Trampoline Park Occupant Load: 500 or 5,000 in the Same Box

A 25,000 sq ft (2,322 m²) trampoline park can hold 500 people or 5,000. The floor plate is identical in both cases. So is the equipment list, the ceiling height and the parking lot outside.

The difference sits in one row of a table in Chapter 10 of the International Building Code. The code does not name trampoline parks. It instructs the building official to assign whichever listed function most nearly resembles the use, then divide floor area by that row’s factor. The gymnasium row and the standing-space row differ by a factor of ten.

That number is not an abstraction. It sets how many exits the box needs, how wide they must be, how much sellable floor the exit aisles consume, and the figure printed on the sign beside the front door. On most projects it is settled at permit intake, months before anyone draws a trampoline.

The equipment never enters the calculation. Neither do the attractions, the party rooms or the pro forma. A trampoline park’s legal capacity is a property of the building and of one conversation with an official, which is why the cheapest moment to influence it is before the lease is signed.

What follows is the decision in the order it actually happens: classification, factor, occupants, inches, doors, discharge, posted sign. Each step produces one number that enters the next.

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1. Classification Comes Before Capacity

Building codes sort every space into an occupancy group, and the group carries its own rulebook for exits, fire protection and signage. For a trampoline hall, the contest is between two groups: Assembly (A) and Business (B).

Section 303.1 of the 2021 International Building Code defines Group A as the gathering of persons for civic, social or religious functions, for recreation, for food or drink consumption, or while awaiting transportation. Section 303.1.1 then draws the line that matters commercially: an assembly tenant space with an occupant load of fewer than 50 persons is classified as Group B.

Read that backwards and the implication is uncomfortable. The Business route is open only to a venue that holds fewer than 50 people at once. No trampoline park with a birthday business, a school-trip market or a weekend queue fits inside that number.

Group A-3 is the sub-group for assembly uses intended for worship, recreation or amusement that are not classified elsewhere. The listed examples include amusement arcades, bowling alleys, dance halls, gymnasiums without spectator seating and indoor tennis courts without spectator seating. A hall of trampoline beds, ninja obstacles and a dodgeball court reads like that list far more than it reads like an office.

What A-3 drags in is the reason owners should care about the label rather than about the label’s name. A-3 brings the posting requirement in Section 1004.9, a stricter exit count than a business suite, and a fire-review conversation that usually pulls in the landlord’s insurer as well as the building department.

The part nobody mentions at site selection: the occupancy group is not chosen by the architect as a design preference. It is agreed with the authority having jurisdiction at intake, and every downstream number in this article inherits it.

Two honest caveats. Jurisdictions do differ, and a venue that adds a bar, a stage or ticketed spectator events can land in a different assembly sub-group. And a mixed box containing a trampoline court, a soft-play area and a café may be evaluated function by function under Section 1004.3, which is not the same exercise as classifying the whole tenancy once.

If the classification is contested, the documents that settle it are the ones on our safety standards page: equipment certificates, test reports and the operator’s written procedures. They answer a different question from the one the building official is asking, and it helps to know that before the meeting.

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2. The Factor Is a Ten-to-One Lever

Section 1004.5 says the occupant load of an area without fixed seating is the floor area divided by the factor assigned to the function in Table 1004.5. Where the intended function is not listed, the building official establishes a function based on the listed function that most nearly resembles it. That sentence is the whole game.

Table 1004.5 offers four rows to which a trampoline hall could plausibly be matched, and they are not close to each other. Note the unit each row uses: gross means the whole floor plate including columns and partitions, while net means the area of the function itself, which is always smaller than the plate.

Applied to one 25,000 sq ft plate, those four rows produce 500, 1,667, 3,571 and 5,000 occupants. The arithmetic is one division, and it is worth writing out because the result is what the rest of the project is built on.

Design occupant load = floor area under consideration ÷ occupant load factor

25,000 sq ft ÷ 50 gross =   500 occupants   (exercise room row)
25,000 sq ft ÷ 15 net   = 1,667 occupants   (assembly, unconcentrated)
25,000 sq ft ÷  7 net   = 3,571 occupants   (assembly, concentrated)
25,000 sq ft ÷  5 net   = 5,000 occupants   (standing space)

The gross row is the only one that can be run straight off the plate. The three net rows divide net area, which is smaller than 25,000 sq ft by an amount that only the drawing knows, because columns, partitions, the café and the circulation all come out first. Treat those three results as ceilings rather than estimates.

Two things follow. A venue’s capacity is decided by which row is chosen, not by how many people it can physically serve. And the difference is large enough to change whether the project is buildable at all: a 40,000 sq ft box at 5 net would be an 8,000-person assembly, a category of building that most mall landlords have never had inside their walls.

That is usually where the negotiation starts. The venue that ends up with a buildable number is the one that arrives with an argument for the exercise-room row, or with an approved actual load, rather than the one that accepts the first number a plan reviewer writes down.

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3. From Occupants to Inches

Occupants become doors through a second set of factors, and this one is short. Section 1005.3.1 sets stair capacity at 0.3 inch (7.6 mm) per occupant. Section 1005.3.2 sets the capacity of every other egress component at 0.2 inch (5.1 mm) per occupant, reduced to 0.15 inch (3.8 mm) where the building is sprinklered throughout and has an emergency voice and alarm system.

Inches are the useful unit here because doors are sold in inches. A 36-inch leaf is the planning unit most fit-outs land on, and its clear width is always less than its nominal width once the frame, the stop and the hardware are counted. Dividing by 36 therefore gives a floor rather than a ceiling, and the real count can only go up.

Read the last row again. At the standing-space factor, a 25,000 sq ft trampoline park would need roughly 28 door leaves of width, and the sprinklered-and-voiced version would still need 21. No operator builds 21 doors into a single tenancy, and no landlord hands over 21 points of egress. That row is not a design constraint; it is a signal that the row cannot be the right one.

At the other end, the exercise-room row asks for three leaves. Three doors is what a mid-sized restaurant has. The gap between three and 28 is the entire financial argument for getting the factor right, and it is settled in a meeting rather than on a drawing.

A second, quieter number lives in the same chapter. Section 1003.2 requires a ceiling height of not less than 7 feet 6 inches (2,286 mm) above the finished floor along the means of egress. A trampoline hall has the volume to satisfy that easily, which is exactly why it gets forgotten where the box pinches: an undersized soffit, a low mezzanine, a service corridor squeezed behind a party room. The clearance is checked along the path, not at the highest point of the room.

The main ceiling is a separate question and a much larger one, because it decides what can be built underneath it. That is covered in the ceiling height guide, which is the right page to read before signing a lease on a box you have only seen empty.

The same municipal arithmetic appears in parking, where the required space count derives from floor area through another table that changes from city to city. Our breakdown of the parking requirement across 90 to 375 spaces uses the same method: find the row, apply it, then see whether the site survives.

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4. Depth Is What Kills the Box

Area sets the occupant load. Shape decides whether the exits can serve it. Two spaces of 40,000 sq ft can behave completely differently: a 200 by 200 ft square and a 100 by 400 ft strip have the same floor area and entirely different egress problems.

The code limits how far a person may travel to reach an exit, and it requires the exits serving a space to be remote from one another so that a single incident cannot block both. I am deliberately not quoting the travel-distance table, because it changes with the code edition and with whether the building is sprinklered, and a wrong number repeated in a business plan is worse than no number. What matters for planning is the consequence: the deeper the box, the more likely you need an exit somewhere in the middle of it.

The middle of the box is where the landlord’s demising walls are, and that is the real constraint. A trampoline park in a former big-box unit usually inherits one public entrance, one service door and a rear corridor. The second remote exit either exists already, or it has to be cut through a wall that belongs to somebody else.

That cut carries three costs, and only one of them is money. The first is construction: a rated opening, a new door assembly and whatever the corridor on the far side needs. The second is consent: the neighbor’s lease, the landlord’s approval and the insurer’s sign-off, which together can run for months. The third is floor area, and it is the one that never appears in a budget.

Sellable area lost to an exit access aisle = aisle width × run length
Capacity lost to that aisle              = lost area ÷ area per attraction
Build-out cost of the lost area          = lost area × cost per sq ft

An aisle that runs 60 ft at 5 ft wide takes 300 sq ft out of the attraction plan. On a 25,000 sq ft plate that is 1.2 percent of the floor, which sounds trivial until it lands in the zone with the highest revenue per square foot. The reason for writing the formula rather than a number is that the number depends on your plan, and any consultant who quotes one before seeing the plan is guessing.

A real box shows what the starting position looks like. A Texas filing registered in February 2026 for an Altitude Trampoline Park at Pioneer Plaza in Arlington describes 31,512 sq ft of tenant up-fit with an estimated cost of $1,200,000, and its scope of work includes interior demolition of the previous tenant’s improvements and partial demolition of structural walls. That is the normal case: you inherit someone else’s exits, someone else’s corridor and someone else’s structural decisions.

Which is why the egress question belongs in the lease exhibit rather than in the construction documents. By the time the drawings are issued, the second exit is either inside your demise or it is a negotiation you have already lost. The inspection regime that follows occupancy is described in our piece on what an inspector asks for, and it assumes the exits were right on day one.

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5. The Posted Number Is the Operating Number

Section 1004.9 requires every room or space that is an assembly occupancy to have its occupant load posted in a conspicuous place near the main exit, on an approved permanent sign maintained by the owner. Most guests never read it. Every fire inspector does, and so does every insurer.

That sign is the ceiling on what the business can sell. A posted 400 means a 500-person corporate buyout is not for sale, however empty the floor looks on a Tuesday. It caps how many birthday parties can overlap in the same hour, how many school groups can be booked on a Friday morning, and how much café seating can be occupied by parents who are not jumping.

Spectators are inside the number. Urban Air’s own FAQ tells guests that, in accordance with local and state regulations, the operator may limit park capacity and that spectators may be restricted, directing them to check with the individual park. The operator treats capacity as a regulatory figure, not a marketing one.

This is the part of the calculation that surprises operators after opening. A ten-jumper party is not a ten-person event. It is ten children plus parents, grandparents and siblings, and all of them are bodies in the space. Three parties running at once with their families can put 80 to 100 people into a building whose posted number was set from a floor plan drawn before the party program existed.

Supervision then has to be planned against the same figure. If the posted number is the maximum number of people who may legally be inside, it is also the maximum number a given staffing level may have to watch, which is why the sightline problem described in our article on supervision blind spots gets harder as capacity rises. Two venues with the same floor area and different posted numbers need different staffing plans.

There is an upside worth naming. Because the posted number is a permission rather than a measurement, it can be raised later only by going back through the process that set it: revised calculations, revised exits, revised approval. Owners who treat the first posting as provisional and keep the egress drawings current hold an option that owners who file them in a box do not.

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6. Where the Number Gets Negotiated, and by Whom

Section 1004.5 contains an exception that most owners never hear about. Where approved by the building official, the actual number of occupants for which the space is designed may be used instead of the calculated number, even though it is lower. That sentence is the legal basis for every trampoline park operating comfortably below its table-derived load.

It is also a trade with two sides. A lower approved load is easier to permit, needs fewer exits and costs less to build. It also caps revenue for the life of the fit-out, because the sign at the door is the number the fire marshal enforces and the number the insurer prices. An owner who asks for 300 because 300 is easy has bought a cheaper building and a smaller business.

The people in that conversation are the landlord, the architect of record, a fire protection engineer, the authority having jurisdiction and, often, the landlord’s insurer. The equipment supplier is not in the room and should not pretend to be. What a supplier can do is tell you, from the plan, how much floor a given attraction mix consumes, which is an input to the argument rather than the argument itself.

Sequence matters more than any single number. The classification and the factor should be agreed before the lease exhibit is signed, because the remedy for a wrong factor after signature is either money or a smaller business. Exit locations should be agreed before the demolition drawings, because that is when a wall can still move cheaply. The posted number should be agreed before the fit-out is priced, because it is the number that decides how many doors the contractor carries.

Our design-to-delivery process starts with the box rather than the equipment list for this reason. The first useful drawing of a trampoline park is not the trampoline layout; it is the exit plan with the attraction zones tested against it.

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7. What This Article Does Not Settle

Four things are deliberately left open, and an article that closed them would be less useful rather than more.

The travel-distance limits. They vary by edition, by sprinkler status and by occupancy group, and no figure is quoted here because a single number lifted out of context becomes a planning assumption nobody re-checks.

Local amendments. The International Building Code is a model code. New York City, California and most states amend it, and a city can change a factor, an exit rule or a posting requirement. Every number in this article is a starting position for a conversation with your authority having jurisdiction, not a substitute for it.

The net-area fraction. How much of a 25,000 sq ft plate survives as net area depends on columns, partitions, the café and circulation. There is no honest industry percentage, and anyone offering one has not measured your box.

The equipment standards. ASTM F2970 covers the design, manufacture, installation, operation and inspection of commercial trampoline courts. ISO 23659 does the equivalent job inside the European system. Neither one sizes an exit, sets a door width or assigns an occupant load, because both are product and operating standards rather than building codes. A certificate for the court says nothing about your egress, and an egress approval says nothing about the court. Projects fail when the two are treated as one document.

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8. The Decision Table

The table below is the whole article compressed into conditions. It is ordered the way the decisions arrive, not the way the building is built.

None of these decisions is about equipment, and all of them constrain what equipment can be sold into the space afterwards. A box that permits three doors has room for a different program from a box that permits ten, and the difference is settled long before a purchase order exists.

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Summary

A trampoline park’s capacity is a code decision before it is a design decision. The occupancy group sets the rulebook, the table row sets the occupant load, the occupant load sets the inches of exit width, and the approved number sets what can be sold on a Saturday. The equipment enters the process last, which is the opposite of how most owners sequence it.

The practical consequence is a short list. Read the box before the brochure. Ask which row is being applied and why. Put the second exit in the lease exhibit. Decide whether you want the cheaper building or the bigger business, because the code will let you choose, and then keep the drawings that prove your choice.

Three Things You Can Do Today

1. Ask the landlord for the existing egress plan, not the floor plan. A floor plan shows where the walls are. An egress plan shows which doors are rated, where they discharge and whether the second remote exit is inside your demise. If it does not exist, that absence is information.

2. Run the division before anyone runs it for you. Take the plate in square feet, divide by 50, by 15, by 7 and by 5, and write the four numbers down. You now know the range you are negotiating inside, and you can tell within one meeting whether the reviewer’s figure is the exercise-room reading or the standing-space reading.

3. Send us the box dimensions with the exit locations marked. We will tell you what attraction mix fits and where the aisles have to run, on the understanding that the egress approval itself belongs to your architect and your building official. Start with the 22,000 sq ft layout breakdown if you want to see how zone areas are usually allocated at that scale.

Get a free design and quote →

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FAQ

What occupant load factor applies to a trampoline park?

No row in Table 1004.5 names a trampoline park. Section 1004.5 directs the building official to the listed function that most nearly resembles the use, and the realistic candidates are exercise rooms at 50 sq ft gross per occupant and assembly without fixed seats at 15 sq ft net. That is a three-to-one difference before anyone argues about the concentrated and standing-space rows at 7 and 5 net.

How many exits does a trampoline park need?

At least two remote exits once the space is an assembly occupancy, and more as the occupant load rises, with the count set by a table that reads occupant load against travel distance. Door width is then a separate calculation: multiply the design occupant load by 0.2 inch per occupant, or 0.15 inch where the building is sprinklered throughout with a voice alarm system, and divide by the leaf width.

Does ASTM F2970 or ISO 23659 cover exit width?

No. ASTM F2970 covers commercial trampoline courts and their operation, maintenance and inspection, and ISO 23659 does the same for trampoline parks inside the European system. Neither assigns occupant loads, sets exit widths or governs means of egress. Those come from the building code of the jurisdiction, which is a separate approval from the equipment certificate.

Can I post a lower capacity than the calculation gives?

Often yes. Section 1004.5 allows the actual number of occupants for which the space is designed to be used where the building official approves it. The trade is real: fewer exits and less construction cost, against a hard ceiling on party stacking, buyouts and school groups for as long as the fit-out lasts.

What ceiling height does an exit path need inside a trampoline park?

Not less than 7 ft 6 in (2,286 mm) above the finished floor along the means of egress, under Section 1003.2. A trampoline hall clears that easily across the open floor and then fails it behind a party room or under a mezzanine. The clearance is measured along the path, which is why it belongs on the section drawing rather than in a note.

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Sources

1. International Code Council, “2021 International Building Code, Chapter 10: Means of Egress” (Table 1004.5; Sections 1003.2, 1004.5, 1004.8, 1004.9, 1005.3), accessed 2 November 2026. codes.iccsafe.org
2. International Code Council, “2021 International Building Code, Chapter 3: Occupancy Classification and Use” (Sections 303.1, 303.1.1, 303.4, 304.1), accessed 2 November 2026. codes.iccsafe.org
3. ASTM International, “F2970-25, Standard Practice for Design, Manufacture, Installation, Operation, Maintenance, Inspection and Major Modification of Trampoline Courts”, scope statement. astm.org
4. International Organization for Standardization, “ISO 23659:2022, Trampoline parks, safety requirements”, scope statement. committee.iso.org
5. Urban Air Adventure Park, “FAQs” (park capacity and spectator limitations), accessed 2 November 2026. urbanair.com
6. Texas Department of Licensing and Regulation, “Architectural Barriers Project Details: TABS2026013038, Altitude Trampoline Park, Pioneer Plaza, Arlington”, registered 19 February 2026. tdlr.texas.gov