Amphitheater seating: auditoriums, training, plenary halls

02

The framework

Training spaces and amphitheaters are a use category growing within head offices, prompting real estate departments to standardize their reference framework over 5 to 10 years.

03

Your trade-offs

CFO, Asset Manager: where the tipping point lies

The fixed amphitheater seat is an asset capitalized over 10 years. For it to weigh correctly on the balance sheet, it must be amortized over recurring use.

For the CFO, the profitability calculation depends directly on the annual usage rate: mobile folding furniture, less costly to purchase and amortized over a shorter period, becomes more relevant when the room is not used intensively. Conversely, a fixed load-bearing beam is justified for spaces with high occupancy recurrence, where its amortization cost per hour of use becomes competitive. For the Asset Manager, a fixed amphitheater enhances a prestige real estate asset, whereas mobile furniture preserves the flexibility of the floor plate in the event of a change of use. The trade-off is not technical, it is asset-based.

An often-overlooked benefit: the load-bearing beam significantly reduces installation time compared with seat-by-seat fixing, representing several days of site work saved on a 200-seat project, and as much rent avoided during the works phase.

04

Our comparison

Load-bearing beam or pre-equipped training: what decides it

Programs pre-equipped with a writing tablet increase trainer-learner interactivity: office managers regularly observe better occupancy of training rooms after re-equipping. This trend is confirmed by the collaborative uses observed in office environments.

05

When not to go for it

Cases where the load-bearing beam is not the right answer

Commercial honesty requires us to name the programs for which our standard offering is not best placed.

Below 40 seats or for a light tiered meeting room, the industrialization of the load-bearing beam loses its value. The amortization cost per hour of use becomes prohibitive and the rigidity of the layout penalizes changes to the floor plate. We steer toward mobile furniture on casters, deployable in 4 to 6 weeks and fully reconfigurable, for 200 to 300 € excl. VAT per seat.

Above 400 seats, or in the presence of a staged scenography, the trade-off falls within specialized acoustic and stage project management: reverberation treatment in a large volume, speech intelligibility at 25 m, sound and lighting control. These projects fall outside Kytom’s standard scope and we recommend a co-contracting arrangement with a dedicated acoustician and scenographer.

For prestige plenary halls used fewer than 30 times per year, the multimedia pre-equipment integrated into the load-bearing beam (an additional 150 to 200 € excl. VAT/seat) does not pay off. We then propose a mobile control unit on a trolley and floor sockets around the perimeter, which cover most real-world uses for a fraction of the budget.

06

Method

1. Volume audit and ERP calculation
   During weeks 1 and 2, our surveyor visits the site to measure the existing volume, calculate the regulatory setbacks for ERP type L (rows of 8 seats maximum between exits, 0.90m circulation), and simulate three capacity scenarios. The deliverable is a dimensioned 2D plan with an indicative layout and a budget estimate accurate to within 10%.
2. Program selection and asset-based trade-off
   Weeks 3 and 4, we work with the CFO and the Asset Manager on the trade-off between the fixed load-bearing beam and mobile folding furniture, based on the 60-seat / 80-hour annual tipping point. The output is a signed specification specifying the chosen family, the target capacity and the budget envelope excl. VAT per seat.
3. Ergonomic configuration in the showroom
   Weeks 4 and 5, physical validation of prototypes on 2 to 3 references in the manufacturer’s showroom, by appointment, with a prolonged seating test of at least 1h30. The seat, backrest, armrests, writing tablet and upholstery (velvet, technical fabric, wood) are decided. Validation report signed by the client.
4. Technical integration and compliance
   Weeks 5 to 10, integration of high- and low-voltage wiring if multimedia pre-equipment is included (HDMI, USB-C, power under the seat), and documentary validation of compliance with the standard applicable to fixed spectator seating and with the M1 fire rating. Partner manufacturers provide the rating reports and the material traceability required by the safety commission.
5. Installation, acceptance and commission
   Weeks 11 and 12, installation on a continuous load-bearing beam (25% saving on installation time versus unit fixing), laser alignment, clearing of reservations and acceptance report. Our project manager steers the ERP safety commission and submits the operating file. Manufacturer’s 5-year warranty on the load-bearing structures.