121C at Pennsylvania Convention Center an ASM Managed Facility

121C is 18.6 x 11.9 m (61 x 39 ft), 221 m² (2,382 sq ft), with a 5.5 m (18 ft) ceiling.

Plan view

LED wall that fits

Under a 5.5 m ceiling with 1.5 m trim and 0.3 m clearance you get 7 rows of 500 mm tile flown. Along the 18.6 m wall a Absen A2 Pro wall runs 29 x 7 (4872 x 1176 px, 2,030 kg, 37.6 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, 121C holds about 305 theater seats, 124 banquet seats at rounds of 10, or 85 classroom seats. Back row in theater is roughly 11.6 m from the downstage edge; the previz checks whether the bottom of the wall clears the heads in front.

Other rooms at Pennsylvania Convention Center an ASM Managed Facility

• Hall A109.7 x 112.8 m (360 x 370 ft) · 9.1 m ceiling
• Hall F112.2 x 103.6 m (368 x 340 ft) · 4.6 m ceiling
• Hall E67.4 x 157.9 m (221 x 518 ft) · 8.8 m ceiling
• Hall D89.6 x 115.8 m (294 x 380 ft) · 8.8 m ceiling
• Hall B73.2 x 112.8 m (240 x 370 ft) · 9.1 m ceiling
• Hall C73.2 x 112.8 m (240 x 370 ft) · 9.1 m ceiling
• 1234544.8 x 106.4 m (147 x 349 ft) · 11 m ceiling
• Grand Hall46.3 x 70.1 m (152 x 230 ft) · 27.4 m ceiling
• Hall G57.9 x 54.6 m (190 x 179 ft) · 4.3 m ceiling
• Ballroom AB61.6 x 47.5 m (202 x 156 ft) · 3.1 m ceiling
• Ballroom above level 247.5 x 61.6 m (156 x 202 ft) · 12.8 m ceiling
• 144.8 x 35.1 m (147 x 115 ft) · 11 m ceiling

Published dimensions (source), fetched 2026-09-04. All rooms at Pennsylvania Convention Center an ASM Managed Facility · Venues in Philadelphia