SPATIAL & FUNCTIONAL CHARACTERISTICS

Maison Bayard is an independent office complex delive- ring around 8,200 m2 of usable floor area across nine above-ground levels and one basement level. The complex consists of 3 buildings which have been combined to offer a fluid, flexible spatial and functional layout. An early 19th-century building named Comédie A building in the Haussmann architectural style A new, wooden-structured building

The main entrance is at 22 rue Bayard. A monumental double door opens onto a reception concourse offering through-views of an indoor patio and waiting areas for visitors. From the concourse, a triplex lift provides access to all levels of the building s above-ground levels. The upper office floors are designed around two large patios and accessible landscaped terraces offering light and fresh air for occupants. An eighth-floor rooftop level provides a panoramic 360° view of Paris. Designed for maximum flexibility of use, the working areas are flexible to suit occupants chosen layouts. The building is fully accessible to people with reduced mobility. The patio level, which can be accessed from the concourse via a monumental staircase, is able to accommodate a contemporary restaurant-café space, a concierge, a flat modular auditorium with control room (around 90 seated guests), meeting rooms, collaborative spaces and/or traditional offices. From the building s concourse, separate lifts serve the basement level, which is used for car parking, bicycle storage and technical rooms: 26 parking spaces for light vehicles including 6 with electric charging points and 30 spaces for motorised two-wheelers. The car park can be accessed by vehicles from the street via Impasse d Antin.

QUALITY AND ARCHITECTURAL APPEAL

Maison Bayard is the first wooden building to be built in Paris s Central Business District (QCA). This construc- tion method qualifies the development for Bâtiment Bas Carbone (BBCA) low-carbon building certification. Maison Bayard offers a high standard of quality and comfort in terms of architectural provision. Maison Bayard offers spaces of generous proportions, with headroom of 3 metres in the entrance hall and patio level and between around 2.60 and 2.80 metres on other floors. The entrance hall is clad in noble materials; for example, natural «Savoie Blue» stone on the floor. The BA13 ceilings are fitted with LED lighting to enhance the space.

The triplex elevator landings and the main staircase enjoy natural light. The floor is covered with oak parquet flooring, and the ceilings are in smooth, perforated BA13. Glass railings and brass handrails lend elegance and transparency to the overall appearance.

In the office spaces, the raised floor (standard on all levels) is covered with carpet tiles, and walls are painted. Suspended ceilings are fitted in corridors, and radiant ceiling islands are installed to ensure maximum visibility for the new building s wooden surfaces. The other offices will be fitted with suspended ceilings with long radiant ceiling trays.

The metal posts of the original structure and the solid wood posts of the reconstructed building are left in open sight. In the Comédie building, the 160-year-old wooden frame is preserved and highlighted through the creation of a glass roof. The toilets are floored with porcelain stoneware tiles with matching plinths. Depending on the area, walls are either painted with a smooth satin finish, covered in fabric, or dressed with stone facing. Ceilings are in BA13 and painted. Lastly, toilets are equipped with Corian-type one-piece washbasins. The toilet units are wall hung with in-wall cisterns. TARGETED ENVIRONMENTAL PERFORMANCE AND CERTIFICATIONS

Maison Bayard adopts a policy of sustainable construc- tion. In addition to the targeted certifications, the design team has conducted studies into the building s bioclimatic design and the management of energy and fluids, as well as the use of renewable energies produced and consumed on site. Its wooden construction (façade frameworks, internal design, structure of new building) will qualify for the BBCA low-carbon label. Energy performance will comply with French RT 2012 -40% regulations, equivalent to Certivea s E+C certification level E2 and Effinergie s 2017 certification. The Maison Bayard project will achieve HQE s Excellent certification level for Certivea s Sustainable Building Passport (HQE 2016 standard), and BREEAM certification to Very Good level. From a user perspective, the building satisfies the connec- tivity requirements providing a Gold-level rating for the new WIRED SCORE certification. Lastly, the care taken in the design of the interior and exterior fittings, and the air quality, will qualify the building for the Gold level of the WELL SHELL & CORE certification Some requirements linked to this certification will be passed on to the Lessee specifications.

DENSITY, EFFICIENCY AND FLEXIBILITY

Maison Bayard is classified under the French Labour Code and can accommodate a maximum of 739 occupants, equivalent to 1 person per 10 m2 of surface area. The building complex has been designed for either single-occupant or multi-occupant use; each intermediate floor can be divided into two separate and independent sections. Floors can be used as either open or partitioned spaces. Mechanical smoke extraction from the building eliminates any partitioning constraints. 1.35-metre front grids offer ideal partitioning options. An overall net total of around 20% usable building office floor area can be used for meeting rooms.

FAÇADE AND OPENING ELEMENTS

The preserved buildings are of traditional construction from rubble stone, stones and timber frames (1913 Haussmann-style building and Comédie from 1830). They are fully restored, with the integration of thermal insulation. The window frames have been replaced with new inward-opening wooden frames. The reconstructed building, meanwhile, benefits from a wooden framework for its upper floors.

The glazed façade on rue Bayard is of the timber-framed curtain wall type (ground to fourth floor) or aluminium frame (fifth to seventh floors) with the insertion of opaque or glazed comfort windows as appropriate. It is decorated with aluminium spines (ground and first floors), metal strips on slab edges (second to fourth floors) and around the perimeter (fifth to seventh floors), perforated motorised metal shutters (second to fourth floors) and glazed windows for emergency services access. The patio, rear and Impasse d Antin façade is a glazed façade incorporating opaque comfort windows manually opening inwards with an opaque filling at slab edges. The monumental doors of the main entrance, clad in perforated aluminium sheets, are motorised and open inwards. Motorised canvas blinds are installed internally on all façades as sun protection. Glazed façades are cleaned and maintained from outside via platforms operated from the ground or baskets attached to a monorail system. Façades with terraces can be maintained from the outside without extra equipment. The street-facing façade is maintained using an aerial lift vehicle, from the ground. Accessible terraces have wooden decking floors and glazed rails.

GROUND LOADS

The permitted ground load in the office spaces is 350 kg / m2. Excess load areas at 500 kg/m2 (5% of the usable surface area of each intermediate floor) are located near the vertical structural elements.

HIGH CURRENT

The electrical architecture enables each floor of the building to be isolated (following per-lot divisions) and 2 completely distinct floors by superstructure level. Energy for each private floor is metered via two levels of sub-meter communicating with the BMS. - Power supply Power to the building is delivered via a high-voltage supply from a private station connected by double deri- vative action. - Workstation The distribution of workstations via the raised floor is provided by feeders: one feeder per workstation, based on one workstation per 10 m2 of usable surface area. Distribution will be provided for 739 workstations via 4-socket 2x10/16A+T feeders, with 5 lm of slack to cover the total office area. The implementation of a surge protection system will be considered for the implementation of 2 normal sockets and 2 surge-protected sockets. In addition, there is a power socket every 15 m in corridors for use by cleaning staff. Additional sockets and trunking for later RJ45 cabling are also provided for communal areas: hall, cafeteria, multi-purpose room, garden-level meeting rooms, external terraces, etc. Provision will be made for the necessary electrical suppliers for reception desks, counters and potential access control systems and VDI areas.

Technical description

3 8