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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: ga@hdg.org.uk, 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: gaa@gaa.com.au

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

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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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Photos | David Gordange

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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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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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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