June 2013
CONSTRUCTION WORLD
40
THE NEWHEADQUARTERS
of the Banco de
la Ciudad de Buenos Aires bears the signature
of the London architect, Norman Foster. The
four floors of the prestigious office complex
in the Parque Patricios district are covered by
a 9 000m² undulating roof structure. Slender
circular columns in generous griddimensions
of 16 m x 24 m seem to allow the filigree
appearance of the architectural concrete
construction to float in the air at a height of
over 20 m. The building is 94 m wide, more
than 100m long and opens up to the outside
through the use of large glazed areas.
Architectural concrete
accurately and quickly formed
A dimensionally-accurate design, flawless
architectural concrete quality and high
working operations speed – in order to bring
these three essential requirements into line
during construction, project engineers from
PERI Argentina have developed a customised
formwork and scaffolding concept.The longi-
tudinally-moved table solution is positioned
on an intermediate platform and facilitates
fast cycle sequences for constructing the
16m long casting segments across the entire
width of the structure.
The form-giving formwork units are
mounted on slab tables which can bemoved
on an intermediate level to the next section
by hand with the help of the PERI trans-
portation trolley. On the basis of the VARIO
system, using timber formers and a VARIO
raised formwork construction, the precisely-
shaped formwork elements were delivered
prefabricated to the construction site. These
are connected to form large-sized, up to
24 m² table moving units using MULTIPROP
shoring towers. Articulated couplings ensure
extremely tight connections between the
VARIO elements.
Flexible scaffold sub-structure
A PERI UP Rosett Flex scaffolding structure
and the MULTIFLEX girder slab formwork
system form largeworking and support levels
at heights of 13 m and 16 m. The support-
ing system is based on type-tested PERI UP
shoring towers which are connected across
the entire width of the building and form a
96,5 m long framework unit. While the
1 m standard width of the shoring sections
remain largely constant, the bay widths
of between 0,75 m and 1,50 m – using the
25 cmgrid system– in the directionof the sec-
tions were flexibly adapted to accommodate
the loads that have be carried. Through the
modular design, not only can the variously
stepped, partially-inclined contact surfaces
be taken into consideration, but also two dif-
ferent platform heights can be formed with-
out having to break up the spatial bracing
Efficient construction of undulating roof
An undulating roof structure is being formed bymeans of longitudinally
movable slab tables at a height of 20 m. The project solution
developed by PERI's Argentine engineers fulfils the high architectural
concrete requirements as well as maintaining the short construction
period from an economic point of view.
For forming the undulating roof construction, movable slab tables on PERI UP intermediate platforms are being used. (Photo: PERI GmbH)
LEFT:
Rentable VARIOKIT and MULTIPROP system components form the site-compliant basis for the movable, form-giving slab tables.
RIGHT:
Due to the metric
basic grid dimensions, the PERI UP Rosett Flex scaffolding sub-structure could be optimally adapted to suit the different contact areas.(Photos: PERI GmbH)
projects & contracts
I
