A large exhibition tent has to do two jobs at once: disappear into the background of the event and hold a crowd comfortably for days at a time. Clear span designs solve both by removing internal columns, which frees the floor for display stands, aisles and staging. The BT40 series is a good example of what this engineering looks like on an outdoor site.

The BT40 offers a clear span of 40 meters, with lengths available from 40 meters upward in 5-meter increments. That footprint suits trade fairs, product launches and multi-zone exhibitions where a single uninterrupted hall is worth more than several smaller tents joined together.

Frame and Fabric Specification

The frame is built from hard-pressed extruded aluminum 6061-T6 sections, the same alloy family used in structural applications where weight and strength both matter. Bolted connections keep the geometry square through repeated assembly, and the extruded sections resist the twisting loads that can loosen lighter profiles.

The cover is double PVC-coated polyester textile, chosen for its waterproofing and its flame-retardant performance to DIN 4102 B1 and M2 standards. UV resistance is built into the coating, which slows fabric aging during long summer installs. For an organizer comparing a clear span exhibition marquee against framed alternatives, this specification is the difference between a structure that holds up and one that sags by day three.

Wind Rating and Site Safety

The maximum allowed wind speed is 100 km/h, which covers most outdoor exhibition scenarios when the tent is properly anchored. Ground anchors, ballast and guy lines are sized to the site, and the sidewalls are engineered to release pressure rather than trap it. Operators should always confirm the anchoring plan with the supplier because a loose base converts a good frame into a liability.

Optional accessories extend the usefulness of the tent: wooden flooring, glass doors and walls, PVC hard walls, sidewalls with clear PVC windows, rain gutters, decorative ceilings and interior curtains. A modular event marquee systems approach lets organizers mix these options to match the show.

Size Range and Typical Applications

Standard widths run from 12 meters up to 60 meters, which covers everything from a single product demo hall to a full expo pavilion. The BT40 sits at 40 meters, a width often chosen for events that need a center aisle with booths on both sides and a stage at one end.

Typical applications include parties, outdoor exhibitions, weddings, trade fairs, celebrations, sports events, military solutions, temporary warehouses and workshops. The same clear span structure can be dressed for a corporate launch in the morning and a dinner gala at night, which is why trade show marquees keep returning to this format.

Marquee Tent FAQ

How much interior space does a 40m clear span exhibition tent provide?
A 40-meter clear span with no internal columns gives organizers a fully open floor, so booth rows, aisles and staging can be laid out without working around support poles. The usable width is close to the nominal span, which is the main advantage over framed structures.

What frame and fabric specifications should an exhibition tent meet?
Look for an extruded aluminum frame such as 6061-T6, double PVC-coated polyester fabric with UV resistance, and a flame-retardant rating such as DIN 4102 B1 or M2. These specifications determine wind performance, fire safety and how the tent survives a multi-day install. The same standards apply to a temporary exhibition hall marquee.

How quickly can a clear span marquee be assembled for a trade fair?
Assembly time depends on span, anchoring and fit-out, but a trained crew can usually raise the shell of a medium-span tent within days. Flooring, lighting and interior dressing are typically scheduled after the frame and fabric are in place.

What accessories are worth adding to a large exhibition tent?
Glass walls, clear window sidewalls, rain gutters, wooden flooring and interior curtains give the most value. They improve light, keep guests dry at entrances and make the space look finished, which matters when the exhibition brand is part of the event.

→ Browse Exhibition Marquee Tents