Temporary exhibitions are where museums and galleries spend the most money and the least time. Loans are booked, crates are booked, install crews are booked — and yet the plan on the wall often changes after the first crate is opened, because something that looked fine on a sketch does not work once real objects, real plinths and real visitor paths are in the room.

Most of those late changes are layout problems, not design problems. Sightlines to a hero work, the width of an ADA route, where loan crates can stage without blocking egress, whether a freestanding wall leaves enough clear aisle: all of these can be tested on paper, and lightly in 3D cutaway, before anything leaves the warehouse. The goal is not a prettier drawing. The goal is fewer surprises on install week.

Start from an accurate gallery footprint

Brochure plans, old CAD exports and phone photos of a previous hang are poor bases for a new show. Wall thicknesses are simplified, column locations drift, and door swings are often missing. Before you invent a layout, get a footprint you trust.

Walk the room with a laser measure or a carefully checked tape. Note clear wall lengths between openings, the true position of columns and HVAC returns, ceiling heights where hanging systems or temporary walls will meet the structure, and the swing of every door that must stay usable during the run. Mark fixed electrical and data points if media works are part of the checklist. If what you have on file is only a scan of an old plan or a photo of a marked-up print, tools such as FloorAI can turn that image into a clean, editable plan quickly, which you then correct against your own measurements. The point is a shared file that registrars, designers, facilities and security can all read the same way.

List what cannot move

Every gallery has a short list of immovable facts. Write them down before anyone draws a wall:

• Structure and utilities. Columns, load-bearing walls, sprinkler lines, permanent hanging tracks and climate returns stay where they are. Temporary walls and cases work around them.


• Egress and life safety. Exit paths, exit signs and fire extinguisher access are not design options. A beautiful cul-de-sac that traps visitors is a failed layout.


• Access for loans. The route from loading dock to gallery — door widths, elevator size, corner turns — constrains how large crates and how many objects can move on a given day.


• Building rules. Some venues limit freestanding wall height, floor loading for heavy sculpture, or the use of certain fasteners into historic fabric. Confirm these early.

This list becomes the constraint set every option has to satisfy. It also prevents the common mistake of designing a perfect hang that facilities cannot approve.

Write a brief for what the show must do

A checklist of object titles is not a layout brief. Write what the exhibition has to accomplish in space. For example:

• A clear first sightline from the entry to the hero work or key loan


• A visitor path that supports the narrative order without backtracking through a choke point


• An ADA-compliant route through the whole hang (common practice keeps accessible aisles near 36 in / 915 mm clear, and often wider where two-way traffic is expected)


• Staging zones for crates on install and deinstall days that do not block egress


• Security sightlines from fixed cameras and from staff positions to high-value cases


• Enough uninterrupted wall run for multi-panel works, and enough floor for freestanding walls or cases where the narrative needs a break

Hand that brief to everyone who will touch the plan. It turns “put the paintings on the walls” into a set of jobs the layout can pass or fail.

Generate and compare several layouts

The costly habit is to draw one arrangement and defend it. It is far more useful to compare three or four versions of the same footprint and ask which jobs each one does well, and which it gives up.

That used to mean a full round of design fees or late nights in CAD. An AI floor plan generator shortens the early option stage: describe the gallery footprint and the brief in plain language, then review several arrangements before anyone commits ink to the floor. FloorAI’s optimizer can also take an existing plan plus instructions — keep the north wall clear for the loan triptych, add a freestanding wall to break the long vista, leave a crate staging strip by the service door — and return revised layouts you can set side by side. Running the same brief again produces another variation worth arguing about.

Vague prompts produce vague rooms. Specific relationships and fixed points produce options you can actually choose between.

Walk the routes on paper

Before you fall in love with any option, walk it with a pencil:

Visitor path. Trace entry to first stop, through the narrative sequence, to exit. Note where people will cluster in front of a popular work and whether that cluster pinches the aisle behind them.

Sightlines. From the threshold, what is the first object a visitor sees? Does a freestanding wall hide a hero piece until too late, or does it create a useful reveal? Check sightlines between high-value cases for security, not only for drama.

ADA and service routes. Trace a wheelchair path and a stretcher or scissor-lift path if your install needs them. Confirm turning clearances at corners and in front of elevators.

Crate and staging zones. Mark where crates sit on day one and day last. A layout that looks elegant with empty floors often fails when six crates occupy the only wide aisle.

Wall runs versus freestanding walls. Continuous wall is efficient for a linear hang; freestanding walls create rooms inside the room and control sightlines, but they eat floor, complicate egress and need stable footings. Decide which jobs need which, on paper.

Check clearances before you tape the floor

Common practice and loan agreements do the rest of the work. Keep accessible aisles at the widths your venue and local code expect — often about 36 in / 915 mm clear as a baseline for an accessible route, and wider where two-way traffic or waiting groups are likely. Leave breathing room in front of works so viewers do not stand in the only through-path. Confirm case-to-wall and case-to-case gaps that security and conservation have already agreed. Check that temporary walls leave door swings free and that fire egress remains obvious even when a gallery is full.

If a layout only works when every visitor cooperates, it does not work.

See the room lightly in 3D before commit

A 2D plan is excellent for dimensions and weak at showing how a freestanding wall will feel at human height. Before finalizing, turn the preferred option into a simple 3D cutaway. FloorAI’s floor-plan-to-3D step keeps walls, doors and openings as drawn and produces an isometric view that registrars, directors and facilities staff can read without CAD literacy. The question to ask in that view is not “is it beautiful?” but “does the entry still find the hero work, and does the aisle still look walkable?”

These views are especially useful in committee reviews. Many stakeholders struggle with plan symbols; almost everyone can point at a cutaway and say the plinth blocks the door or the long wall feels too empty.

Mark the floor only after the plan holds

Tape, vinyl marks and finally paint or stanchion positions should come after the paper tests, not instead of them. When crates arrive, the install team should be executing a layout that has already survived visitor-path, ADA, egress, staging and security checks — not discovering those problems with an open loan crate in the aisle.

Professionals still matter. A tested plan does not replace a registrar’s loan conditions, a conservator’s light and climate limits, an exhibition designer’s graphic and case detailing, or facilities’ structural sign-off on freestanding walls and floor loads. What it does is make sure those conversations start from a layout that already knows its jobs.

Install week is too late to invent the room

Temporary shows compress time. The cheapest hour in the whole cycle is the one spent comparing layouts while the gallery is still empty. Measure the footprint carefully, write down what cannot move, state what the show must do, compare several options honestly, walk the routes, check clearances, and only then put marks on the floor. When the crates finally arrive, the room should already know where they — and the visitors — are supposed to go.

Mira Ellison writes about exhibition planning and gallery operations for museums and independent spaces.