Grand Ballroom Pre-Function at Marriott Chicago O’Hare/Rosemont
Grand Ballroom Pre-Function is 21.9 x 39.3 m (72 x 129 ft), 861 m² (9,264 sq ft), with a 3.7 m (12 ft) ceiling.
Open in 3D previzPlan view
LED wall that fits
Under a 3.7 m ceiling with 1.5 m trim and 0.3 m clearance you get 3 rows of 500 mm tile flown, which is tight; ground-stack or go lower on trim. Along the 39.3 m wall a Absen PL2.5 Plus V2 wall runs 62 x 3 (12400 x 600 px, 1,451 kg, 29.8 kW).
| Panel | Pitch | Wall (cols x rows) | Size | Resolution | Weight | Power (max) |
|---|---|---|---|---|---|---|
| Absen KLCOB 0.78 | 0.78 mm | 52 x 5 = 260 | 31.2 x 1.7 m | 39936 x 2160 | 1,170 kg / 2,579 lb | 23 kW, 111 A @ 208 V |
| Absen PL2.5 Plus V2 | 2.5 mm | 62 x 3 = 186 | 31 x 1.5 m | 12400 x 600 | 1,451 kg / 3,198 lb | 29.8 kW, 143 A @ 208 V |
| Absen PL3.9 Plus V2 | 3.9 mm | 62 x 3 = 186 | 31 x 1.5 m | 7936 x 384 | 1,451 kg / 3,198 lb | 26 kW, 125 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 Pre-Function holds about 1,726 theater seats, 706 banquet seats at rounds of 10, or 485 classroom seats. Back row in theater is roughly 32.3 m from the downstage edge; the previz checks whether the bottom of the wall clears the heads in front.
Other rooms at Marriott Chicago O’Hare/Rosemont
- Chicago Ballroom51.5 x 17.4 m (169 x 57 ft) · 3 m ceiling
- Grand Ballroom21.9 x 39.3 m (72 x 129 ft) · 5.5 m ceiling
- Grand Ballroom 1-429.3 x 21.9 m (96 x 72 ft) · 5.5 m ceiling
- O'Hare Ballroom23.5 x 25.3 m (77 x 83 ft) · 4.3 m ceiling
- O'Hare Pre-function Space23.5 x 25.3 m (77 x 83 ft) · 4.3 m ceiling
- Grand Ballroom 421.9 x 19.2 m (72 x 63 ft) · 5.5 m ceiling
- O'Hare Terminal 513.4 x 25.3 m (44 x 83 ft) · 4.3 m ceiling
- Chicago F+G17.4 x 17.1 m (57 x 56 ft) · 3 m ceiling
- Chicago A-C17.4 x 16.2 m (57 x 53 ft) · 3 m ceiling
- O'Hare Ballroom Terminal 1-325.3 x 10.1 m (83 x 33 ft) · 4.3 m ceiling
- Salons 8, 9 & 1010.4 x 21.9 m (34 x 72 ft) · 3.7 m ceiling
- Grand Ballroom 1-321.9 x 10.1 m (72 x 33 ft) · 3.7 m ceiling
Published dimensions (source), fetched 2026-09-04. All rooms at Marriott Chicago O’Hare/Rosemont · Venues in Chicago