacks and the approach road often decide the orientation before the plan does.

Compared with a 40 by 50 of the same width, the extra depth here adds run rather than reach: it buys about 4 storage bays 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 3 storage bays 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. Two traffic patterns overlap: daily handling in the stall run and periodic bulk delivery to the storage end. Giving the storage end its own wide opening keeps the delivery out of the aisle entirely, which is the single most useful decision in this plan. Noise and vibration transmit through a steel frame differently than through a timber one, which is a consideration where the barn is close to occupied buildings. That movement pattern, not the 2,800-square-foot total, is what decides whether the leftover 11 feet is useful here.

Nominal bay division computes to 3 bays at about 23.3 feet, wider than the 12-foot module — so a position can sit inside a bay without a frame line splitting it. The plan should survive the day the largest item the operation owns has to come inside.

With 3 rows deep, the rear row is behind the front one. Without a route past it, those storage bays become storage positions rather than working ones — the real cost of depth at this width. A leftover strip earns its place only when something is deliberately put in it; otherwise it is circulation with a nicer name.

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 86 adds a 5th run of storage bays — useful if the constraint is storage bays rather than the 6 ft already spare at the far end.

Configured as a barn combining a stall run with hay, bedding and equipment storage, 40x70 is judged on whether the 9 storage bays it holds match the operation, and on whether the 4 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?
• How wide is the aisle, and does it work with a horse being led past a barrow?
• Where do feed and tack sit relative to the daily routine?

One opening per position works on this gable: 3 across 40 feet, with 4 feet of wall to distribute as piers. Splitting that margin evenly is what keeps the elevation buildable. What the building holds in its busiest week is the honest brief; the rest of the year is slack.

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 barn storage end planning or delivery access separation should be the first thing reached from the door.

Hay and bedding delivered by vehicle to a door near the storage end, handled by hand or barrow from there.

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. The corner nobody plans for is the one that fills first, which is an argument for planning it.

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 barn storage end planning genuinely needs the extra clear height or only the floor area.

Ventilation across 2,800 square feet at this height: continuous air movement through the aisle and above the stalls is central to how the building works, not an optional extra.

Quantities, not prices, are publishable here: roof cladding runs 2,886 square feet — 3% above the 2,800-square-foot floor at a 3:12 pitch — with 34.6 cubic yards of nominal slab beneath it. Plan the exit as carefully as the entrance; buildings are emptied under more time pressure than they are filled.

The two halves are built to different standards — the stall end fitted, the storage end plain — so the estimate reflects where the dividing line sits more than the total area does.

• the aisle width and the stall count it serves
• ventilation provisions above the stalls
• wash bay drainage and water supply
• interior partitions, stall fronts and durable linings

• 30x40 moves the count from 9 to 4 storage bays (2 across by 2 deep), which is the reason to choose between them.
• 24x50 moves the count from 9 to 6 storage bays (2 across by 3 deep), which is the reason to choose between them.
• 32x40 moves the count from 9 to 4 storage bays (2 across by 2 deep), which is the reason to choose between them.

Because this footprint is planned as a barn combining a stall run with hay, bedding and equipment storage, the useful next reads are different from the ones a differently shaped horse barn suggests: barn storage end planning, delivery access separation, hay and bedding zoning.