One arrives as a structure. The other arrives as parts.
The distinction is not size and it is not quality. It is whether the roof came with the stage or has to be stood up beside it.
A mobile stage is a trailer that deploys hydraulically into a roofed, ground-supported structure. The deck, the roof, the side towers and the ballast are one engineered unit with one certificate, and the thing that tows onto the site is the thing that plays the show.
A modular stage is a set of decks and legs assembled on site into whatever plan the drawing calls for. It is a floor. If the show needs cover, or anything hung above the performers, that is a separate ground-support structure with its own engineering, its own ballast and its own wind plan, standing around the deck rather than resting on it.
Which is why the comparison is awkward to make honestly: a mobile stage publishes a rigging capacity and a wind rating because it has a roof, and a modular deck publishes a uniformly distributed load in weight per unit area because it has a floor. The two numbers do not convert into one another. Reading each one for what it is turns out to be most of the job.
The capacity scales with the stage, and it is published to the pound.
Stageline publishes a rigging figure on each product page. These are its figures, read from those pages on October 8, 2026.
- SL100 — 11,400 lb
Floor of 24′ × 20′ up to 40′ × 32′ (7.3 m × 6.1 m up to 12.2 m × 9.8 m), a rigging capacity of 11,400 lb (5,170 kg), and side trusses rated at 1,500 lb (680 kg) per side. Dry weight is listed at 9,460 lb (4,290 kg) and the page says it tows behind a standard pickup truck, which is the line that decides whether the stage needs a driver with a class licence or a production manager with a hitch.
- SL260 — 18,500 lb
Floor of 32′ × 24′ or 32′ × 32′ up to 56′ × 32′ (9.8 m × 7.3 m or 9.8 m × 9.8 m up to 17.1 m × 9.8 m), rigging capacity 18,500 lb (8,391 kg), and a rooftop screen support listed at 4,500 lb (2,040 kg).
- SL320 — 26,000 lb
Floor of 40′ × 40′ (12.2 m × 12.2 m), rigging capacity 26,000 lb (11,793 kg), with lateral screen support published as up to 6,000 lb (2,721 kg) per side. Over the three models the rigging figure rises by a factor of about 2.3 and the per-side screen figure by a factor of four.
- What the modular equivalent would be
There is no equivalent, and that is the useful part. A deck system is rated for what stands on it, not for what hangs above it, because nothing hangs from it. Every pound of line array, lighting and screen on a modular build is carried by a structure that was specified, engineered and ballasted as its own job — so the capacity is whatever that structure was designed for, and it is a separate document with a separate engineer’s stamp.
The rating is the same on all three. The walls are what change it.
This is the finding worth carrying out of the comparison, and it runs against the way the question is usually asked.
Stageline publishes the same wind resistance line on the SL100, the SL260 and the SL320: 115 mph without windwalls, 77 mph with windwalls (185 km/h and 123 km/h). The rigging capacity across those three models more than doubles. The rated wind speed does not move at all.
So the intuition that a bigger stage is a safer stage in weather does not survive contact with the manufacturer’s own numbers. What moves the figure is the surface area presented to the air. Fitting full-height weather walls on three sides takes the rating down by 38 mph — roughly a third — because the structure has stopped being a frame the wind passes through and started being something it pushes on.
The practical shape of that is a decision nobody wants to make at 4 p.m. on a show day: the walls that keep rain off the upstage corner and give the video a clean background are the same walls that lower the number the stage is allowed to stand in. A banner, a scrim, a sponsor backdrop and a set wall are all windwalls as far as the air is concerned, whatever the production calls them.
Stageline’s own guidance on the subject names its high-wind thresholds as in excess of 60 mph (97 km/h) for a stage carrying backdrops and 80 to 90 mph (128 to 145 km/h) without them, and tells buyers to ask the stage provider for a signed engineering document specifying wind resistance. That last sentence is the one to act on: the rating belongs to a specific configuration of a specific unit, and the paper is what says which.
Fixed geometry against whatever shape the site allows.
What each kind of stage publishes about its own floor, and why the answer is a plan question rather than a capacity question.
- A mobile stage deploys to a published size, and only that size
The SL100 opens to between 24′ × 20′ and 40′ × 32′; the SL320 is 40′ × 40′. Those are the shapes available. A site that cannot take a trailer of that footprint, or a show that needs a thrust, a catwalk, a runway or a stage that wraps a corner, has already answered the question.
- A modular stage publishes a vocabulary instead
StageRight lists its All Purpose deck in 4′ × 8′, 4′ × 6′, 4′ × 4′, 3′ × 8′ and 3′ × 6′, at 3.2″ thick and reversible, so one surface can be used for rehearsal and the other turned up for the show. Prolyte lists StageDex decks in metric and imperial sizes and several shapes, triangles included. The floor plan is drawn first and the decks are chosen to make it.
- And it publishes a load figure the mobile stage does not
Prolyte publishes its StageDex Topline and Basicline 2 m × 1 m decks at a maximum load of 750 kg/m² uniformly distributed, with a self weight of 35.6 kg per deck and a water-resistant, anti-skid birch plywood top. Converted, 750 kg/m² is about 153 lb/ft² and 35.6 kg is about 78 lb — arithmetic, not specification, and worth redoing against the figures on the page.
- Surface is specified, which matters more outdoors than in
StageRight publishes three finishes for the same deck: a commercial-grade polyolefin carpet, PolyTrac, described as a black slip-resistant ABS, and TechStage, a fibreglass sheeting with a black textured surface at 0.095″ thick. On an outdoor build in a climate with an afternoon storm in the forecast most days of the summer, the difference between a carpet deck and a slip-resistant one is a safety decision rather than a finish decision.
Two structures, two different documents governing them.
The entertainment industry writes its own consensus standards through ESTA, and which one applies is decided by what the thing is rather than by how big it is.
A roofed outdoor stage, whether it unfolded from a trailer or was built from truss on the grass, falls under ANSI E1.21 — Entertainment Technology: Temporary Structures Used for Technical Production of Outdoor Entertainment Events. The 2024 revision is the current one. ESTA records that it is referenced by the 2024 International Fire Code and correlated with the 2024 International Building Code’s requirements for temporary structures, which is the mechanism by which a consensus standard turns into something a fire marshal can ask about.
A bare deck is a different document. ANSI E1.62 — 2021, reaffirmed 2026, sets minimum payload and sideways force requirements for mass-produced portable platforms, ramps, stairs and choral risers. Its scope has a boundary worth reading twice: custom platforms and complete stage systems are outside it. The standard that covers a rented deck stops applying at the point where the decks become a stage system.
Around both sit ANSI ES1.19 — 2020, Safety Requirements for Special Event Structures, which covers temporary structures for special events indoors and out; ANSI ES1.7 — 2021 on weather preparedness for live events and their temporary structures; and ANSI E1.2 — 2021 on the design, manufacture and use of aluminium trusses and towers, which is the one a ground-support roof is built against.
None of this is a technicality on a public site. A municipal permit, a fire marshal’s inspection and an insurer’s certificate all want to know which structure was erected, who engineered it, and what it is rated to stand in — and the answer is shorter when the structure arrived as one unit with one certificate than when it was assembled from three suppliers’ parts on the morning of the show.
The site asks the questions in a fixed order.
Pulling the published figures into the sequence a real outdoor build actually puts them in.
First, can a trailer get to the spot and stay there. A beach, a plaza with bollards, a park with a soft approach, a rooftop or a closed street with a turning circle a semi cannot make will rule out a mobile stage before anything else is discussed. The SL100’s published 9,460 lb dry weight and pickup tow make it the one most likely to survive that question; the larger units in the range are a different vehicle problem.
Second, what has to hang. If the design puts a line array, a lighting rig and a screen above the performers, the mobile stage answers with a single published figure — 11,400, 18,500 or 26,000 lb — and the modular build answers with a ground-support structure that has to be specified and engineered to carry it. One of those is a line on a product page and the other is a drawing and a stamp.
Third, what shape the show is. A thrust, a runway, a stage in the round, a deck that steps down to a dance floor or a platform that has to clear a kerb and a tree root is modular work, because the floor is being drawn rather than chosen.
Fourth, the weather plan, and this is where the 115-against-77 figure earns its place. Decide the walls, the banners and the backdrop at design, not on the day, because they set the number the structure is allowed to stand in and that number is what the hold, the strike and the evacuation trigger are written against. In a South Florida summer, where the storm arrives in the afternoon and the wind with it, the configuration chosen weeks earlier is what the operations plan has to live with.
Fifth, and only fifth, the hours. Stageline labels a set-up time on each product page: 0H30 for the SL100, 1H00 for the SL260 and 2H30 for the SL320. A modular stage of comparable area is a crew call measured in parts of a day, and the roof over it is another one. On a street closure with a permit window, or a park with a published curfew on build noise, that gap is often the whole argument — which is why it belongs at the end of the list rather than the start. It is the tiebreaker once the structure is already possible, and never the reason a structure that will not fit the site gets chosen anyway.
The honest version of this comparison has no winner in it. A mobile stage is a fast, certified, fixed-shape answer to a site that can receive it; a modular stage is a drawn answer to a site that cannot, or to a show whose floor is part of the design. What is not a matter of judgment is the paperwork: a rated wind speed, a rigging capacity, a deck load and the standard the structure was built against are all published figures, and all four are readable before a site visit is booked.
Where the figures come from
- 11,400 lb; 1,500 lb per side; 9,460 lb dry weight; 24′ × 20′ up to 40′ × 32′ — Stageline’s published SL100 product page, stageline.com, October 8, 2026, which also carries the pickup-tow wording quoted in §06.
- 18,500 lb; 4,500 lb rooftop screen support; 32′ × 24′ or 32′ × 32′ up to 56′ × 32′ — Stageline’s published SL260 product page, same date. This is also the page on which the set-up row is labelled, which is how the 0H30 / 1H00 / 2H30 figures in §06 are read: the same row on the SL100, SL260 and SL320 pages, reported as the manufacturer prints it rather than converted.
- 26,000 lb; 6,000 lb per side; 40′ × 40′ — Stageline’s published SL320 product page, same date.
- 115 mph without windwalls | 77 mph with windwalls — the identical wind resistance line published on all three of those product pages, quoted as printed. The 60 mph and 80-to-90 mph high-wind thresholds and the advice to obtain a signed engineering document are from Stageline’s own stages overview page, same date. The 38 mph difference is subtraction.
- 750 kg/m² UDL; 35.6 kg self weight; birch plywood — Prolyte’s published StageDex Topline 2×1 m and Basicline 2×1 m product pages, prolyte.com, October 8, 2026. The 153 lb/ft² and 78 lb conversions are arithmetic and are labelled as such in the text.
- 4′ × 8′ through 3′ × 6′; 3.2″ thick; polyolefin carpet, PolyTrac, TechStage at 0.095″ — StageRight’s published All Purpose Stage Deck page, stageright.com, October 8, 2026, including the quoted description of PolyTrac as a black, slip-resistant ABS.
- ANSI E1.21 — 2024, E1.62 — 2021 (R2026), ES1.19 — 2020, ES1.7 — 2021, E1.2 — 2021 — titles, revision years and scope wording from ESTA’s own published standards list, tsp.esta.org, October 8, 2026 — including the record that E1.21 — 2024 is referenced by the 2024 International Fire Code and correlated with the 2024 International Building Code, and that E1.62 excludes custom platforms and complete stage systems from its scope.
- Nothing here states what this company owns — manufacturers are named because the specifications are theirs and are published. No stage, deck or structure on this page is claimed as inventory, and no figure on it is a price.