Fairplex is the 487-acre home of the LA County Fair at 1101 West McKinley Avenue in Pomona, and it hosts trade shows, car shows, concerts and conventions in its Expo Halls year-round. Expo Hall 4 alone is 105,500 sq ft with a permanent stage, and Halls 5 through 10 add column-free halls from 30,800 to 42,120 sq ft. Above the Line provides audio, lighting, video, LED and staging for shows across the campus.
Each hall has its own height, power and loading. Expo Hall 4's power drops from the ceiling and must be installed by the Fairplex electrician, Expo Hall 9 has in-floor three-phase boxes, and the arched roof in Expo Hall 10 gives the most height of the smaller halls. We build every show around the published specs for its hall and confirm power, rigging and labor rules with Fairplex before load-in.
Hall sizes, heights, power and capacities come from Fairplex's own venue rental page (fairplex.com). Conference center figures come from the Sheraton Fairplex capacity chart on marriott.com. Photos are Fairplex's own, from its official photo albums linked on fairplex.com and its conference center page. Production notes describe a typical Above the Line setup.
Fairplex's largest hall has a permanent stage with dressing rooms, air conditioning and five electric roll-up doors (17 × 14 ft). The ceiling rises from 19 ft at the walls to 56 ft 6 in at the high point, with lights at 30 ft.
Theater 10,526 · Classroom 6,896 · Banquet 8,333
In a 770-foot room, one PA at the stage can't reach the back. We fly delay arrays down the hall and run IMAG screens so the back half sees and hears the stage.
The wood-floored stage has a 19 ft 6 in main curtain, 8 dressing rooms and restrooms on stage level. There is no wheelchair access to the stage. Power comes from 9 overhead raceways with a 600 A plug-in busway, plus a 400 A circuit for portable dimming and a 100 A circuit for audio.
Fairplex requires its electrician to drop power from the ceiling, so we send our power plot early and include the drops in the schedule and the budget.
The roll-up doors let trucks and show vehicles drive straight onto the floor.
We plan truck order and door assignments with the show's other vendors so audio, lighting and video load in without waiting.
A long, column-free hall with three ramped loading doors (17 × 15 ft), two upstairs offices and in-floor power boxes with 120/208 V three-phase 100 A service.
Theater 4,210 · Classroom 2,758 · Banquet 3,333 · Listed capacity 3,000
With lights at 19 ft, rigging height is limited, so we use ground-supported truss and towers for lighting and screens.
An arched-roof hall with lights at 21 ft and two loading doors (17 × 15 ft), with ramp access at the north door.
Theater 3,157 · Classroom 2,068 · Banquet 2,500 · Listed capacity 2,000
The arched roof is the tallest of the smaller halls, so it suits concerts and stage shows with a ground-supported lighting rig.
Four matching column-free halls, each with three loading doors (17 × 15 ft), ticket booths and two upstairs offices. Expo Hall 8 adjoins the conference center. Fairplex links photo albums for these halls; they aren't shown here.
Listed capacity 2,000 each1
Good for trade shows and consumer events. We power booths from the in-floor boxes and keep stage power on its own circuit.
The conference center is the converted 33,620 sq ft exhibit building next to the Sheraton Fairplex hotel, with the 12,402 sq ft California Ballroom (78 × 159 × 23 ft), the Sonoma Ballroom and breakout rooms. It is run by the hotel. See our Sheraton Fairplex Hotel & Conference Center page for the full room list.
California Ballroom: Theater 1,200 · Classroom 750 · Banquet 830 · Reception 1,250
Shows that use both the halls and the ballroom need one crew plan across two operators, Fairplex and the hotel, so we schedule load-in and power with each.
Capacities as published by Fairplex for each Expo Hall, and by the Sheraton Fairplex hotel for its conference center.
| Hall | Sq ft | Dimensions | Height | Theater | Classroom (18") | Banquet (60") | Listed capacity | Source |
|---|---|---|---|---|---|---|---|---|
| Fairplex Expo Halls | ||||||||
| Expo Hall 4 | 105,500 | 130'7" (pillar to pillar) to 146'7" wide; 770' stage to north wall | 19' at walls to 56'6" peak; lights 30' | 10,526 | 6,896 | 8,333 | — | fairplex.com |
| Expo Hall 5 | 33,600 | 100' × 318' | Lights 21'; tie rods 18' | —1 | —1 | —1 | 2,000 | fairplex.com |
| Expo Halls 6, 7 & 8 (each) | 33,600 | 100' × 318' | Lights 21'; tie rods 18' | 3,157 | 2,068 | 2,500 | 2,000 | fairplex.com |
| Expo Hall 9 | 42,120 | 130' × 323' | Lights 19'; tie rods 20'7" | 4,210 | 2,758 | 3,333 | 3,000 | fairplex.com |
| Expo Hall 10 | 30,800 | 131' × 214' | 39' center, 35' at arch; lights 21' | 3,1572 | 2,0682 | 2,5002 | 2,000 | fairplex.com |
| Sheraton Fairplex Conference Center (hotel-operated) | ||||||||
| California Ballroom | 12,4023 | 78' × 159' | 23' | 1,200 | 750 | 830 | 1,250 reception | Marriott capacity chart |
| California 1-2 or 2-3 | 8,268 | 78' × 106' | 23' | 1,083 | 450 | 560 | 880 reception | Marriott capacity chart |
| California 1, 2 or 3 | 4,134 | 78' × 53' | 23' | 415 | 250 | 275 | 475 reception | Marriott capacity chart |
| Sonoma Ballroom | 4,074 | 42' × 97' | 15' | 400 | 270 | 270 | 450 reception | Marriott capacity chart |
Sources: Fairplex Venues page (Expo Halls 4 to 10); Fairplex conference center page; Sheraton Fairplex capacity chart (marriott.com); Fairplex photo albums for Hall 4, Hall 9 and Hall 10. Retrieved October 19, 2026. “—” = not published.
1 The Expo Hall 5 listing on fairplex.com repeats Expo Hall 4's set-up figures (10,526 theater, 8,333 banquet) for a hall a third the size, so they are not shown. Its listed capacity is 2,000. Confirm with Fairplex.
2 Expo Hall 10's set-up figures on fairplex.com are the same as those for Halls 6 to 8, though it is 30,800 sq ft against their 33,600. Confirm with Fairplex.
3 fairplex.com describes the conference center as having “a 12,000-square-foot ballroom” and a 4,000 sq ft junior ballroom for meetings of up to 1,000. The hotel's chart gives the California Ballroom as 12,402 sq ft and the Sonoma Ballroom as 4,074 sq ft.
Not an official Fairplex or Sheraton website. Confirm every capacity with Fairplex or the hotel before contracting.
Official Fairplex plans for Expo Halls 4 to 9, as published on fairplex.com. Fairplex doesn't publish a plan for Expo Hall 10.
We supply PA, delay arrays, mics and backline sized to each hall, from a car-show stage to a concert in Expo Hall 4.
Projection and screens for keynotes and award shows in the halls and the California Ballroom.
Stage and show lighting on ground-supported truss or the permanent Hall 4 stage.
LED walls for main stages, sponsor displays and IMAG in large halls.
Cameras and switching for IMAG and recording of stage programs.
We draw show layouts from Fairplex's official hall plans and our own measurements.
Our crew streams stage programs and award shows for remote audiences.
We provide early, itemized budgets for shows at Fairplex, with Fairplex electrical drops listed separately.
Our technicians work alongside Fairplex staff and other show vendors from load-in to strike.
Gear ships from our own Southern California warehouses.
We maintain our inventory from VUE, Shure, Barco, Avid, Yamaha and Sony.
Based in Southern California, we work in the Inland Empire and San Gabriel Valley regularly.
We build sponsor loops, stage graphics and schedules sized to your screens.
Our itemized budgets match what is actually on the show floor.
We keep you updated clearly and consistently from proposal to strike.
Our line-by-line proposals are drawn from Fairplex's published hall specs and plans.
In 16 years and 2,113 events, including 85 concerts, our team has handled everything from early design to show day.
Learn More →We support expos, car shows, concerts and conferences across the Fairplex halls and the conference center.
Learn More →Above the Line, your AV partner at Fairplex. Succeed Today →
Send your RFP, floor plan or stage plot for Fairplex, and we'll return an itemized quote.
