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 Arena Zagreb / UPI-2M

Architects: UPI-2M

Location: Zagreb, Croatia

Architects: Nenad Borgudan, Tamara Stantic Brcic, Berislav Medic, Alan Leo Plestina

Project Team: ALAN LEO PLESTINA, Lic.Arch., TAMARA STANTI!CBR"I!, Lic.Arch.,

NENAD BORGUDAN, Arch., SANJA TUSEK, Arch., ANAMARIA PLESTINA, Arch.,

KRE#O CERAJ, Lic.Ceng., MARKO $URAN, Constr.Techn., NEVENA KUZMANIC,

Arch., DINKO UGLESIC, Arch., IVAN CIKES, Lic.Arch., VEDRAN JUKIC,

Lic.Arhc.,IVICA ZMI#A, Arch.Student, MARKO NIKIC, Arch.Student., REA GIASCHI,

Civil Eng. Student

Structural Design: BERISLAV MEDIC, Lic.Ceng., GORAN JANJUS, Lic.Ceng., HRVOJE

MIHAL, Lic.Ceng., ANDREJ MARKOVIC, Lic.Ceng., DARKO MAKAR, Constr.Techn.,

TOMISLAV ILI"KOVIC,Ceng., RUZICA PALIJAN, Lic.Ceng., HRVOJE SARIC,

Constr.Techn

Area: 90340.0 sqm

Project Year: 2009

Photographs: Miljenko Hegedic, Robert Les, Vanja Solin, Davor Konjikusic, UPI-2M,

Tomislav Ilickovic

Arena Zagreb is the multifunctional indoor arena with 15.000 seating capacity built to host

the 2009 World Men's Handball Championship. It is located in the south-western part of

Zagreb, Croatia. Thanks to its iconic design and position at one of the main city entrances, it

has immediately become a landmark of the city.

© Miljenko Hegedic

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The unique shape of this building is strongly inspired by its significance in the city context,

and has been achieved by synergy between its architecture and structure.Shaped as an

oval ribbed white bowl, 86 large pre-stressed, pre-fabricated concrete curved columns form

the main façade. They are mutually connected by an illuminate semi-translucent double-skin

polycarbonate envelope which enables various light effects. Suspended roof structure is

hanging from those columns leaving minimum roof structure below roof level.Having in mind

that the venue of such capacity cannot be profitable if capable to host only sports

competitions, Arena Zagreb was designed as a multifunctional hall with all spatial and

functional characteristics which enable maximal flexibility and provide numerous events to

take place.

Multi-functionality is achieved by many elements such as the flexibility of the grandstand

with its lower rows of retractable seats and curtain partitions, possibility of dividing the whole

building in smaller mutually independent spatial zones and by covering the needs of all

types of users and events.Also, other design interventions made a great contribution to

building’s qualities, such as preserving sufficient spaces reserved for performers and event

managers, providing simple and fluid visitors’ circulation from entering point to the seats on

the stand, organising various catering facilities, adequate acoustic interventions within the

bowl as well as providing sufficient roof bearing capacity capable to carry additional scene

equipment.No natural light is enabled in the main bowl except in case when the light-proof

roof sky domes are in open position – which is of high importance for matches to be played

and for special events without light reflection disturbance and quality TV broadcasting.

© Davor Konjikusic

© Vanja Solin

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BASIC INFORMATION

Arena Zagreb is located in south-western part of Zagreb, in Lani!te district. When

experienced in city macro-scale Arena Zagreb is positioned at one of the city main

entrances, as an extension of Savska Street - one of the main city traffic line axes as well as

an extension of Jarun Lake - one of the main city recreation zones.Experienced in city

micro-scale it is positioned in the semi urban district with huge development plans,

representing the central point of the new planned shopping / entertainment center

surrounded with new planned residential zones.By recent reconstruction of neighbouring

access streets, the whole area got appropriate and well dimensioned traffic connection to

the remaining parts of the city, which includes also the city bus connection (tram connection

planned in the near future). Integrated in the mentioned reconstruction all other

infrastructure public facilities with adequate capacity have been secured as well (water,

sewage, gas, electricity…).

This new multi-functional venue consists of 6 floor levels (1 underground and 5 above

ground), covering total GBA of 90.340 m2 on a 29.540 m2 footprint. The total cost of 1

square meter was estimated to be 850" including all side-costs.In the one-level

underground garage and on terrain level there are 926 parking places in total, plus 38 bus / 

obi-van parking places. The height of the underground water prohibited the execution of

additional underground garage levels, and on the other hand reduced size of the plot didn’t

allow planning parking on the terrain around the venue. However, it is planned to use the

3.300 parking places in the nearby shopping center when finished, which is the most

common way worldwide to secure sufficient parking capacity.

© Vanja Solin

© Davor Konjikusic

 

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URBAN CONTEXT

The chosen site is positioned in a previously undeveloped city district, with few low budget

social residential buildings and uncultivated fields - the narrow surrounding and the plot

itself were more a dump yard then a field.Even after the Arena design was officially

presented to the public, during construction and especially after it ended, the surrounding

area has really started to develop rapidly and the Arena has became the highlight point of

the new planned shopping / entertainment complex surrounded with new planned

residential zones

This effect was additionally supported by the major road and public infrastructure

reconstruction around the plot in order to enable quality vehicle and pedestrian access to

Arena.In order to maximally integrate Arena in the future urban tissue, a richly dimensioned

main pedestrian approach platform with four main entrances to the venue was planed. Due

to its public pedestrian ramps and towards platform oriented catering facilities it is becoming

a public pedestrian cross-road connecting the developing shopping complex and its

landscaped public square with the developing and existing residential part of that city area.

© Davor Konjikusic

© Vanja Solin

 

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SPATIAL AND FUNCTIONAL ORGANIZATION

Functional area partition follows the circulation routes of different users. Underground level

is mainly garage space approachable by 2 car ramps. On the ground floor, there is a field of

play with all necessary athletes-, performers-, judges-, trainer’s facilities as well as the

rentable office area. The central arena’s court can easily be transformed, depending on the

particular event needs. The 1st floor represents the main pedestrian approach level with

four main entrances to the venue. The visitors enter the grandstand directly from this level

or by rising to the 3rd floor and passing through the circular halls with numerous catering

facilities - partly connected to the pedestrian platform and usable also independently from

the venue. The 2nd floor is reserved for VIP-guests and media stuff - they have their own

fully equipped spaces with possibility of multi-functional usage also for conferences,

workshops or congresses. The restaurant on this level offers direct view to the court and

can be used during events, and also independently. The 4th floor is reserved for technical

equipment, but is also connected to catwalks distributed underneath the roof and used for

maintenance of lighting and loudspeaker devices assembled along them. All described

zones are mutually independent and equipped with sufficient number of separated accesses

with very clear user’s circulation system - quick and easy entering and exiting is perfectly

secured, and mixing user’s circulation routes is avoided. In order to make the circulation

even more comfortable, the colour coding system was implemented.

MULTI-FUNCTIONALITY

Arena Zagreb is designed for hosting numerous sporting, cultural, entertainment and

business events such as: handball, indoor football, basketball, volleyball, indoor athletics,

hockey, other sporting competitions and also concerts, exhibitions, fairs, congresses and

family shows. In order to adequately accommodate such events, many supporting facilities

are being provided - catering, sanitary, cloak rooms, offices and similar spaces; also the

small training hall with its own facilities and smaller multi-functional spaces on the 2nd floorcan be used for mini congresses, workshops and / or lectures.

© Vanja Solin

© Davor Konjikusic

 

07

OCT

2010Projects  Built Projects

Selected Projects  Stadiums

Zagreb Sports Architecture

Croatia

Architect: UPI-2M

Photographers: Robert Les

Davor Konjikusic Vanja Solin

Tomislav Ilickovic UPI-2M

Miljenko Hegedic

Material:  Concrete

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Grandstand

The flexibility of this venue is the most visible by the grandstand transformability. According

to the main seating configuration for handball competitions (also basketball, volleyball,

tennis and indoor football) the grandstand is covering 15.024 seats of which 151

incorporated for disabled spectators. The lowest part of the grandstand is a zone of 15-row

retractable stands (26-row at the potential stage position) with 4.556 seats (plus additional

132 free seats at the court level). The remaining part of the grandstand is fixed and

incorporates 10.336 seats divided on lower and upper stand. This includes 314 VIP seats in

front of VIP boxes. For other sports events (table tennis, badminton, gymnastic, boxing,

wrestling...) there is a possibility of putting additional seats at the court level, and for indoor

athletics, all telescopic stands must be retracted, which reduces the capacity. Cultural and

entertainment events (concerts, exhibitions, fairs…) demand the grandstand to be

transformed in line with the requirements of the event organizer, so the ground space can

be used for additional seating or standing places. If the nature of the event requires reduced

seating capacity, the upper part of the stand can be enclosed using the suspended textile

partitions.

Acoustics

Respecting all foreseen events that are going to be held in Arena Zagreb, the acoustic

calculations and models gave the optimal solution for application of various acoustic

materials, which resulted with the well balanced space acoustic in this venue. Combined

with this a dispersed loudspeakers system has been chosen for less demanding

performances, otherwise the additional equipment is to be installed depending of the

wanted acoustic requirements. Thanks to the hall acoustic expertise, the bowl is adequate

for holding even a London Philharmonic Orchestra concert.

© Davor Konjikusic

© Vanja Solin

 

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INSTALLATIONS

The installation network follows the functional zoning, which also enables their independent

usage and usage of just a small part of the whole building with installation functioning

separately and independently from the remaining building. Several electrical connecting

points are positioned all over the court, and floor channels for optical cables are spread over

the whole venue.In the court no natural light is enabled to avoid light reflection disturbance

for quality TV broadcasting. The light-proof roof sky domes, used for smoke exhaustion, can

be also manually opened and used for natural lighting during certain events and

maintenance period, and for natural ventilation.

The heating and hot water preparation is secured by gas boilers, and cooling system by

chillers placed on the 4th floor around the grandstands. The complete HVAC system is

programmable and flexible to fulfil several exploitation scenarios. The volume of the court

bowl that has to be air conditioned is considerably reduced with the chosen structural

solution of the suspended roof. An additional element providing savings in energy

consumption in exploitation phase is the bank of ice, which provides continuous and

effective pre-cooling system. The garage is organized as an open underground space withsufficient openings that secure natural ventilation.

© Davor Konjikusic

© UPI-2M

 

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STRUCTURE AND MATERIALS

The roof bearing structure consists of 23 suspended steel girders with approximately 100m

span, mutually connected with two stabilization spatial girders and a network of catwalks.

From this structure the load is transferred to the pre-stressed concrete curvedly formed

columns – lamellas – positioned around the venue’s perimeter. They have been produced

on the site with support of the site installed concrete production plant and with usage of

filtered gravel material from excavation of the pit, by which unnecessary transportation was

avoided.

The main façade consists of ventilated semi-translucent polycarbonate envelope that

enables reduction in heat losses, secures daylight in circular halls around the grandstands,

and provides space for illuminate installation of the main façade. This envelope is positioned

between concrete curved lamellas, whose white coloured surface by its reflection

characteristics prevents overheating as well.All other used materials were chosen by taking

into consideration their quality, wearability endurance – all in terms of maintenance costs,

but also environmental friendliness.

Diagram

© Vanja Solin

 

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© Miljenko Hegedic © Robert Les © Vanja Solin

© Vanja Solin © Vanja Solin © Miljenko Hegedic

© Davor Konjikusic © Davor Konjikusic © Davor Konjikusic

© Davor Konjikusic © Davor Konjikusic © Davor Konjikusic

© Davor Konjikusic © Davor Konjikusic © Davor Konjikusic

© Davor Konjikusic © Vanja Solin © Vanja Solin

Section

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© Vanja Solin © Vanja Solin © Vanja Solin

© Vanja Solin © UPI-2M © Vanja Solin

© Vanja Solin © Vanja Solin © Vanja Solin

© Vanja Solin © Vanja Solin © UPI-2M

© Davor Konjikusic © Tomislav Ilickovic © Vanja Solin

Plan Plan Plan

Plan Plan Diagram

Plan Section Plan

Plan

View location on google maps

Location to be used only as a reference. It could indicate city/country but not exact address.

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Cite:

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