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Hamburg International Building Exhibition | 3 Sports Centre in Malilla, Valencia | 6 GAGA 2013: The Winners | 8 The spirit of Goethe | 16
International Magazine
ISSN 1363-0148
www.hdgmagazine.co.uk
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1 | The renovated and extended flak tower has become the sustainability symbol of the Hamburg IBA. The power station is open to the public with a café and terrace
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Editorial
2013 celebrated the 20th
Anniversary of our GAGAs.
our competition has gone
from strength to strength
and over 1,000 projects have
been analysed and mulled
over by our judging panels.
The diversity and range has
always been a feature of
the entries ranging from the
beautifully detailed projects
of p. Johnson and Andy Scott
to the glorious pepsi Max Big
one at Blackpool and The Eden project.
our public vote to select the Winners’ Winner from the last two
decades resulted in a large number of votes with the overwhelming
winner being South porch Gates, Scotland. Will Alsop opened the
ceremony with a confession that his GAGA galvanized watering
can was one of his favourite prizes. Gordon Talbot from Ian Ritchie
Architects emphasised the important role that galvanized steel
plays within their design philosophy.
The importance of galvanizing both from a design and sustainable
point of view is reflected by a number of projects featured in this
issue such as the peacehaven Wastewater Treatment Works that
is reminiscent of the ancient English long barrow and the new
sustainable projects from the recent international exhibition in
Hamburg.
And let’s not forget the innovative and beautifully atmospheric
sports facility in Valencia.
Iqbal Johal, Editor
Hot Dip Galvanizing – An international journal published jointly
by the galvanizing associations of Germany, Great Britain and Spain.
Edited by: I. Johal, G. Deimel, H. Glinde (Editor in Chief). Published by: Galvanizers Association, Wren‘s Court, 56 Victoria Road,
Sutton Coldfield, West Midlands B72 1SY, UK;
Tel: +44 (0) 121 355 8838, Fax: +44 (0) 121 355 8727,
E-Mail: [email protected], Internet: www.galvanizing.org.uk
Distributed in Australia by: Galvanizers Association of Australia,
124 Exhibition Street, Melbourne, Victoria 3000, Australia, Tel: 039 6541266,
Fax: 039 6541136, E-mail: [email protected]
This magazine may not be copied without the written permisson of the editor
© 2013
Photo front cover | Paul Smoothy
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What does the future hold for the 21st century city? That was the question which
the Hamburg iBa (international Building Exhibition) set out to answer, and it offers
some innovative and sustainable exhibits relating to current discussions on urban
development. Using over 60 projects as examples, the iBa shows how an ecologically
and socially balanced 21st century metropolis can arise. This sets the pattern for
sustainable inner city development orientated towards the future.
It is striking how ubiquitous the presence of hot dip galvanized steel is in the numerous IBA
structures. It is being discovered, more and more frequently, by architects who see it as a
sustainable and timeless, authentic material. Hot dip galvanized steel has been utilised to particular
effect in the Energy bunker and Softhouse projects.
Galvanizing for the 21st Century CityHamburg International Building Exhibition
by Holger Glinde
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The former flak tower has become the sustainability symbol of the Hamburg iBa.
The monument, which had scarcely been used since the end of the war, has been
renovated and extended to become a renewable energy power station with large-scale
heat storage. The bunker gave many people protection in the Second World War but,
with its flak towers, also formed part of the German war machine. in 1947, the interior
of the building was completely gutted by the British army. Only the external skeleton,
with walls and floors several metres thick, remained almost completely untouched.
The transformation from a wartime bunker into a symbol of a
renewable energy supply for Hamburg is the solar envelope, a
galvanized steel structure which is visible above the roof and the south
facade. The conversion work, with overall planning by Hegger Hegger
Schleiff HHS planer + Architekten AG, Kassel, intelligently combines
power generation from the use of solar power, biogas, wood chips
and waste heat. The thermal capacity of the collectors is about 750
kW and the output from the photo-voltaic system on the south side is
approximately 100 kW at its peak.
At the heart of the project is a large heat storage unit. With a capacity
of 2 million litres, the large-scale buffer storage unit is the central
innovation. It is powered by the heat from a biomethane-fired combined
heating and power plant (Blockheizkraftwerk =BHKW), a wood-fired
installation, and the solar thermal plant, together with the waste heat
from an adjacent industrial plant. The buffer action of the storage unit
leads to a big reduction in the generating capacity to be installed, from
11 to 6.5 megawatts, and makes possible the economic utilisation of
renewable energy within the heating provision concept.
Looking ahead, the energy bunker is
intended to supply a large part of Hamburg’s
Reiherstieg area with heat and facilitate
renewable energy into the power network.
The energy bunker is intended to supply
about 22,500 megawatt hours of heat and
almost 3,000 megawatt hours of power.
That corresponds to the heat requirements
of approximately 3,000 households and the
energy requirements of approximately 1,000
households. This will bring about a Co²
reduction of 95% – ie, approximately 6,600
tonnes of Co² per year. As a local power
station, the energy bunker is also an example
of a decentralized energy policy.
Not only is galvanized steel used to support
the external solar power structure, but it has
also been utilised for the power station and
energy supply apparatus used in the bunker,
and for stair elements and handrails. The
bunker’s history is documented in an exhibition
within the building which is open to the general
public. To complete the visitor experience,
the “vju” bunker cafe and terrace, located at
a height of 30 metres gives a unique view of
Hamburg and across to the port of Hamburg.
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Energy bunker, Hamburg
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2 | The galvanized steel structure supports a photo-voltaic system on the south facade
3 | The large heat storage unit has a capacity of 2 million litres
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Kennedy & Violich architecture‘s Soft House is one of the
so-called Smart Material Houses at the iBa. Thanks to its
dynamic textile facade, it uses sunlight in a flexible way and
is an example of sustainable construction. Each of the four,
three-storey dwellings has its own garden.
A suspended, galvanized steel structure is a central design element of
the Soft House. It anchors and shapes the textile membrane facade
on the south side of the house. Incorporated in the textile membrane
facade are photo-voltaic cells which react to sunlight, just as a
sunflower turns towards the sun. The membranes tilt towards the solar
rays, optimising the sunlight for energy production. The rippling, sail-
like facade elements also provide shade in the summer, while during
the winter, they minimise energy loss and allow light to penetrate
more deeply into the rooms. Flexibility of the system also allows the
residents to choose their view.
Movable and translucent curtain walls are used internally, making it
possible for the residents to structure the generously-sized inner rooms
and to vary the layout at any time, aiding regulation of heat and light.
The power generated externally through the membrane facade is fed
directly to the curtains, so that they provide an additional option for
lighting for the inner rooms through built-in LEDs.
Photos | IBA Hamburg, Martin Kunze (1, 2, 3, 5) IBA Hamburg, Bernadette Grimmenstein(4)
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Soft House
4 | A galvanized steel structure is the central design element of the Soft House. It supports and shapes the textile membrane facade which contains the photo-voltaic cells
5 | Not only do the sails provide shade in the summer and minimise energy loss in the winter, but the owner can adapt the views due to the flexibility of the system
+ additional
pictures
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Perforated 3D facade
The Malilla Sports Centre in Valencia forms part of an important urban
infrastructure plan managed by the regional government. The project is
based on an initiative from the Valencia Municipal Sports Federation,
which has been taken up by the Valencia Region Sports Council, to
develop the existing facilities in this suburb. The project was designed to
meet within the strictest architectural and technical standards laid down
by the regulations currently in force.
CMD Ingenieros, appointed as main designers, wanted to create a building that not
only adhered to the strict guidelines but also wanted to create a facility that moved
away from a standard design philosophy. Innovative can be aptly used to describe
the finished structure; covering a total area of 6,000m² on a quadrangular plot, the
new facility houses a full-size football pitch, a near olympic-sized swimming pool
and a gymnasium. The building is divided
into two distinct parts. The southern half con-
tains the football pitch, the locker rooms and
cafeteria. In the northern half are the pools,
the remaining sports facilities and the office
space.
The main structure is based on a simple steel
frame and prefabricated reinforced concrete.
However, unlike many buildings of this type,
the engineers have created two aspects that
make this project stand out of the norm; the
main building roof is given a jagged interior
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by Javier Sabadell
Sports Centre in Malilla, Valencia
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the building throughout the day
and three quarters of the site
is wrapped in a prominent skin
that defines the volume. The
meandering skin is made from
perforated galvanized panels
supported off a galvanized steel
structure. This mini facade that
envelopes the buildings helps
to filter sunlight while maintai-
ning the privacy of the interior
rooms. It also helps to create
an interesting texture to what
may have been a fairy stan-
dard finish to the facade. The
perforated panels have abstract
shapes designed within them
that add an almost 3D illusion
of depth and movement. This is
accentuated in the evening by
the direction of light falling onto
the screens and soft internal
lighting from within the building.
Internally, the leisure centre fol-
lows a clean modernist theme.
An additional feature is added
by a facade that runs the total
length of the main building.
Formed using a combination of
a galvanized steel frame and
a mixture of different coloured
glass panels, this forms a unique
internal space. The shimmering
colours that are created as light
refracts through the glass helps
to create a magical mixture of
colours that changes throughout
the day.
Energy saving technology has
also been employed throughout
the project. The ventilation
systems are fitted with heat
recovery equipment in order to
recover thermal energy from
the extracted air. The de-humi-
dification of the swimming pool
area has been designed in such
a way that, when external con-
ditions permit, cool air is drawn
into the building saving on the
need to switch on the cooling
compressors, thus saving more
energy.
A vibrant colourful space has
been created by this simple, yet
unusual take on a leisure facility.
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1 | The length of the facade that runs along the swimming pool creates a magical mixture of colours
2 | Abstract profiles of a sporting nature create interest for visitors
3 | The galvanized perforated panels add an almost 3D illu-sion of depth and movement
4 | A combination of a galvanized steel frame and a mixture of different coloured glass panels creates a unique internal space
5 | The double, outer skin also helps to create an interesting texture to what may have been a fairy standard finish to the facade
Photos | GAD Arquitectura & Jorge Ramírez
+ additional
pictures
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Galvanizing in Architecture Shatwell Farm, Stephen Taylor Architects
At Hadspen, a 750 acre estate in Somerset, one of the dominant
topographical features is the valley that runs south from the
main house to the farmyard at ‘Shatwell’. As part of an overall
restructuring of the buildings of the farm and the spaces
between them, the new cowshed, measuring 42 metres long by
20 metres wide, is placed on the axis of the valley.
Approaching from the south elevation, you are greeted by two
giant arches, one cut out of slatted timber and part of the gable,
the adjacent arch in concrete, just held within the gable frame.
The interior of the Cowshed is bright with fractured daylight
through the slatted timber screens and grid of skylights. on
entering the arches, the galvanized portal frame becomes
apparent, revealing both a modest and grandly ambitious
design. Six pens accommodate up to 80 cattle, which are graded
according to their age and size.
There is a long tradition at Hadspen which sees utilitarian
agricultural buildings participate in a careful spatial ordering
with architectural ambitions exceeding their functional stature.
Acknowledgement of the building’s civic role within the
farmstead is heightened by the craft of its heavy concrete
construction which contrasts with the galvanized steel of the
cattle enclosure. The long heritage of the estate; the inevitable
adjustments to its fabric over time and changes in use of many
of its buildings, goes some way to explain the juxtaposition of
construction elements of this building.
GAGA 2013The Winners
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Galvanizers association’s annual Galvanizing awards reached a
milestone this year with its 20th anniversary. Guest speakers and
past winners attended the ceremony at the Royal aeronautical
Society in london this summer to celebrate the calibre of entries
that we continue to receive.
The category winners of this year‘s awards highlight a number of important
trends within the construction industry. Who would have thought that a
Wastewater Treatment Works could fit so snuggly into the rolling hills of the
South Downs and a farm building that would recall the Italian palladian design. + additional
pictures
by Iqbal Johal
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Hengrove is a spectacular, multi-million
pound leisure facility, boasting a 10 lane,
50-metre olympic-standard pool with a
teaching pool and movable floor (featured in
our previous edition).
The pool has a structural steel frame with the
roof supported on cell form beams spanning
37.5 metres. The elevated “bubble effect”
feature roof over the main pool hall was also
supported on curved galvanized universal
beams set out to exacting tolerances, forming
an impressive feature above the swimmers.
The Authority requirements called for the
main structure to have a guaranteed life of
60 years with minimal maintenance; with
the corrosive chlorine atmosphere of the
pool halls, this posed a challenge to the
designers. Traditional painting methods,
utilising Chlorinated Rubber paint, were
quickly discounted due to the maintenance
regime and lack of access over the pools.
The benefits of a factory applied, robust,
homogenous finish led to hot dip galvanizing
being selected.
Photos | Liz Eve
Sustainable Galvanizing Award Hengrove Park Leisure Centre, Kier Construction
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Falmer House at Sussex University, which houses various University services and the Student
Union, was designed by the world renowned architect Sir Basil Spence in the 1960s. Brick faced
with a vault and column structure and extensive glazing, the unusual building is the first to be
seen when entering the campus. It is also one of the most beautiful campus locations in Britain,
being situated in rolling parkland on the edge of Brighton and bordered by the South Downs
National park.
When a replacement fenestration programme was proposed for the iconic building, Crittall
Windows Ltd was contracted to supply a selection of hot rolled galvanized steel profiles and
cold-formed galvanized steel doors for the project.
The window replacement scheme is part of a multi-million pound venture to upgrade the self-
contained site, which was awarded a bronze medal from RIBA for its design and architecture
and which enjoys a Grade I listed status for a development of exceptional interest.
English Heritage-approved, the profiles were the ideal choice for the replacement scheme, with
the narrow sightlines minimising any obtrusive mullions and transoms, and allowing the glazing
to blend unobtrusively into the existing architecture, enhancing its aesthetic value.
Photos | Jonathan Howell and Crittall Windows Ltd
Duplex Galvanizing Award Falmer House, Crittall Windows Ltd
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Galvanizing in Detail Malindi & Providence Houses, Simon Conder Associates
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2013overlooking the beach in the
village of porthtowan on the
north Cornish coast, these
two new houses are located
on a dramatic, south-facing
hillside. Surprisingly, for such a
prominent and relatively remote
coastal site, the new houses
are surrounded by a suburban
estate of bungalows dating from
the 1950s.
Malindi, the larger of the
two new houses is the main
family home and providence
accommodates an artist’s studio
at upper ground floor level. The
client, a couple with a teenage
son owned the previous houses
on the site. Both were much
smaller and substandard
compared to these wonderful
replacements.
Attention to detail is a hallmark
of the project, illustrated via
extensive hidden details that
include galvanized steel frames
to support the verandahs and
glass balconies both externally
and internally.
To reduce the impact of the new
houses on the landscape, both
houses are built into the 1 in 7
slope of the hillside. The two
adjacent sites face south and
this orientation has been used
to create passive solar gain to
minimize both the use of fossil
fuels and energy costs. This has
been achieved partly by fully
glazing the southern elevations
of the two houses and partly
by using highly insulated, high
mass construction for the
remainder of the two houses.
To minimize the possibility of
overheating in summer, the
glazed southern elevation is
set back behind hardwood
verandahs, which provide full
width balconies at upper ground
floor level and protect the
interiors from the high summer
sun, while allowing the much
lower winter sun to penetrate
deep into the two houses.
Photos | Paul Smoothy
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Peacehaven Wastewater Treatment Works, Bourne Construction Engineering
At first glance what seems like an ancient English long barrow set in the South Downs is actually
a Wastewater Treatment Works. The newly completed peacehaven facility not only looks great at
a distance but bears up to closer security the closer you get. The huge plant has been beautifully
engineered with its concrete bunker and steel structure nestled into the Sussex countryside near
Brighton.
The Wastewater Treatment Works is a necessary and integral element of Southern Water’s
£300m environmental improvement scheme. The overall project includes 11km of tunnels to
transfer wastewater to the Wastewater Treatment Works and then cleaned wastewater from
the works to a new 2.5km long sea outfall pipe off Friars Bay. Approximately the size of three
football pitches, the complete structure is covered by a parabolic roof that rises to a maximum
height of 18m and dips down to a height of 14m.
All of the structures consist of complex curved and domed roofs forming parabolas with curved
side walls and bull nose details. Covered in sedum, the roof blends into the South Downs, and
forms the largest green roof in Britain. The large galvanized steel structure is divided into two
parts by a movement joint located along a steel covered canopy that connects the Sludge
Recycling Centre to the larger pre-Treatment Building part of the structure, an area which sits
over the facility’s deep shafts.
Photos | Southern Water
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2013Galvanizing in Engineering
Peacehaven Wastewater Treatment Works, Bourne Construction Engineering
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The spirit of Goethe
The Berlin-based artist group Inges Idee have designed a pylon-inspired sculpture for the international art exhibition Emscherkunst 2013. Its
curved shape is half pylon, half man and recalls the spirit of Goethe, the Sorcerer‘s Apprentice. With a total height of 35 metres and profiles made
of galvanized steel, the sculpture is similar in dimension and shape to a conventional pylon.
Photo | Roman Mensing/EMSCHERKUNST
Galvanizing Delight