80x80 Steel Aircraft Hangar

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. Service routes are cheap to plan now and expensive to retrofit through a finished shell.

A floor sealed and marked for vehicle use, alongside a floor treatment suited to the aircraft, is the distinguishing detail against a hangar built for the aircraft alone.

• the door system type, which drives the end-frame design
• the clear opening width and height the aircraft requires
• the eave height the door opening forces across the frame
• the apron outside the opening

This page is ordered around vehicle bay, because that is the decision this footprint settles first and every later choice follows from it.

The footprint holds 2 shared-use bays — 2 across by 1 deep — and leaves 26 feet of depth for a fixed vehicle bay along one wall, kept entirely outside the aircraft's swept path so the two never compete for the same floor at the same moment.

Efficiency is the useful number here: 3,200 square feet of enclosed floor per shared-use bay, against a 1596-square-foot module. That is generous — the footprint is doing more than hold modules. Interior divisions are the last decision that should be fixed, because they are the first one that usually changes.

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 1 run of shared-use bays at 42 ft, leaving 38 ft over — the 38 ft is where the argument about this size actually happens. Taken purely as arithmetic, 80 by 80 gives 1 shared-use bays across the 80 ft dimension once 12 ft is reserved for movement, and 1 deep along the 80 ft dimension. Run as a a hangar sharing floor between an aircraft and ground vehicles or equipment, 30 ft across is enough to be worth planning: a fixed vehicle bay along one wall, kept entirely outside the aircraft's swept path so the two never compete for the same floor at the same moment The main door and its supporting framing are typically the single largest cost driver relative to a hangar's overall size.

At 80x80 the operating question is a specific one: does the ground vehicle have a position it never has to vacate for the aircraft, or does the floor get renegotiated every time one of them arrives? That is a different question from the one a aircraft hangar of another shape has to answer, and it is why this footprint is planned as a hangar sharing floor between an aircraft and ground vehicles or equipment rather than as generic covered area.

The stored configuration carries a 14-foot eave and computes to 24 feet at the ridge on a 3:12 pitch — a 10-foot rise across 80 feet. Height is therefore not uniform, and the sidewall is the constraint. Height is the dimension people regret; it cannot be added later without rebuilding the frame line.

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 mixed-use hangar planning genuinely needs the extra clear height or only the floor area.

80 ft across takes 2 shared-use bays and leaves 4 ft. Across only 1 rank of depth that leaves nothing spare for racking or a bench; those go outside the shared-use bay positions or not at all.

The gable clears roughly 72 ft after corner framing: one opening, not two. The 80-ft sidewall takes up to 1 openings with piers between, which is where a second entry belongs.

Nothing lands in the middle of a 80-ft clear width. The 1 rank along the 80-ft length are the only fixed geometry the plan has; every other division is furniture.

80 ft divides exactly into 5 bays at 16 ft. Over 6,400 sq ft a single 16-ft grid is the difference between a plan and an accumulation.

26 ft survives at the end of the run — 2,080 sq ft across the full width. That is a zone to name before the frame is ordered, not a leftover to discover after it.

At 14 ft a 24-ft platform across 80 ft would add about 1,920 sq ft. Framing for it now is a drawing change; adding it to a finished frame is a structural one.

Nominal bay division computes to 4 bays at about 20 feet, narrower than the 38-foot module — so frame lines land inside positions and the interior has to be set out from the columns. Long spans buy flexibility that is only worth paying for if the operation actually changes shape.

A single row means nothing is trapped: every position faces the opening directly, which is this footprint's advantage over a deeper building of the same width. Depth is bought cheaply and width expensively, which is why this proportion tends to be argued about before anything else.

The straightforward addition is a lean-to or separate structure for the ground equipment, which returns the whole hangar floor to the aircraft and removes the daily negotiation between the two uses.

Configured as a hangar sharing floor between an aircraft and ground vehicles or equipment, 80x80 is judged on whether the 2 shared-use 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 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?
• Which aircraft dimension governs — wingspan at the opening or tail height?
• Which door system suits the operation, and has the end frame been designed for it?

The 80-foot gable can carry 2 openings, one per shared-use bay, with 4 feet of wall left for piers between and beside them — the arrangement that keeps each position independently reachable. A wider bay is a structural decision and a longer bay is a layout decision; the two are often confused.

A single large door can serve both if the interior arrangement keeps them from queuing behind each other; a separate smaller door for the vehicle bay removes that dependency entirely.

The operation this hangar floor could equally be run as is a shared hangar nesting several aircraft belonging to different owners: there is no rotation lane, so retrieving an aircraft parked toward the back means moving one or more others out of the way first. A fixed vehicle or equipment bay is set outside the aircraft's swept path from the moment the plan is drawn, rather than being wherever space happens to be left once the aircraft is positioned.

Depth arithmetic leaves a working end zone here. 2,080 square feet sits past the last row, which is why 80x80 tends to be planned with a fixed vehicle bay along one wall, kept entirely outside the aircraft's swept path so the two never compete for the same floor at the same moment designed in rather than added later. Utilities entering on the wrong elevation quietly rewrite the interior layout.

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. Insulating later is possible; framing for insulation later is much harder.

At 1:1 the plan is close enough to square that neither width nor depth is doing the arguing; what decides the layout here is where the openings go, because no proportion is forcing a direction on the floor. Spent as a square 80 by 80 instead, the same 6,400 sq ft would stand 1 shared-use 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 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 hangar sharing floor between an aircraft and ground vehicles or equipment that matters where mixed-use hangar planning sits, because shortening the 80 ft run to serve it lengthens every trip along the 80 ft dimension. Ground vehicles and equipment sharing hangar floor with an aircraft need a fixed position outside its swept path, decided at the planning stage rather than negotiated daily. That movement pattern, not the 6,400-square-foot total, is what decides whether the leftover 26 feet is useful here.

• 40x70 moves the count from 2 to 1 shared-use bays (1 across by 1 deep), which is the reason to choose between them.
• 30x100 moves the count from 2 to 0 shared-use bays (0 across by 2 deep), which is the reason to choose between them.
• 50x60 moves the count from 2 to 1 shared-use bays (1 across by 1 deep), which is the reason to choose between them.

Because this footprint is planned as a hangar sharing floor between an aircraft and ground vehicles or equipment, the useful next reads are different from the ones a differently shaped aircraft hangar suggests: mixed-use hangar planning, shared aircraft and vehicle floor, hangar vehicle bay.