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Grand Ballroom B at Iowa Events Center

Published dimensions

Grand Ballroom B is 36.6 x 36.6 m (120 x 120 ft), 1,340 m² (14,419 sq ft), with a 12.2 m (40 ft) ceiling.

Plan view

Shape approximate: the venue publishes area only, so this room is drawn as a square of equal area.

LED wall that fits

Under a 12.2 m ceiling with 1.5 m trim and 0.3 m clearance you get 20 rows of 500 mm tile flown. Along the 36.6 m wall a Absen PL2.5 Plus V2 wall runs 58 x 20 (11600 x 4000 px, 9,048 kg, 185.6 kW).

Panel	Pitch	Wall (cols x rows)	Size	Resolution	Weight	Power (max)
Absen KLCOB 0.78	0.78 mm	48 x 30 = 1440	28.8 x 10.1 m	36864 x 12960	6,480 kg / 14,286 lb	127.4 kW, 613 A @ 208 V
Absen PL2.5 Plus V2	2.5 mm	58 x 20 = 1160	29 x 10 m	11600 x 4000	9,048 kg / 19,947 lb	185.6 kW, 892 A @ 208 V
Absen PL3.9 Plus V2	3.9 mm	58 x 20 = 1160	29 x 10 m	7424 x 2560	9,048 kg / 19,947 lb	162.4 kW, 781 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, Grand Ballroom B holds about 2,790 theater seats, 1,141 banquet seats at rounds of 10, or 784 classroom seats. Back row in theater is roughly 29.6 m from the downstage edge; the previz checks whether the bottom of the wall clears the heads in front.

Other rooms at Iowa Events Center

Hall A/B/C116.8 x 116.8 m (383 x 383 ft) · 3.1 m ceiling
Hall B/C81.4 x 109.7 m (267 x 360 ft) · 10.7 m ceiling
Hall A81.1 x 58.2 m (266 x 191 ft) · 4 m ceiling
Hall C81.4 x 56.4 m (267 x 185 ft) · 10.7 m ceiling
Hall B81.4 x 53.3 m (267 x 175 ft) · 10.7 m ceiling
Arena Floor88.4 x 38.7 m (290 x 127 ft) · 26.2 m ceiling
Grand Ballroom54.9 x 24.4 m (180 x 80 ft) · 12.2 m ceiling
Grand Ballroom A36.6 x 36.6 m (120 x 120 ft) · 12.2 m ceiling
Junior Ballroom A/B/C53.6 x 18.3 m (176 x 60 ft) · 4.3 m ceiling
Junior Ballroom B27.4 x 18.3 m (90 x 60 ft) · 4.3 m ceiling
Junior Ballroom A13.4 x 18.3 m (44 x 60 ft) · 4.3 m ceiling
Junior Ballroom C12.8 x 18.3 m (42 x 60 ft) · 4.3 m ceiling

Published dimensions (source), fetched 2026-09-05. All rooms at Iowa Events Center · Venues in Des Moines