CONSTRUCTOR:eng. Yavor Boshnakov
GENERAL CONTRACTOR:GP Group JSC
ARCHITECT:LP Arch Ltd
GrafiX Multifunctional Building is a modern Class A office building providing a high-class work environment in line with the latest international standards. The building offers a unique combination of impressive vision, top-of-the-line technology and stylish interior.
GrafiX is located in the heart of the new administrative and commercial center of Sofia, one of the main entry-exit points of the capital – Tsarigradsko Shose Blvd. Metro stops, bus stops of the public transport are available nearby. The car access is easy and free, just a few minutes from the airport and the city center.
General functional organization by levels
GrafiX offers a precisely selected mix of 7 office floors, supplemented by a 2 storey commercial area oriented primarily to services for the corporate tenants.
The first commercial floor is surrounded by spacious English courtyards and houses the Bodega Restaurant, Inspire Hairdresser, training rooms of Oriflame, and a gym designed for exclusive use by the Progress employees.
On the ground floor there is the main lobby, 7.60m high, with provided reception and access control, Raiffeisen banking office, Eddy's Coffee Bar and Bakery, Oriflame showroom and a children center of Progress Company.
The office floors vary from 1,400 sq.m to over 1,700 sq.m, with the option to be divided into two to four offices, each of which has a separate kitchenette and sanitary facilities. There are recreational terraces. The open space configuration allows for the separation of individual offices depending on the specific requirements of the tenants.
The underground car parking has a total capacity of 250 cars, including 36 parking lots for gas-fuelled cars and 11 parking lots accessible to people with disabilities. On the underground levels there are separate storage areas available for letting.
The building is equipped with 6 high-speed lifts (1.6m/s) serving the office floors, each with a capacity of 21 people. Elevators and a lift platform have been provided for the needs of the underground car park and the two commercial floors. The lifts are connected to a destination control system that minimizes waiting time.
Technical and area indicators
- Built-up area: 1,415 sq.m
- Total underground floorage: 11,100 sq.m
- Total area of the complex, including underground levels: 24,450 sq.m
- Lettable built up area: 11,867 sq.m
- Total lettable area, including terraces: 13,135 sq.m
- Profitability of standard floor levels (lettable portion of the total floor area): 88.80%
- Parking capacity: 250 underground and 20 outdoor parking lots.
- Parking capacity: 1 parking lot per lettable area of less than 44.00sq.m
Capacity of lettable office zones:
- 9.1-11 sq.m per workplace (based on the useful area of the zone)
Maximum capacity of lettable office zones (including visitors):
- 6.4-6.8 sq.m per person (based on the useful area of the zone)
- 6.8-7.3 sq.m per person (based on the built-up area of the zone)
- Percentage of leased areas – 100%
Architecture and structural systems
The large façade segmentation, the big showcases, the large-scale stone panels and the lack of formal decoration ensure the impressive scale of the building and make it highly prominent. The dislocated bars at an angle to the façade plane bring, in an untraceable rhythm, inner tension with a sense of randomness and spontaneity, and make this seemingly completely "disciplined" façade non-boring and innovative, bringing in new images every time you look at it.
The large-sized steel structure, supporting the spatial unit above the entrance – with impressive "X" size, weaves the logo of the building in the structural tectonics and upgrades from its simple design feature to the symbol of the site.
The structure is made of a monolithic reinforced concrete skeleton. Due to the fact that the underground levels are constructed close to two of the plot boundaries and the great depth of foundation, a reinforcing structure with reinforced concrete diaphragm walls was executed.
The foundation is executed on a foundation slab. The basement of the building is insulated from groundwater through the implementation of a complex solution for a waterproofing tray based on bituminous membranes.
The façades are made as a combination of aluminium-glass suspended façades, façade window frames with broken thermobridge, triple glazing and ventilated natural stone lining (including heat insulation of non-combustible mineral wool). A perforated façade grid with a steel mesh is constructed around the outer metal staircase.
All roofs are built with steam-, heat- and water-proofing using modern building systems and materials.
The outdoor floorings (ramps, steps and alleys) around the building, as well as the granite floors of the spacers on the terraces are fitted with electric heating for snow-melting.
The partition walls are made of ceramic bricks, vertical gypsum plasterboard partition and shaft walls. In addition, removable (light) office partitions are provided in the lettable areas, forming working areas and auxiliary spaces and mountable between the double floor and the ceiling.
Raised (double) flooring system is provided in the dry premises of the common parts and lettable areas. The finishing floor in the office area is carpet and that in the common parts is made of natural stone.
The net height of the lettable areas is 3.00 m.
Technical specifications and technologies used
- Heating, ventilation and air conditioning
GrafiX is equipped with a highly efficient LG Generation V heating/cooling system with three-pipe air-conditioning system with variable refrigerant flow VRV/VRF allowing for simultaneous heating and cooling. There are four separate areas in the office floors and the location of air conditioners and ceiling grilles allow for the separation of smaller spaces to provide greater flexibility and maximum comfort for the users.
On the office floors there are local floor fresh-air conditioning units with active recuperation, supporting the ventilation systems for fresh air and providing a minimum of 40m³/h per person. Natural ventilation is achieved through openable parts on the façade.
Independent suction installations for all rooms with unpleasant odour such as sanitary units, kitchenettes, warehouses, ausgusses, etc. have been built. Six-fold suction ventilation for the underground levels has been built.
- Fire alarm and extinguishing systems:
An automatic addressable fire alarm system has been set up with control unit located in a room with continuous monitoring.
The underground garages in the building are equipped with an automatic sprinkler fire-extinguishing system whereby each of the three levels is independently powered. Fire alarm panels are built on the floors. A voice alert system is built for the whole building providing notification in case of fire, threat of attacks, natural disasters, etc.
- Electrical systems:
The building has a first-category power supply with a central UPS. The power supply is provided from two substations, and the total power for the entire building is 3MW. Backup power is provided by two diesel generators. One of the generators supplies the backup sections of the office switchboards, lifts and a backup restaurant section. The other diesel generator provides power to the other loads.
Each workstation is fitted with 2 contact openings, reserved in the diesel section in the electrical switchboard with a total power of 400W and 2 contact openings from the operational section in the electrical switchboard. Lightning protection of the entire building was constructed and re-grounding of the main electrical switchboards was completed.
- Water supply and sewerage:
The internal water supply is designed as a separate system: for domestic water supply, for automatic fire extinguishing (sprinkler) system and for fire-extinguishing panels.
Two tanks – for fire and domestic needs – were built on P3 level. The drinking-water tank is sufficient to provide fresh water to the building for 24 hours.
The water sewerage of the building is divided – for rainwater, domestic water and water from the restaurant. A central grease trap is fitted for the restaurant sewerage system.
- Building management system (BMS):
The BMS system controls the lighting in the common parts of the building; the air exchange and the energy consumption of the office premises; boiler control; window valves; ad signs. The current consumption of the users, sprinkler system and other technological equipment, garage doors and lifts is monitored.
Connection with the fire brigade is ensured in case of a fire. The underground parking is fitted with gas detectors for propane-butane and methane. When gas is detected at one of the levels, the gas signalling system alerts the BMS that isolates the zone and prevents its spreading to the rest of the building, takes it out via the suction air-duct at the level and turns on the alarm on the floor.
Evacuation, working, on-duty, façade and external lighting systems are controlled by the BMS system. The large façade glazing reduces the need for artificial lighting. All lighting systems in the lettable areas are managed under DALI, which contributes to the energy and economic efficiency of the lighting system. One of the main advantages is the individual addressing regardless of the physical location. Each operational unit is assigned a DALI address that can be individually managed, included in groups and can receive broadcast commands (to all). The DALI system offers a variety of comfort options through appropriate lighting: from practical options for switching on and off, to smoothly changing light, colour and colour temperature; from controlling a particular lighting unit to changing lighting compositions; from direct control by switches, remote and mobile devices to automatic maintenance of optimal parameters.
The implemented external façade lighting has a basic aesthetic function, focusing mainly on the architecture, the materials and the structure and the light effect sought by the architect and the owner of the building. The main types of façade luminaries are LED RGB floodlights of varying power. Due to the focused façade lighting, individual architectural elements can be selected and there is no need to illuminate the entire façade, so the focus can be placed on a part or an element of the building. Different colours, scenarios and effects can be selected for the façade lighting.
In the space around the building there are green areas with decorative vegetation. Deciduous tall trees, grafted species with spherical tree crowns, coniferous species, shrubs – evergreen and flowering, perennial flowers have been planted. Dendrological species have been selected with a variety of foliage with different type and colour and long-lasting blooming time.
The landscaped garden in the yard includes numerous recreation and relaxation spots equipped with park furniture – benches, decorative built-in lighting, background music and WiFi connection.
Improvement and reconstruction of the existing green area for public use located adjacent to the building has been completed. The existing pavement has been replaced and a new alley with recreation areas has been built with new dendrological species planted – high deciduous trees, conifers and shrubs.