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24x30 Metal Building

Width
24 ft
Length
30 ft
Floor area
720 sq ft
Perimeter
108 ft
24x30 Metal Building example configuration
Example configuration — for planning purposes only.
Last updated Aug 26, 2026Reviewed under the Find Steel Buildings editorial standards

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24′ × 30′ ✓
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Footprint

Understanding the 24×30 Footprint

A 24′ × 30′ building covers 720 square feet with a 108 ft perimeter. Width is normally the harder dimension to change later, so it is worth settling first.

30′ length24′ width720 sq ft
Footprint drawn to the stated dimensions.Platform calculation
12′ eave15′ ridge3:12 pitch · 24′ clear span
Gable cross section at the stated eave height and roof pitch.Platform calculation

Space planning

What Can Fit in This Size?

  • Floor area

    720 sq ft of clear floor before any interior partitions.

  • Along the width

    24 ft across sets how much can be placed side by side and how wide an opening can be.

  • Along the length

    30 ft of length is normally divided into structural bays, which affects where partitions land.

  • Height

    At a 12 ft eave the ridge reaches about 15 ft at a 3:12 pitch, which sets practical door height.

Commonly considered

Building Types Commonly Considered at This Size

A useful starting point rather than a recommendation — the right type depends on how the building will be used.

Proportion

Why a 24×30 behaves the way it does

24 ft of span and 30 ft of length are two different purchases, and at this footprint they do not carry equal weight.

Two-vehicle width with a working depth behind it. The 6 ft of extra length over 24x24 is exactly the strip most buyers find missing in a square two-car plan.

The tradeoff. It solves the two-car-plus-storage problem at the smallest possible increment, which also means there is little slack left for a third use.

Plan drawn to the stated dimensions.

Fit

What actually fits at 24×30

Planning guidance for early-stage layout, not a specification.

  • Two vehicles with a storage or bench strip across the back wall
  • One vehicle plus a substantial shop area
  • Household storage that does not compete with parking
  • Garage

    Two vehicles with usable back-of-shop space.

  • Workshop

    Very common — parking plus a real bench run.

  • Storage

    Rear strip absorbs seasonal and household storage.

  • Barn

    Small-holding tack and feed storage at the domestic end of the range.

Access and growth

Openings and expansion on a 24×30 shell

  • Where the openings land

    Two single doors in the 24 ft end wall preserve the back strip; a single wide door and a side entry gives more flexibility for one large vehicle.

  • If it has to grow later

    Further depth is the natural direction; the 24 ft span stays sensible up to considerable lengths before circulation suffers.

Building types

Building types planned at 24×30

Each guide covers how that type is configured; the footprint page stays about the footprint.

Alternatives

24×30 against the footprints buyers weigh it against

Each alternative is a page in its own right, with its own proportion reasoning.

Where cost is handled

This page does not price the building

Dimensions and layout are settled here. What a building costs depends on specification, site and supply, so cost is handled in its own silo rather than estimated from a footprint.

See how steel building cost is broken down

Access

Planning the Openings & Access

  • Opening width

    Door width is limited by the wall it sits in and by the frame; it is confirmed with the supplier for the final design.

  • Opening placement

    Gable-end and sidewall openings lead to different interior circulation at the same footprint.

  • Walk doors and windows

    Personnel access and daylight are positioned so they do not conflict with the large openings.

Comparison

Compare Nearby Sizes

24′ × 30

720 sq ft

24′ × 24

576 sq ft

Difference: 144 sq ft (25% more floor area in the larger footprint). Drawn to the same scale from the stated dimensions.

24′ × 30

720 sq ft

30′ × 40

1,200 sq ft

Difference: 480 sq ft (67% more floor area in the larger footprint). Drawn to the same scale from the stated dimensions.

Computed from exact dimensions

Dimensional summary

Dimensional data

Width24 ft
Length30 ft
Floor area720 sq ft
Perimeter108 ft
Eave height12 ft
Ridge height15 ft3:12 pitch
Wall area (gross)1,368 sq ft
Roof area742 sq ft×1.031 slope
Slab volume8.9 cu yd4" nominal
Clear spanYes — no interior columns

Methodology

Floor area is width × length. Roof area applies the slope factor for the stated pitch to the footprint and excludes overhangs. Gross wall area includes the gable end triangles and does not deduct door or window openings. Slab volume is nominal at the stated thickness and excludes footings and thickened edges.

Fit

Building types that suit a 24x30 footprint

Nothing rates as an unqualified fit at twenty-four by thirty feet; every option asks for one trade-off, usually against the span. A footprint never settles a building type by itself — what it settles is which of the twenty-four-foot span, the thirty-foot run or the twelve-foot eave has to move when the use changes. Here that is decided by the fact that the plan can be rearranged along its length, but the cross-section is settled by the width, while an office fits in a rear corner, but it removes the only quiet corner the plan has. Is the 30-foot length being bought for depth, or for the repeated bays — two or three frame bays, which is enough rhythm to line up a partition on? Two footprints can enclose the same area and behave nothing alike, because the proportion decides where routes, benches and storage can physically go.

  • Barndominium at 24x30
  • Metal Garage at 24x30
  • Agricultural Building at 24x30
  • Workshop at 24x30
  • Commercial Building at 24x30
  • Storage Building at 24x30

Cost drivers

Which quantities move a 24x30 estimate

No price appears on this page. What the stored record supports is which quantities an estimate scales with at twenty-four by thirty feet: 720 sq ft of slab, 8.9 cu yd of nominal concrete, 1,296 sq ft of wall surface, 742 sq ft of roof surface and 108 ft of perimeter. At 2.83 sq ft of skin per sq ft of floor this footprint is skin-heavy, so cladding, insulation and trim decisions outweigh floor decisions. Raising the twelve-foot eave moves wall area alone; adding a bay of roughly 15 ft to the run moves wall, roof and slab together, which is why two or three frame bays, which is enough rhythm to line up a partition on is a budget statement as well as a layout one — and why the plan can be rearranged along its length, but the cross-section is settled by the width belongs in the same conversation as the quantities. Usable floor is always less than enclosed floor once doors swing, racking sits off the wall and a route is kept clear from the entrance to the far end.

Why we don't quote thisWe do not state 24x30 pricing here, because it varies too much to give an honest figure. A price figure is published on this platform only with a documented inclusion basis, a collection date and a named source.

Planning summary

What a 24x30 metal building actually gives you

A 24x30 metal building encloses 720 sq ft on a clear span of twenty-four feet running thirty feet deep — a near-square footprint with only a slight long axis to zone along this platform records in the small class. Read as two separate purchases, that is wide single-lane width across and short depth down the run: twenty-four feet of span buys one generous vehicle lane plus a walking route that does not brush the sidewall, and thirty feet of depth means two or three frame bays, which is enough rhythm to line up a partition on. Neither statement follows from the 720 sq ft total, In exact terms, dividing twenty-four feet of span by a nominal twelve-foot vehicle lane leaves two lanes and no remainder, so the span is fully committed to lanes and any circulation has to be taken out of one of them, and thirty feet of run divides into two nominal bays at about 15 ft, which is a tighter division than the twenty-five-foot module, so each bay carries slightly less depth than the count suggests. That is why area alone is a poor way to choose between footprints. The cheapest square footage in any quote is the footage that was never needed: a programme written down honestly usually shrinks before it grows.

Planning assumptionPlatform calculation

Every quantity here is computed from one stored record — twenty-four feet of width, thirty feet of length, a twelve-foot eave, a 3:12 pitch and a 4 in nominal slab — and the planning language is keyed to wide single-lane width paired with short depth, where one generous vehicle lane plus a walking route that does not brush the sidewall and short enough that everything inside is visible and reachable from the entrance. The cheapest square footage in any quote is the footage that was never needed: a programme written down honestly usually shrinks before it grows.

Computed quantities for a 24x30 footprint

Floor area720 sq ft24 x 30
Perimeter108 ftgrade detailing and trim length
Wall area1,296 sq ftperimeter x 12 ft eave
Roof area742 sq ft3:12 slope factor applied, overhangs excluded
Ridge height15 ftsymmetrical gable assumed
Slab volume8.9 cu yd4 in nominal thickness, no thickened edges
Nominal bays2 at ~15 ftdivision of the stored length
Enclosure ratio2.83 : 1skin area per sq ft of floor
Proportion1.25:1length to width
Footprint shapecompact / near-squareWall runs are close to equal, so no single elevation is the obvious place for access and the plan is balanced rather than sequential.

Geometry

Why 24 ft of span and 30 ft of depth are different purchases

Span buys cross-section. At twenty-four feet that means one generous vehicle lane plus a walking route that does not brush the sidewall, so one lane with a usable wall zone on one side for storage or a bench line, and circulation runs down one side, which keeps the opposite wall available for fixed storage. Precisely, dividing twenty-four feet of span by a nominal twelve-foot vehicle lane leaves two lanes and no remainder, so the span is fully committed to lanes and any circulation has to be taken out of one of them. The consequence for the thirty-foot direction is immediate: because the plan can be rearranged along its length, but the cross-section is settled by the width, later change has to happen along the length, where two or three frame bays, which is enough rhythm to line up a partition on and a shallow rear strip can be given to storage without cutting into the work zone. A twenty-four-foot span therefore sets the ceiling on how far 720 sq ft can be re-thought after the frame is ordered. Equipment dimensions beat rules of thumb: the machine, vehicle or implement that has to fit should be measured, including the room it needs to be worked around.

How each dimension of a 24x30 footprint changes the plan

VariableSpan — 24 ftDepth — 30 ft
Working roomone generous vehicle lane plus a walking route that does not brush the sidewallshort enough that everything inside is visible and reachable from the entrance
Structureone lane with a usable wall zone on one side for storage or a bench linetwo or three frame bays, which is enough rhythm to line up a partition on
Openingsone main gable door plus a separate walk door is the practical arrangement at this widtha second opening on the far gable is more about ventilation and daylight than about driving through
Circulation and storagecirculation runs down one side, which keeps the opposite wall available for fixed storagea shallow rear strip can be given to storage without cutting into the work zone
Later changethe plan can be rearranged along its length, but the cross-section is settled by the widthan office fits in a rear corner, but it removes the only quiet corner the plan has

Planning behaviour derived from the stored dimensions. No structural capacity or code requirement is implied.

What decides it

The opening decides the building — the decision a 24x30 footprint really turns on

On a small footprint the opening is a large fraction of one wall, so its position is not a detail but the plan itself. Where it lands decides which wall can carry shelving, where daylight falls, which corner is dead and whether anything wheeled can be brought in without a three-point turn outside.

  • Fix the approach outside before the opening inside — turning room governs door position
  • Decide which wall is being sacrificed to the opening and confirm the remaining walls carry the programme
  • Check the swing or travel of the door against what will be stored beside it
  • Separate daily access from occasional access if the main opening is slow to operate
Planning assumptionPlanning guidance

This theme is editorial planning judgement selected for footprints of this scale and proportion. It states no requirement, no clearance, no capacity and no cost, and it does not replace the design professional's determination for a specific project. Where a decision can be deferred cheaply, defer it; where deferring means cutting into finished steel or concrete later, settle it before the order.

Use profile and layouts

Realistic ways to plan 720 sq ft at 24x30

Two arrangements survive a span of twenty-four feet at thirty feet of depth: single-trade workshop, vehicle garage. The others are ruled out by geometry rather than by taste, because a 1.25:1 plan offering one generous vehicle lane plus a walking route that does not brush the sidewall while a shallow rear strip can be given to storage without cutting into the work zone cannot host every programme. Each allocation below divides the stored thirty-foot length only; the twenty-four-foot direction is fixed and carries one main gable door plus a separate walk door is the practical arrangement at this width. Where a decision can be deferred cheaply, defer it; where deferring means cutting into finished steel or concrete later, settle it before the order.

Machine and bench perimeter12 × 24 ft · 288 sq ftClear working centre12.6 × 24 ft · 302.4 sq ftMaterial staging5.4 × 24 ft · 129.6 sq ft30 ft overall length
Single-trade workshop — example allocation of the 30 ft length
Parking18.6 × 24 ft · 446.4 sq ftTool wall and access6.9 × 24 ft · 165.6 sq ftSeasonal storage4.5 × 24 ft · 108 sq ft30 ft overall length
Vehicle garage — example allocation of the 30 ft length

Use profile for a 24x30 footprint

UsePlanning fitWhy, at this geometry
Vehicle and equipment storageWORKABLE24 feet of width gives one generous vehicle lane plus a walking route that does not brush the sidewall, which is what decides how many units park without blocking each other.
Workshop and trade shopWORKABLEA workshop needs a clear centre; at 24 x 30 feet circulation runs down one side, which keeps the opposite wall available for fixed storage.
Agricultural and implement storagePOORImplements are limited by turning and hitching room rather than parked footprint, so the 24-foot width matters more than the 720 square feet.
Equine and livestockPOORStalls, an aisle and a working area need both width and a long run; this footprint offers short enough that everything inside is visible and reachable from the entrance.
Residential or mixed usePOORA divided plan needs enough depth to separate conditioned from working space; an office fits in a rear corner, but it removes the only quiet corner the plan has.
Light commercial and serviceCONDITIONALPublic and service traffic need separate openings, and one main gable door plus a separate walk door is the practical arrangement at this width.
Racked warehousing and distributionPOORRack runs plus a handling lane need a span this platform records as wide single-lane width; the lane cannot be narrowed once racking is set.
Aviation and oversized doorsPOORDoor width and clear height dominate here; the stored record for this footprint carries a 12-foot eave.

STRONG: suits the footprint without compromise. WORKABLE: fits with one trade-off. CONDITIONAL: only with a trimmed programme. POOR: a different footprint is the better answer. Planning judgement only — no structural feasibility or permit outcome is implied.

Planning assumptionPlanning guidance

The allocations above are arithmetic on thirty feet of stored length, published as example models for wide single-lane width. They are not recommendations, not survey findings and not a claim about what buyers most often choose, and they assume the cross-section stays as recorded: one lane with a usable wall zone on one side for storage or a bench line. Equipment dimensions beat rules of thumb: the machine, vehicle or implement that has to fit should be measured, including the room it needs to be worked around.

Openings

Bay lines and door placement on a 24x30 shell

One lane with a usable wall zone on one side for storage or a bench line, while along the length two or three frame bays, which is enough rhythm to line up a partition on, and in exact terms thirty feet of run divides into two nominal bays at about 15 ft, which is a tighter division than the twenty-five-foot module, so each bay carries slightly less depth than the count suggests. Anything permanent — a partition, a rack run, a mezzanine edge, a floor joint, a secondary door — is cheapest on one of those lines. Which line gets it follows from the cross-section as much as the run: a shallow rear strip can be given to storage without cutting into the work zone, while across the span one lane with a usable wall zone on one side for storage or a bench line. Site constraints often decide more than the footprint does — approach, turning, drainage fall and the position of the utility connection all shape which arrangement is buildable.

  • Gable-end access on the twenty-four-foot wall — leaves the thirty-foot run uninterrupted and suits one generous vehicle lane plus a walking route that does not brush the sidewall
  • Sidewall access on the thirty-foot wall — struck on one of two bay lines at roughly 15 ft, where a shallow rear strip can be given to storage without cutting into the work zone
  • Aligned openings at both gable ends — a second opening on the far gable is more about ventilation and daylight than about driving through
  • A walk door independent of the main opening, so daily access does not depend on operating a large door
Planning assumptionPlanning guidance

Achievable door sizes, header details and framed-opening dimensions on a shell of twenty-four by thirty feet come from the selected door system and the manufacturer's engineering for that building; nothing above states an achievable opening. What the stored record does support is that one main gable door plus a separate walk door is the practical arrangement at this width, and that a second opening on the far gable is more about ventilation and daylight than about driving through. Two footprints can enclose the same area and behave nothing alike, because the proportion decides where routes, benches and storage can physically go.

Comparison

24x30 against its closest alternatives

Computed comparison against the alternatives closest to 24x30

FootprintFloor areaDifferenceProportionPerimeter
24x30720 sq ft1.25:1108 ft
16x40640 sq ft-80 sq ft2.5:1112 ft
24x24576 sq ft-144 sq ft1:196 ft
25x30750 sq ft+30 sq ft1.2:1110 ft

Areas, proportions and perimeters computed from each stored size record.

Stepping down from 24x30 lands on 16x40 at 640 sq ft. The reduction costs 8 ft of span, which is where the lane arrangement lives, so the two-bay rhythm this footprint is planned around does not survive the change intact, and one lane with a usable wall zone on one side for storage or a bench line would have to be re-tested against the smaller shell. Order of work matters: openings, interior partitions and slab jointing are cheap while they are still drawings and expensive once the frame is standing.

Exact difference between 24x30 and each nearby recorded footprint

FootprintFloor areaWidth ΔLength ΔArea ΔWhat the change actually does
25x30750 sq ft+1 ft±0 ft+30 sq ft (+4.2%)Keeps the run and adds 1 ft of span. Every frame in the building changes, and the 30 sq ft gained is width across the plan rather than depth along it.
16x40640 sq ft−8 ft+10 ft−80 sq ft (−11.1%)The next smaller recorded footprint: 80 sq ft less floor with 8 ft less span and 10 ft less length.
20x30600 sq ft−4 ft±0 ft−120 sq ft (−16.7%)Keeps the run and removes 4 ft of span. This is the direction no later rearrangement recovers, because interior width cannot be added after the frame is ordered.
24x36864 sq ft±0 ft+6 ft+144 sq ft (+20%)Adds 6 ft of length on an unchanged span, which is 144 sq ft of floor without altering any cross-section decision — the same lanes, the same working width, the same endwall opening to divide.
24x24576 sq ft±0 ft−6 ft−144 sq ft (−20%)Removes 6 ft of length on an unchanged span. The cross-section is identical; what disappears is 144 sq ft at the far end, which is normally where a rear or support zone would have sat.

Foundation

Foundation questions a 24x30 footprint raises

Over 720 sq ft the nominal slab volume computes to 8.9 cu yd at 4 in, before thickened edges, piers or haunches. The figure to hand over with it is 0.150 ft of perimeter per sq ft of floor, because on twenty-four by thirty feet the edge forming and anchor setting follow the 108 ft perimeter rather than the area — high enough here that edge work is a substantial share of the concrete scope. Given that thirty feet of run divides into two nominal bays at about 15 ft, which is a tighter division than the twenty-five-foot module, so each bay carries slightly less depth than the count suggests, joints are worth striking on those bay lines so the floor shares the frame's grain, particularly where a shallow rear strip can be given to storage without cutting into the work zone and circulation runs down one side, which keeps the opposite wall available for fixed storage. Where a decision can be deferred cheaply, defer it; where deferring means cutting into finished steel or concrete later, settle it before the order.

Planning assumptionEngineering-required

Reinforcement, thickness, footing depth and anchor design under a twenty-four by thirty foot frame are engineering outputs for one site and soil condition, produced from the manufacturer's anchor reactions; the 4 in figure above is the stored nominal thickness only. Joint positions relative to the two bay lines remain a planning choice. Site constraints often decide more than the footprint does — approach, turning, drainage fall and the position of the utility connection all shape which arrangement is buildable.

Height

Interior height across a 24 ft span

A twelve-foot eave under a 3:12 roof computes to 15 ft at the ridge, so height across twenty-four feet of span is a profile rather than a single figure. The extra 3.0 ft sits over the centreline, exactly where circulation runs down one side, which keeps the opposite wall available for fixed storage — usable volume, rarely usable working height. The open question at this footprint is whether the eave quietly rules out equipment nobody has specified yet, because span cannot compensate for height, and it is settled together with the run, where short enough that everything inside is visible and reachable from the entrance. Equipment dimensions beat rules of thumb: the machine, vehicle or implement that has to fit should be measured, including the room it needs to be worked around.

Planning assumptionPlanning guidance

Clear height below purlins, bracing and lighting is less than the twelve-foot eave. The reduction follows from the framing selected for a twenty-four-foot span and is confirmed with the manufacturer rather than assumed here. Nothing on this page states a clear height, a purlin depth or a capacity for a twenty-four by thirty foot frame. A footprint that suits the first use and cannot suit the second is a short-term purchase; the cheapest flexibility is bought in the original span and eave, not in later alterations.

FAQ

Questions buyers ask about 24x30 buildings

Usually, yes. Two buildings with the same enclosed area behave completely differently depending on which wall is opened and where. On a footprint of this size the opening consumes a meaningful share of one elevation, so it determines the usable wall, the approach and the dead corner all at once.

720 sq ft, computed as 24 ft by 30 ft. That is gross enclosed area on a 1.25:1 plan. Usable area is lower: circulation runs down one side, which keeps the opposite wall available for fixed storage, and short enough that everything inside is visible and reachable from the entrance. an office fits in a rear corner, but it removes the only quiet corner the plan has, which is the allocation buyers most often forget when they compare totals. Site constraints often decide more than the footprint does — approach, turning, drainage fall and the position of the utility connection all shape which arrangement is buildable.

On this platform's planning profile for a 24 ft span at 30 ft deep, the strongest fit is vehicle and equipment storage, with vehicle and equipment storage and workshop and trade shop workable. The reasoning is geometric: across the span you get one generous vehicle lane plus a walking route that does not brush the sidewall, and along the run two or three frame bays, which is enough rhythm to line up a partition on. A footprint that suits the first use and cannot suit the second is a short-term purchase; the cheapest flexibility is bought in the original span and eave, not in later alterations.

2 nominal divisions at roughly 15 ft, computed from the stored 30 ft length. A shallow rear strip can be given to storage without cutting into the work zone, and partitions, rack lines or a second door land cheapest on those 2 lines rather than between them. Order of work matters: openings, interior partitions and slab jointing are cheap while they are still drawings and expensive once the frame is standing.

It is one of two arrangements this footprint supports: one continuous working floor with machines against the walls and the centre kept clear. Allocated across thirty feet that is 12 ft machine and bench perimeter, 12.6 ft clear working centre, 5.4 ft material staging, and the cross-section behind it is that one generous vehicle lane plus a walking route that does not brush the sidewall. What goes wrong is that the clear centre disappears first; once it is used for storage the workshop stops working. Usable floor is always less than enclosed floor once doors swing, racking sits off the wall and a route is kept clear from the entrance to the far end.

15 ft, computed from the stored 12 ft eave and a 3:12 pitch on a symmetrical gable. The extra 3.0 ft sits over the centreline of the 24 ft span, where circulation runs down one side, which keeps the opposite wall available for fixed storage — so doors and equipment are checked against the eave, not the ridge. Two footprints can enclose the same area and behave nothing alike, because the proportion decides where routes, benches and storage can physically go.

Methodology

How the figures on this page were produced

Sources and methodology

Verified sourceExternal factual sources
  • 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.

Platform calculationComputed on this platform
  • 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.
Planning assumptionPlanning assumptions
  • 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.

Front third240 sq ftCenter third240 sq ftRear third240 sq ft24′ × 30′ floor plate
Computed from stored dimensions
Floor plate divided into equal thirds along the length; each area is computed from the stored footprint.Platform calculation
2 bays @ 15frame lines shown at each column
Computed from stored dimensions
Frame bay layout — column lines computed from the 30′ length.Platform calculation

Drawn to one scale

How it compares

24×20′ · 480 sq ft24×30′ · 720 sq ft24×40′ · 960 sq ft
Computed from stored dimensions
Adjacent footprints on the standard 10-foot length ladder, drawn to one scale.Platform calculation

Estimate a 24x30 building

Work from the stored dimensions of this footprint, then compare it against the sizes either side of it before you request quotes.

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