Office Building Ost-West-Hof, Hamburg

Client: Geschäftshaus Ost-West-Hof GbR Construction Costs: 12,6 million DM Services: planning, design, tendering, construction supervision, project management Period: 1990 - 1992 Cooperation: Architekturbüro Markovic, Ronai, Lütjen

A 6-storey building with a gross floor area of about 5.000 m² and a single floor underground garage was erected on the property Teilfeld 5 which encloses a surface area of 1,090 m². The construction is marked by two contrary sectors: a massive reinforced concrete component with a brick-dazzled hole front and a circular building with an almost 100% glass front. The main, carrying building substances are made from reinforced concrete. Steel- and glass- constructions accentuate the extraordinary character of the building.

The glass front is numerously infiltrated by the reinforced concrete constructions which determine the remarkable appearance. The thematic separation was obtained mainly by insulation baskets. The building’s inner development includes a generous hall which reaches over all the floors. It is coined by the steel filigree stairs and the elevator pit made from steel tube- and glass-constructions.

The building is based flat on single and strip foundation. The building ground consists of glacial loam and boulder clay. Settlement problems between the new, the existing and the transition building were solved by the building succession and constructive measures at the connection.

The building was constructed in a blocked building pit. The area available for the construction site was greatly restricted as three fronts of the plant access directly to public streets.

Sellhorn overtook the master planning in co-operation with the Architekturbüro Markovic, Ronai, Lütjen. This collaboration included the following main components:

• Architecture and engineering technical planning
• Achievement and structural design
• Achievement in technical supplies (heater, air condition, ventilation, sanitary engineering, electronic engineering)
• Thermal building physics
• Coordination of achievement for noise control, architectural acoustics, soil mechanics, earthwork, foundation engineering
  as well as measurements
• Project management.