Ballroom B at Gateway Convention Center

Ballroom B is 15.2 x 30.5 m (50 x 100 ft), 464 m² (4,990 sq ft), with a 4.3 m (14 ft) ceiling.

Plan view

LED wall that fits

Under a 4.3 m ceiling with 1.5 m trim and 0.3 m clearance you get 4 rows of 500 mm tile flown. Along the 30.5 m wall a Absen A2 Pro wall runs 48 x 4 (8064 x 672 px, 1,920 kg, 35.5 kW).

Wall sizing assumes 1.5 m trim to the bottom edge, 0.3 m clearance under the ceiling, and a wall no wider than 80% of the longest wall. Weight and power are tile totals from the panel spec sheet; add processing, rigging, and cable.

Seating estimate

After a 12 x 7 m stage, Ballroom B holds about 843 theater seats, 345 banquet seats at rounds of 10, or 237 classroom seats. Back row in theater is roughly 23.5 m from the downstage edge; the previz checks whether the bottom of the wall clears the heads in front.

Other rooms at Gateway Convention Center

• Center Hall (CH)62.2 x 30.5 m (204 x 100 ft) · 7.9 m ceiling
• Great Rivers Ballroom (GRB)60 x 30.5 m (197 x 100 ft) · 4.3 m ceiling
• Center Hall B31.7 x 30.5 m (104 x 100 ft) · 7.9 m ceiling
• Center Hall A29.9 x 30.5 m (98 x 100 ft) · 7.9 m ceiling
• Ballroom C15.2 x 30.5 m (50 x 100 ft) · 6.1 m ceiling
• LaSalle22.3 x 19.8 m (73 x 65 ft) · 4 m ceiling
• Ballroom A13.7 x 30.5 m (45 x 100 ft) · 4.3 m ceiling
• Ballroom D11.6 x 30.5 m (38 x 100 ft) · 6.1 m ceiling
• Marquette15.2 x 10.4 m (50 x 34 ft) · 3.7 m ceiling
• Mississippian15.2 x 10.4 m (50 x 34 ft) · 3.7 m ceiling
• Salon 115.2 x 10.1 m (50 x 33 ft) · 6.1 m ceiling
• Salon 215.2 x 10.1 m (50 x 33 ft) · 6.1 m ceiling

Published dimensions (source), fetched 2026-09-05. All rooms at Gateway Convention Center · Venues in Collinsville