Page 144 - AIT1025_E-Paper

BÜRO UND VERWALTUNG • OFFICE BUILDINGS TECHNISCHER AUSBAU • TECHNICAL SOLUTIONS

Blick in das Besprechungszimmer im Erschließungskern • View into the meeting room in access core

Im Bürogeschoss befinden sich Einzelbüros. • Individual offices are situated on the office floor. Der Erschließungskern tritt grün lasiert in Erscheinung. • The access core appears glazed green.

T he new office building is nestled between the company’s factory halls and a next to the round, black reception desk. The space is structured by the building core,
stream. On the extra-high entrance floor, visitors are welcomed by a spacious
which is clad with green-glazed silver-fir panels. Like the atrium staircase, the panelled
foyer and the sculptural, curved atrium staircase. The central staircase was designed core extends through all floors and, with its dark-green glaze, forms a striking contrast
as a freeform structure made of curved solid-wood panels (CLT). Like a hollowed-out to the blond wood of the office interior. The offices, most of which are open-plan, are
tree trunk, it runs through all floors and gives the building its name: Stammhaus (head located along the ribbon windows on the exterior façades.
office, but Stamm also meaning “trunk” in German). The skylight, made of an ETFE
(Ethylen-Tetrafluorethylen) foil air cushion with a diameter of 8.50 metres, lets in day- Comfort in the workplace
light, and a hidden louvre window in the roof area ensures air circulation. The Institute
for Computational Design and Construction (ICD) at the University of Stuttgart used The office building is cooled in an environmentally friendly way: wraparound balconies
computer-aided design and planning methods for curved, slender wooden compon- with vertical pilaster strips provide natural sun protection; on the southwest side, they are
ents to detail the atrium. Blumer Lehmann produced the geometrically sophisticated further supplemented by wood stack elements. The building‘s location by the stream and
shaped panels from wood from its own sawmill. The geometry of the components the automatic window ventilation at night provide cooling in the summer. Warm air can
and their connections, with many thousands of pre-drilled holes at different angles, escape through the atrium, and cool air can flow in through the automated window sas-
were extremely challenging, while the fasteners, such as screw crosses and hardwood hes. In addition, cold air from the ground is channeled into the floor slabs via foundation
dowels, are standard components. The precise manufacture of the panels facilitated piles. Clay cooling ceilings are installed in the interior meeting rooms, which cannot be
assembly. The atrium tapers upwards over the five storeys. On the second and third controlled by the automated window ventilation. Clay walls in the offices further improve
floors, there is space for attractive seating niches by the stairs. The building is organi- the indoor climate and serve as thermal storage. The colored clay plaster contrasts with
zed as a conventional timber skeleton construction over several floors and reinforced the wood surfaces, providing subtle yet targeted color accents. In the meeting rooms,
with a concrete core. The project team found a special solution for the floor slabs: individual surfaces were clad with micro-perforated wood panels. Wood acoustic ceilings
the timber-concrete-timber composite saves concrete and does not require the com- and a wool carpet ensure good acoustics in the open-plan office areas. On the second
ponents to be glued together. The post-and-beam façade with floor-to-ceiling glazing floor, a walkway connects the new building with the neighboring production hall, where
further enhances the openness of the ground floor. Informal meeting areas are located additional office space is planned for the future.

144 • AIT 10.2025