Investor info

DESIGN OF THE BUILDING

the planned building consists of two volumes, higher on the west and lower on the east. The lower, triangular part, is five storey high and situated at the intersection of Savska Street and Zagrebačka Avenue, while the second volume is 41 storey high, rectangular shaped, and positioned along the newly planned road parallel to the planned Šarengradska Street.

CONNECTION TO THE ROAD NETWORK

The newly planned lot is connected to the public road by a newly planned service road on the west by the railway, and the pedestrian access is from Zagrebačka Avenue and the newly planned service road. Garages on levels -1 to -6 are accessed from the newly planned service road by ramps whose gradient is 16%.

CAR PARKING

It is necessary to provide 320 underground car parking spaces within the building, as part of the planned development. On each floor level except basement level -6, 4 car parking spaces are planned as "Klaus" system G 61 (horizontal) on two levels, enabling parking of two vehicles on the surface required for one car. Floor to ceiling height is sufficient for using this system, which does not require lowering of the floor under the car parking space. Size of car parking space is 2.3 x 5 m. Car parking spaces for the disabled are planned in accordance with the regulations on providing accessibility for the disabled and people with disabilities. Their size is 3.7 x 5 m. The number of parking spaces is 22, which is 7% of total parking spaces.

WASTE MANAGEMENT

Waste management area is planned by the northeastern edge of the lot, where containers for various types of waste will be placed.

PUBLIC UTILITIES

Existing buildings are connected to the municipal water supply and sewage system, municipal gas, telephone, and municipal low-voltage distribution system.

ELECTRICAL INSTALLATION

The following installations and equipment are planned in the new building:

main low voltage distribution installation
distribution to appliances and fixtures
distribution to fixtures
installation of EMP heating, air conditioning and ventilation system
lighting installation
safety lighting installation
outdoor lighting installation
potential equalizing device and grounding
fire alarm system installation
CO concentration detection system
central control panel installation
telephone
sound system
antenna installation
SOS system installation for disabled
diesel powered generator

CONNECTION FOR POWER SUPPLY

Low voltage electricity supply comes form the local transformer station 10(20)/0,4kV, 3x2000kVA + 1x1000kVA, planned in the level -1 below ground.

DIESEL POWERED GENERATOR

In case of a power failure, a back-up power generator is planned. A compact diesel-powered generator will be placed in an outdoor cabinet, with reduced noise emmision, on the terrain near the lower building.

ELECTRIC LIGHTING

GENERAL LIGHTING

All lighting fixtures are supplied with electricity from the electric installation, and in case of blackout, part of the lighting fixtures are supplied by back-up power generator. Level of illumination is planned according to the requirements of specific spaces, planned by the architect. Choice of lighting fixtures will be guided by criteria of consumption control and easy maintenance. Lighting management in the public spaces is organized by central control system.

OUTDOOR LIGHTING

Outside space will be illuminated with metal halogen lamps mounted on lighting poles. Outdoor illumination will be controlled by central control system.

SAFETY LIGHTING

In case of electric power failure or an emergency situation, safety lighting is planned along the evacuation route.

FIRE ALARM SYSTEM

Fire safety control is placed in a fire resistant cabinet in the entrance lobby, with 24h surveillance. Fire alarm system controls the sprinkler system and dry hydrant system. In case of activation of the sprinkler system or if the fire alarm system detects a fire, the fire alarm system will send signals via control modules to de-block and close the fire doors, de-block and open sliding fire doors, turn off the ventilation system and close the fire switches. In the same manner, the fire alarm system signals opening of smoke exhaust ductwork, opening of the screens of pressurization ductwork to supply fresh air to fire stairs of the high rise building, turns on the ventilation system of the space by the staircase to the high-rise and garage, and activates the pressurized ventilation system of the fire stairs of the lower building. In case of activation of the sprnikler system or if the fire alarm system detects a fire, the fire alarm system will send signals via control modules to put evacuation elevator into fire-safety mode of operation, and automatically send all the elevators to the ground floor level (evacuation station) or the back up evacuation station. The safety lighting system in evacuation routes is switched on. Sound alerting system and visual notification for emergency evacuation management is planned.

CALCULATION OF POWER LOAD

HIGH RISE - OFFICE SPACE - Maximum load P_v = 1.860kW
CATERING AND COMMERCIAL SPACE - Maximum load P_v =370kW
GARAGE AND COMMON SPACES - Maximum load P_v =530kW
TOTAL (estimated load) - Maximum load P_v =2.760kW

New power station is planned with 2x2000 kVA transformers and respective space for future expansion (new 1000 - 2000 kVA power station).

WATER SUPPLY AND SEWAGE

WATER SUPPLY

The water supply is from the municipal water supply network. The installation is dimensioned according to the sanitary and hydrant water consumption. Water for fire extinction will be obtained from out door fire hydrants connected ti the water supply network, and building of two new hydrants is planned.

a) Sanitary water supply
Sanitary water supply distribution is included to all users within the building. It is under pressure of municipal water supply up to the height of 30 m. levels above 30 m will be supplied by two separate networks, one from +50 to +100 m, the other from +100 to +150 m. Required pressure will be provided by hydraulic stations with interrupting chambers. The hydraulic stations operate automatically.

b) Hydrant supply
Fire hydrant network is planned for the new building, i.e. option of fire extinction with indoor wall-mounted hydrants. The fire hydrant network is a separate installation. In order to ensure reliable and safe supply, several closed circuits are planned. Size of the fire hydrant network is in accordance with pressure simulated in the fire protection project. The planned pressure is 7,5 lit/sec. Two independent hydrant networks are planned, a pressurized hydrant network that will supply water for hydrants in the first 5 floors, and dry hydrant network in the basement level. Besides the hydrant network, wall-mounted fire extinguishers on visible and accessible places are planned inside the building. Outdoor fire safety is provided with fire hydrants Ø100 mm, connected to the municipal water supply. The water for the fire hydrant comes from the municipal water supply.

SEWAGE

Sewage system disposes of rainwater and waste water. The sewage of the new building is connected to the municipal sewage system. Waste water will be separated before the connection to the municipal sewage system, so rainwater is collected separately from sanitary waste water. As the new building is high-rise, management of sanitary waste water is operated with SOLVENT GEBERIT drainage system, which ensures continuous speed in vertical pipes, without requiring a parallel airing duct. Conventional gravity sewer is installed in the lower building. The underground storey sewage will be pumped up to the level of the conventional gravity sewer. Waste from the garages are purified in the grease separator before joining the rainwater or sanitary waste water. waste water form the kitchens will also be purified.

SPRINKLER INSTALLATION

In accordance with fire safety measures, sprinkler installation is planned after directives VdS CEA 4001 (German insurance societies' directives for installation of sprinkler systems). The entire building will be protected with the sprinkler system, except for the following spaces:

sanitary facilities
vertical installation ducts
canopy
electrical rooms
elevators
staircases
cavities within the suspended ceiling (less than 80 cm high), if they do not contain inflammable material
cavities within the suspended ceiling (less than 30 cm high)

TYPE OF SPRINKLER SYSTEM

The above-ground part of the building is heated during the winter, and will be protected by wet pipe system, while garage will be protected by dry pipe system.

HEATING, COOLING AND VENTILATION

ELECTRIC HEATING STATION

For the heating of the entire building, a heating station consisting of two KOMPAKT 1400 units (heat capacity 1400 kW) is planned. The heating station is equipped with heating regulator (indirect system), heat consumption measurement, and accompanying equipment. heating medium in the secondary cycle is water 80/60 ºC. Heating station is placed in the level -1, next to the ramp, facilitating uninterrupted access. Inside the stations is the system for hot water expansion (diktir system) and chemical preparation of water (ion-exchange resin device) and flow with circulation pumps.

HEATING STATION ON 20th FLOOR

Due to height of the building and large static pressure in the installation, a hydraulic interruption by means of a heat exchanger is planned on the 20th floor. Exchange station with pumps for the secondary circuit and the accompanying fixtures is placed inside the engine room. The secondary circuit will have separated expansion system and chemical preparation of water. In the secondary circuit, the heating water temperature is lower (3 - 5 ºC).

COOLING INSTALLATION

Two water cooling units (7/14 ºC system) are planned on the roof of the lower building, as part of the rooftop plant (ventilation engine room with air handling units for both the high rise and the low building). Cooling units have air cooled refrigerant circuits and regular operation control (10 - 100% capacity). Cooling units cool the air in air handling units and the office spaces of both the higher and lower building (up to 16th floor). TIP 2 offices (level 17-39) and the lounge snack bar are cooled by separate system.

VENTILATION OF THE GARAGE

Since the garage is entirely below ground, adequate forced ventilation must be provided. Sprinkler fixtures will be installed in the garage. Therefore, ventilation is not intended to remove smoke, but to prevent build-up of carbon monoxide above he permitted level.

FIRE SAFETY

Mechanical installations do not present a risk of fire, except for the electrical fixtures that can cause fire. The main mechanical equipment is placed outside the building, and the installations inside the building (metal ducts, piping) are fire-resistant. The building has all the necessary fire prevention fittings (hydrants, sprinkler system, fire extinguishers), described in separate documents. The fire safety of mechanical equipment is ensured by fore extinguishers placed by the units. No gas installation is planned in the buildings, which greatly diminishes the danger of fire or explosions.