80x80 Steel Auto Repair Shop

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. Noise from this floor reaches the office, the neighbours and the yard, and separation is a plan decision.

Per service bay this footprint carries about 640 square feet of enclosed floor against a 336-square-foot module. That ratio, not the total, says whether 80x80 is efficient for a auto repair shop. Temperature swing on a steel shell drives condensation decisions that outrank most layout preferences.

• the number of bay openings
• eave height driven by lift travel
• exhaust extraction and air distribution
• separating a customer area from the working floor

This page is ordered around the floor itself, because at 80x80 the 6,400 sq ft available decides what a auto repair shop can hold before any other consideration applies.

The footprint holds 10 service bays — 5 across by 2 deep — and leaves 18 feet of depth for a shared tyre, wheel and equipment zone at the head of the aisle where both rows can reach it.

Efficiency is the useful number here: 640 square feet of enclosed floor per service bay, against a 336-square-foot module. That is generous — the footprint is doing more than hold modules. Depth is bought cheaply and width expensively, which is why this proportion tends to be argued about before anything else.

Across a 80-foot span carried 80 feet deep, The width supports two facing rows, so bay count roughly doubles for the same length. What doubles with it is the discipline required, because the aisle between the rows is now shared by every vehicle. Throughput is governed by how long a vehicle occupies a position, so the plan is judged on release time rather than on floor area. A shop with no dedicated inspection or write-up position performs that work in a bay, which costs a bay.

This footprint is planned as double-row shop with a centre aisle. At 80 by 80 feet — 6,400 square feet on a 1.00 to 1 plan — Vehicle movement, not floor area, is the limit on throughput. Everything moves through one centre lane. That lane is the constraint on the whole building: if it narrows, the rear bays stop being usable at the moment the shop is busiest.

Across a 80-foot span carried 80 feet deep, The office sits across the head of the aisle, where it controls the single entrance to both rows rather than favouring one. Parts split between the two outer walls, and the duplication that causes is the main hidden cost of the layout. The waiting customer and the moving vehicle want separated routes, and the separation has to exist outside the building as well as inside it.

The 18-foot leftover depth is 1,440 square feet across the full width — deep enough to plan deliberately, and at this footprint it goes to a shared tyre, wheel and equipment zone at the head of the aisle where both rows can reach it. Height is the dimension people regret; it cannot be added later without rebuilding the frame line.

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. A wider bay is a structural decision and a longer bay is a layout decision; the two are often confused.

At 80 by 80 feet — 6,400 square feet on a 1.00 to 1 plan — Vehicle movement, not floor area, is the limit on throughput. Everything moves through one centre lane. That lane is the constraint on the whole building: if it narrows, the rear bays stop being usable at the moment the shop is busiest. That movement pattern, not the 6,400-square-foot total, is what decides whether the leftover 18 feet is useful here.

Nominal bay division computes to 4 bays at about 20 feet, wider than the 14-foot module — so a position can sit inside a bay without a frame line splitting it. Service routes are cheap to plan now and expensive to retrofit through a finished shell.

With 2 rows deep, the rear row is behind the front one. Without a route past it, those service bays become storage positions rather than working ones — the real cost of depth at this width. Every foot of width added multiplies through the roof and the frame; every foot of length mostly adds skin.

The layout grows by lengthening both rows at once, so expansion comes in pairs of bays rather than singly.

Configured as double-row shop with a centre aisle, 80x80 is judged on whether the 10 service 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 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?
• How many bays need their own door for the shop to run at the pace you plan?
• Does the eave height clear a vehicle at full lift travel, not just at ride height?

The 80-foot gable can carry 5 openings, one per service bay, with 10 feet of wall left for piers between and beside them — the arrangement that keeps each position independently reachable. A building that cannot be reversed out of is a building that gets used in one direction only.

A through route along the aisle is feasible if the far gable can take a matching door, and it converts the aisle from a dead end into a circuit.

Span drives headroom at 80x80: 80 feet of width on a 3:12 pitch puts 24 feet over the middle and 14 feet at the walls, so where a tall item stands matters as much as how tall it is. Cleaning, maintenance and inspection all need reach, and reach is planned in the gaps rather than in the modules.

Work-zone depth is squeezed from both sides. Each row gets the distance between wall and aisle, which is why a double-row plan wants a wider building than the bay count alone suggests.

Ventilation across 6,400 square feet at this height: running engines and finishing work mean exhaust extraction and general air movement are planned, not improvised.

• 40x70 moves the count from 10 to 6 service bays (3 across by 2 deep), which is the reason to choose between them.
• 30x100 moves the count from 10 to 6 service bays (2 across by 3 deep), which is the reason to choose between them.
• 50x60 moves the count from 10 to 6 service bays (3 across by 2 deep), which is the reason to choose between them.

Because this footprint is planned as double-row shop with a centre aisle, the useful next reads are different from the ones a differently shaped auto repair shop suggests: double row shop layout, shop centre aisle planning, multi-bay service shop.