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Great Rivers Ballroom (GRB) at Gateway Convention Center

Published dimensions

Great Rivers Ballroom (GRB) is 60 x 30.5 m (197 x 100 ft), 1,830 m² (19,698 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 60 m wall a Absen PL2.5 Plus V2 wall runs 96 x 4 (19200 x 800 px, 2,995 kg, 61.4 kW).

Panel	Pitch	Wall (cols x rows)	Size	Resolution	Weight	Power (max)
Absen KLCOB 0.78	0.78 mm	80 x 7 = 560	48 x 2.4 m	61440 x 3024	2,520 kg / 5,556 lb	49.6 kW, 238 A @ 208 V
Absen PL2.5 Plus V2	2.5 mm	96 x 4 = 384	48 x 2 m	19200 x 800	2,995 kg / 6,603 lb	61.4 kW, 295 A @ 208 V
Absen PL3.9 Plus V2	3.9 mm	96 x 4 = 384	48 x 2 m	12288 x 512	2,995 kg / 6,603 lb	53.8 kW, 258 A @ 208 V

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, Great Rivers Ballroom (GRB) holds about 3,880 theater seats, 1,587 banquet seats at rounds of 10, or 1,091 classroom seats. Back row in theater is roughly 53 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
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 B15.2 x 30.5 m (50 x 100 ft) · 4.3 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