Pilestredet Park – Oslo

Courtyard, Pilestedet Park, picture by E.Støa

Courtyard, Pilestedet Park, picture by E.Støa

Pilestredet Park is the name of the area in Oslo where the Rikshospitalet University Hospital was situated from 1883 until it moved to new premises in May 2000. The former hospital site was transformed into an eco-friendly residential area in the inner city, containing mainly residential area, offices, business activity and educational institutions.
Approximately 1380 apartments are built on the site. Pilestredet Park marks a transition from small-scale pilot studies to large-scale urban implementation of principles of sustainable building in Norway.

The goal was to develop methods and solutions that contribute to higher quality urban dwellings and more environment-friendly construction, maintenance and refurbishment, including:
– Energy saving
– Water savings (150 litters per person per day),
– Reuse of materials
– Waste reduction
– Avoidance of harmful substances
– Improvement of local climate,
– High quality outdoor areas on ground and roofs, and educed run-off water
– Good indoor air quality
– Reduction of noise, dust spreading and vibrations from construction work
– Focus on pedestrian, bicycle and public transport

There was a strong focus on the reuse of demolition material in new constructions. The environmental properties of construction materials were documented to ensure that the most environmentally responsible materials available were selected.Life cycle assessments were conducted for the five most used materials, which included concrete floor slabs and cast in-situ concrete (www.secureproject.org).

Public spaces
Easy access is given to green spaces. The area is also close to city centre.

The area has good provision for public transport, cycling and walking. 80 per cent of journeys from Pilestredet Park are made by such modes of transport. Bus and tram stops have been moved closer to the Pilestredet Park to facilitate pedestrian access and public transport. Information points have been established near the main entrances of the buildings.
There are 2.5 bicycle storage spaces per apartment and innovative indoor double storey bicycle racks have been installed.
Pilestredet Park is a pedestrian friendly area with limited vehicular access, and a network of safe paths and courtyards.

The goal for heating and electricity use was 100 kWh/m2 per year, which corresponds to half of the national average and 25% below revised building regulations in Norway.
Results from anevaluation of 155 flats show that consumption of heating & electricity were 80-150 kWh/m2 per year.

Systems used are:
– High insulated windows with total U value 1.4 W/m2K
– High insulated walls with 25cm insulation, roof with 35cm
– Green roof terraces with ca. 30% cover of plants (additional saving 1kWh/m2)
– Reduced infiltration of air through walls – 0,15 h-1. (calculated savings 4kWh/m2)
– District heating
– Heat recovery ventilation system with a calculated effect of 80% (saving compared to new standards 11kWh/m2)
– Building energy management system (allowing temperature zoning of flats)
– Light control systems

All apartments have waste separation facilities.The aim is to recycle 70 percent of all domestic waste. Each building is equipped with composting reactors for wet organic waste, which pre-treat waste before it is collected in a central facility for decomposition and used as compost on the site. In 2006, 40,000 tonnes of kitchen waste was used to produce over 12,000 liters of compost. Pilestredet Park also has collection facilities for old clothing, unwanted furniture, used Christmas trees and hazardous domestic waste such as batteries.

Waste produced during construction was collected and sorted in containers on site that were reserved for the different waste fractions. In this way, approximately 75 percent of the construction waste was recycled (skanska-sustainability-case-studies.com/pdfs/15/15_Pilestredet_v001.pdf).

A stormwater runoff management system has been designed for the whole area. The inner courtyards have underground water storage and small ponds with overflow drainage channels that lead to the gardens (http://skanska-sustainability-case-studies.com/pdfs/15/15_Pilestredet_v001.pdf).

Each new inhabitant is taught how to live environmental friendly, how to use little energy and how to use the technology in each flat.
The project provides opportunities for an urban lifestyle, with both living and working in central Oslo.

Ecobox database: http://www.arkitektur.no/?nid=98469&pid0=84639&type=136087&pid2=84682

Architectural journals

– Arkitektur N 2008,nr.3,s.50-65
– Statsbygg. Ferdigmelding 2008, nr. 678, 35 s.
– Arkitektnytt 2007,nr.10,s.26
– Arkitektnytt 2007,nr.10,s.11
– Arkitektnytt 2007,nr.9,s.34
– Arkitektnytt 2007,nr.6,s.3
– Arkitektnytt 2005,nr.19,s.18
– Arkitektur i Norge. Årbok 2004,s.36-37
– Arkitektnytt 2002,nr.20,s.30-31
– Arkitektnytt 1999,nr.7,s.11

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