CROATIAN LOTTERY BUILDING
SPATIAL RELATIONSHIP BETWEEN THE NEW AND THE EXISTING BUILDINGS
DISPOSITION OF THE NEW BUILDING FORMS TWO PUBLIC SQUARES WHILE AT THE SAME TIME RETAINS THE VIEWS OF MEDVEDNICA MOUNTAIN FOR A NEIGHBORING HOUSING BUILDING
DESIGNING THE MAIN BUILDING VOLUME AS TWO SHIFTED ELEMENTS WITH CENTRAL STRUCTURAL AND SERVICE SPACE CREATES THE OPTIMAL NATURAL LIGHTING CONDITIONS, FLEXIBILITY OF USE AND UNOBSTRUCTED VIEWS FOR A WORKSPACE INSIDE
EXTERIOR GREEN ROOF AND TOP ROOF TERRACES ARE ACCESSIBLE TO ALL EMPLOYEES
PUBLICLY ACCESIBLE GROUND FLOOR WITH THE PEDESTRIAN URBAN LINKS
Located within settlements planned according to CIAM principles and south of the New Zagreb dominant axis – the “Dubrovnik Avenue” – the new building of the Croatian Lottery follows the series of existing office buildings along the avenue. The two towers are located on opposite edges of the plot, with their longer sides facing the city, and are connected by the lower connecting volume, which opens views of the neighboring southern residential building. The shift of the floor plan additionally moves the western tower away from the existing residential building to create a public park facing the neighborhood and to allow maximum sun exposure of the new building. The eastern tower is recessed from the avenue towards the neighborhood, forming a public square in the direction of the main intersection and the pedestrian underpass.
With this volumetric setup and the introduction of additional pedestrian connections in the north-south direction, the building establishes the surrounding space with new urban elements - funnel-shaped squares at the entrances towards the towers, an open access square towards the avenue, a public park towards the southern settlement, and a small atrium square. With the open layout of the ground floor and the continuity of the exterior materials in the interior, the idea of publicly available space is further emphasized. Inside the building, the central position of the communications and service spaces allows room for a naturally well-lit zone for offices, while the concept of the construction and installation system ensures maximum flexibility in their organization.
The facade’s rhythmic alternation of closed and open surfaces, in the full height of the floors, frames the segments of the surrounding space. With the scale of its openings, the facade communicates the building’s specific position at the junction of an important city avenue and the entrance to a calmer residential area. The varied density of enclosed and open zones, which depends on the orientation, view and program of the building, creates an optimal balance of its internal intimacy, quality views, stature, as well as the energy and economic efficiency of the building.
CLIENT: Hrvatska lutrija d.o.o., competition, 2nd PRIZE
SIZE: 23.895 m2
COMPANY: ONDA ARHITEKTURA
COMPETITION DESIGN TEAM: Nika Dželalija, Bernardica Grubišić, Marcela Ostroški, Krešimir Renić
COMPETITION COLLABORATORS: architectural renderings - Studio Arbol j.d.o.o., model - Domagoj Kolonić, structural design - Tvrtko Renić