Located in the foothills to the North of Osaka, on the edge of the cities outer suburbs, Digital Realty will construct its first data centre in Japan. The site is situated on a localised high plateau in a new commercial precinct. This elevated position of the site provides the building with good views of the surroundings and also affords the surrounding
areas with good views of this prominent site.
From a geological perspective the site was problematic being closely located to the intersection of two fault lines which form part of the Uemachi fault. The site is divided into two distinct levels with a 4m battered slope separating the two.
The Northern part of the site is the higher portion with more stable, well compacted ground conditions compared to the lower Southern part of the site. Having two very distinct sets of ground conditions on the site suggested that the building be split into
two discrete elements. A building containing the larger technical data halls with their associated power and cooling plant should be located on the more stable upper plateau whilst the smaller administrative building with its associated entrance and
ancillary spaces, be located on the lower.
This clear split between technical and administrative spaces overcame a great many problems associated with services distribution within the building. The different geological conditions associated with the two different levels on the site meant that the buildings could move very differently under earthquake conditions. As a consequence, any services bridging between the two buildings would need to accommodate movement of around 300mm for each building in all directions. Therefore if the buildings were moving in opposing directions that separation could be up to 600mm.