Cedric Price’s Market Stall. Proto-type

Markets with ‘temporary’ stalls are common sight in most of the country. Some Market Squares which open frequently have now fairly rigid and semi-permanent structures to provide shelter to stalls and often the customers. The traditional wheel barrows with a light weight roof can still be seen where opening hours are limited and a swift removal to clear the streets is essential, but this mostly applies to fruit and vegetable like produce.

There are more and more specialist stalls serving a variety of food, electronic goods and even Barber shops. The frequent rain inevitably creates water pools in fabric roof and canopy structures and the sight of stall holders trying to use poles to push the water puddles often create sudden water falls on or near customers who are used to weave their way as seasoned market users.

I do not know who came up with the idea in Westminster City Council to ask Cedric Price to improve the streetscape and propose design for a flexible market stall in 1987, but it was a brilliant move. This is the kind of project Cedric Price would have welcomed as a real challenge as the end product had to be light-weight, secure, moveable and able to offer a flexible multi-functional combinations of use as well as offering shelter to the owners and the public being served.

Price came up with a steel framed hinged box on a wheeled structure which was self bracing in any position. The stall offered generous canopies on all four sides and were capable of operating in different combinations and linking with other stall canopies, to offer naturally ventilated covered walking and shopping areas. The taut canopies stopped flapping noises and avoided formation of water pools above walking and serving areas.

The ply panels were fixed to side of steel frame forming a back to the PVC polyester coated fabric in closed position and were also used for counter-tops.

The stalls were able to be folded down locked up and towed away quickly and easily.

Apart from the proto-type shown in AJ it is not known if more of these stalls were ever built and used.

Information and stall photos attributed to an article by Susan Dawson published in AJ 5^th September 1996.

Archigram to Banksy

I bought Archigram magazine as a student in 60s and being an ardent follower, attended as many of their events as I could at that time. Architectural Design used to cover their work regularly and had a big readership among students.

I have been putting occasional scanned images from my Archigrams on Flickr site since 2008 (before the Archival Project existed) and recently a Blog for Archigram Monte Carlo 1969 competition entry published in AD of January 1970.  Both my Flickr site and Blog have no commercial slant and simply aim to bring Archigram (and other architectural work of note) as a study resource easily available to the new generations of architectural students and teachers every where in the world, who may know little about the scope of their work and tremendous impact this group made on second half of 20th century.

Having a quick look at the ‘views’ recorded for my Flickr and Blog site for Archigram’s work, I can confidently say that figure is around 50,000. The hits come in clusters and it is not difficult to guess the part of the globe (Papua New Guinea to Peru) where some architectural student class is currently studying some aspect of Archigram’s work by looking at the viewing records against the global time differences

I do ‘smell a rat’ when all of a sudden I am approached by a ‘publisher’  talking about ‘infringements of copyrights’ as I see some kind of profit motive lurking in the background. I know enough about these issues including character and purpose of my web sites at the same time I would hate to do anything to upset either the ‘Archigram Archives’, any original architects or their heirs who are the owners of the copyright. If any of these find any use of the images on my sites offensive, damaging or unacceptable in any way, please write to me as I would withdraw any offensive image or make suitable amendments.

‘Slave Labour’photo by Nigel Howard for London Evening Standard.

Arcives are here: http://archigram.westminster.ac.uk/

Crematorium, Crownhill, Milton Keynes. An homage to Louis Kahn.

The high quality of architectural and planning output during inception, birth and infancy of Milton Keynes was not accidental. Derek Walker led a gifted team of professionals working with him in MK Development Corporation and commissioned good architects of international and national repute to build housing, civic and other building types within the city.

The demise of MKDC in 1992 and subsequent political changes started to dismantle the architectural department within the Council which was supposed to take over and supervise the responsibility of completing the growth of the city.

The financial constraints and changes in house building/selling sector started a race to build to obtain biggest profits and financial savings without much regard for sensible commissioning in order to obtain the best possible architectural quality to fulfil the original goals of design and planning.

The decline in architectural standards is so overwhelming that the earlier levels of ‘acceptable/mediocre’ can now easily pass as ‘excellent’ and if anything of some merit is built, it is welcomed with disbelief and needs celebrating.

The building of Crownhill Crematorium is such an example where a series of happy coincidences led to ‘birth’ of a building dealing with the emotional issues of ‘death’.

The so called birth took place in the back seat of a taxi (assisted by the father) as it was rushing to reach hospital.

Adrian Morrow, the young project designer with an impressive list of buildings to show against his name and a long list of first class architectural practices he has worked for, happened to be working in Architects Department during its death throes when this project arrived on his desk. The rapid population growth of the city meant that the existing crematorium built in 1982 by Roger Hobbs was unable to cope with the increased demands.

Adrian Morrow’s commitment to good architecture must have speeded his efforts to complete work on Crematorium detailed design, fighting against uncertainty of existence as Council’s architect. The new energy regulations and sustainability issues were dealt with and working drawing stage completed speedily before the inevitable ‘Project Managers’ took over the job and Council’s Architecture Department’s ‘life support’ was withdrawn and unwittingly the department became the first candidate for cremation in the new building (metaphorically  speaking of course, just like Asplund’s  in Woodland Cemetery).

The opportunity of seeing a worthwhile building in Milton Keynes after a while is too good to miss. It may not be able to withstand a direct comparison with Asplund-Lewerentz’s Woodland Cemetery in its scale, masterly handling of landscape and classicism of Swedish vernacular but there were lessons to be learnt.

The comparison with the other famous example of Funerary buildings, Scarpa’s Brion Family Cemetery (1968-78) would be grossly unfair at various levels but relevant when considering the experience of family and friends during emotionally traumatic occasions when the intimate internal and external spaces are able to offer solace and contemplation to affected users.

However, since the architect fairly and openly acknowledges Louis Kahn’s Kimbell Art Museum as the main inspiration for this building, a few related things are worth discussing.

Like most architects of his age, Adrian Morrow knows and understands Kahn’s work, (as Charles Correa’s use of Kahn’s Trenton Bath House at Gandhi Ashram in India) chose to use Kimbell’s vocabulary of concrete vaults with flat roofs to create ‘servant and served’ spaces. A good model to follow, as judicial spacing of vaulted roofs proved flexible to cope with varying and sensitive space requirements of the brief for internal and external spaces.

The roof was originally designed before the sustainability requirements imposed rows of wind catchers. These clusters distract the eye from the simplicity of extruded vaults used by Kahn, but since the intentions are noble and a touch of ‘science fiction’ adds an extra layer of experience, I find it more than acceptable.

My main disappointment lies with the way the car park sits in front of the building dominating the approach and exit for the mourners. The act of approaching the imposing entrance vault through cars looks abrupt and cluttered. Similarly the car park dominates the view as you leave the chapel using the side exit via an intimate well designed landscaped courtyard, created by parting of two vaulted roofs. The marrying of cars building and landscaped/water side walk is unresolved and to a degree lets the project down.

The experience of washing your hands using the warm water in the toilets attached to the entrance vault on a cold morning was even more satisfying knowing that the source of heat for this water was provided by recent departed ‘user clients’. You can’t but say “Thank you and Thank you God for effective recycling….”

Adrian Morrows web site with a video:

http://www.ajmarchitecture.com/envprojectajm.html

An excellent video showing Scarpa’s Brion Family Cemetry;

http://architechnophilia.blogspot.co.uk/2011/12/carlo-scarpa-brion-tomb.html

PREVI Experimental Housing Project, Lima, Peru. Part III

Earlier blogs have already looked at 4 submissions from internationally invited architects, this third blog looks briefly at other remaining entries, looking at their proposed designs and main objectives. Let us start by looking at 40 years of growth, starting as ‘immaculate architect deliverd new born babies’, growing out of their original clothes (as intended) and covering their bulging bodies with colourful and attractive garbs to feel good, comfortable and impress others.

Candilis, Josic, Woods    (France)

The housing structure is a system of walls defining built and open spaces.

There are two different width of bays, smaller one is 2.7m wide, can be entirely covered forming single or two storey accommodation, the wider bay 4.5 m wide, forming courtyard, patios and living accommodation in different combinations to suit immediate and future needs of occupants. The land can be traded off between adjacent owners to suit their particular needs.

The basic units at the start are all of equal size consisting of two small bays and one large one, and come ready with masonry walls, slabs and concrete beams with water  and drainage points and a certain amount of space is enclosed.

The streets serving the dwellings can be orthogonal or diagonal interdisperced with public squares and gardens. Shops can be formed within individual dwellings as happens in existing barriadas.

In early stages of development private cars may be limited to perimeter of the housing area, while service vehicles will use pedestrian ways but these arrangements can be readjusted to suit future car ownership demands.

Charles Correa   (India)

Correa said that the project grew from the following four objectives:

(1)   Highest possible density commensurate with (2) Individual landownership;

(3) Minimum road and servicing cost; (4) Pedestrian /vehicle separation.

An arrangement of narrow row houses with access at both ends provided the logical answer both to vehicle segregation and minimization of service runs with porches and backyards acting as transition areas between pedestrian and car access and the interior of the houses along diagonal road and footpath routes so as to exploit the prevailing wind for ventilation purposes – aided by airscoopes over the central area of each house – and to achieve optimum orientation with respect to sunlight. Tree planting along pedestrian and service roadways can be employed to modulate sunlight and natural ventilation as well as traffic noise from the central thoroughfare.

The service structure of schools, shops, and church and recreation areas is strung out in a disjointed diagonal moving in the opposite direction to the footpaths and roads. They take the form of the covered shaded areas set in well ventilated clearings and can be easily reached on foot as they can be by vehicle. The shops can be serviced from cul-de-sac service roads. From individual porches one can walk along pedestrian ways until these join the central spine of patios culminating in the central church and shopping area.

There is a single underpass linking both halves of the site across the central area.

The houses themselves are designed in such a way that they can either be built by their future occupants, with the assistance of the authorities as regards prefabricated elements, subsidies, skilled labour etc.: or they can be completed by the authorities themselves and sold to individual families. The former option would allow greater flexibility and, bearing in mind the efforts have been made to minimize the number of constraints that would be necessary under the circumstances.

Narrow plots resulting in narrow frontages, in architects mind ensured that the façade to be ‘controlled’ was very small and set well back into the porch.

The short span housing offered considerable structural flexibility which could be exploited by the occupants. Further flexibility was offered by building the first stage development to be on ground floor, incorporating a front porch, living/dining area, bedroom, central patio, bathroom, kitchen and a small service patio at the rear. This was considered sufficient for a young family with one or two children. The future stages could add first floor bedrooms and bathroom.

Correa’s ‘interlaced’ scheme generated by the saw-tooth configuration of the anti- seismic outer wall is orientated along the axis that is most conducive to natural ventilation. The major changes have been made on the scale of the city block. Individual owners have now aligned their units along the street front.

“Without malleability you can not have cultural expression-

all you can get is a top-down notion of how people should live” C.C.

Esguerra, Saenz, Urdaneta, Samper   (Columbia)

Project tries to create neighbourhoods units with high densities/low rise but individual ownership. This approach also reduces combining services and communications. The supervision of open spaces, security of motor cars, play areas is also assured through this community spirit.

Individual plots are square maximising the flexibility of layouts, reducing party walls, enclosing pedestrian routes with easy access to cars.

There are 20 unit designs available depending on locations within layout, service areas and staircases. The following standard structural components using a 50 cm module are extensively used;

1. A standard pre-stressed concrete tee beam and accompanying hollow brick infill elements.
2. Prefabricated concrete lintels and porch section and perforated bricks.
3. A standard open web steel roof joist with steel support columns to support ‘Eternit’ roof sections.
4. Standard prefabricated sinks, wcs, washbasins and showers.
5. standardised water, gas and electricity installations.
6. Metal doors and window frames and terrazzo stair treads.

Oskar Hansen and Svein Hatloy   (Poland)

Earth banks and areas of planting protect the project from the main traffic route.

This scheme avoids using neighbourhood areas as the scheme avoids the formation of hierarchical structures and offers parallel opportunities for all.

Each single unit is placed in close proximity to a sheltered open space to allow free pedestrian movement and play spaces near homes. These paths/private open spaces are connected with the central servicing zones ensuring a steady pedestrian traffic.

All houses are within ten minutes walk from the central rapid-transit route with adjacent parking areas, services and recreation facilities. Construction is intended to be gradual (north-east corner to south-west) to enable progressive occupation without excessive disturbance.

The dwellings are designed to be built in two stages in variety of ways, the first consist of primary structure, building the prefabricated concrete elements placed by a three-ton crane. The secondary structure stage of completion is carried out by tenants themselves by using lighter elements of clay or concrete blocks, lintels, wall panels, partition, windows, woven fibrous screens and textiles, all capable of assembling in number of combinations to suit occupant’s needs.

The structural walls incorporate storage recesses with doors and ventilation to open air, while shaded areas cool ingoing air.

The open nature of plan still provides acoustically quiet areas in the centre of the house, where the private rooms are situated.

J.L.Iniguez De Onzono and A.Vazquez De Castro   (Spain)

The site is divided into ten neighbourhoods, each of about 500 dwellings.

A 3 m wide main pedestrian street runs centrally connecting groups of dwellings.

Groups of one-family houses are standard plans around internal and service patios.

Upper floors are planned alongside access alleys. A circular staircase links the two floors.

The structural system of prefabrication provides a series of permanent shuttered elements for poured reinforced concrete (walls, pillar, and beams).

Toivo Korhonen   (Finland)

The main structural grid used is 36m x 36m, derived from practical requirements. The structural grid is separate from the internal module making it independent from internal additions and changes.

The plan of dwelling type is based on a functional separation of service and kitchen spaces, general spaces, and sleeping spaces. This offers maximum flexibility to suit future needs of occupiers who will determine the forms themselves.

The boundary walls of all dwellings are built first. The simplest dwelling thus consists of an undivided space, with water and drainage laid on in the service yard, which at the outset will serve as a kitchen. From this starting point the owner fills in and extends his house. Sanitary and Kitchen fittings are fixed using standard components. Services are grouped to avoid long installation runs.

The structural system has shallow concrete foundation pads, a floor slab resting on the ground and concrete columns and beams, supporting a corrugated asbestos roof.

All basic dwellings are single storey, when the upper storey is required; the original roof acts as shuttering for concrete.

There is no traffic within each developed area, apart from service traffic which penetrates on several wider roads. Parking areas in the first stage are mainly reserved for public buildings.

Aldo E. Van Eyck  (Netherlands)

The urban structure formed by the housing is derived from a clustering principle which operates independently of the dwelling type employed. The plot shape does not correspond to the octagonal shape of the houses, so squares, rectangles, rhomboids and free forms could be employed with equal ease. The chief advantage of the hexagonal house with its low perimeter wall is that it discourages further building by the inhabitants in any direction which would result in the loss of external spaces or internal light a frequent development in self-build barriada housing. In this sense the houses are designed so that further free development cannot work against the best interests of the occupants.

The layout is characterized by thick bands of clustered housing separated by a small number of roads placed as far apart as possible. Each band is six plots deep presenting a wall of houses made up of rows of six and two, or five and three dwellings, to the principle avenue, which is itself developed more or less symmetrically so as to achieve a more monumental character. The access footpaths serving the bands of housing have a more informal aspect which clearly differentiates from the main thoroughfares. Climatic considerations affected this layout as traffic – which is insensitive to climate – runs from east to west, whilst the pedestrian footpaths run south-east to north-west or north-east to south-west so as to take advantage of cooling breezes during the hot summer. Protection from a winter winds is achieved by means of the block staggering shown on the plan.

The arrangement of paths described above allows the breeze to penetrate deep into each band of dwellings, a process facilitated by the lateral staggering of the houses. Both house types1 and 2 are designed to take advantage of this air movement by permitting through ventilation to all interior and exterior private spaces. The triangular patios discourage building over in the manner described above, so that the achievement of a genuinely urban character – instead of a suburban – can be realized. All schools and service facilities are accessible along the diagonal pedestrian paths whilst a variety of safe play spaces for children, communal lawns, plazas with fountains and other open spaces are grouped at the ends of the footpaths in full view of all houses for security.

Car parking is provided along the principal avenues and also in certain areas off the footpaths.

In the design of the houses an effort has been made to avoid the appearance of an industrially produced minimum house – which carries with it a stigma not easily overcome by the inhabitants of former barriadas. Instead an effort has been made to build a measure of flexibility into dwellings which can not only interpret traditional and modern living styles but also adjust to different room arrangements corresponding to individual family requirements.

“It would be a grave error if pre-designed and partially pre-constructed urban environments such as this pilot project proposes should counteract the growth and development of the barriada idea and practice, instead of stimulating it through the erection of improved dwelling types, construction systems and overall community planning.”  A.v.E.

Prior to taking part in the competition Aldo van Eyck visited Peru where he observed that in local houses women were at the heart of the home, he placed the kitchen in the centre of the floor plan. He also took a more proscriptive approach to how the owners should expand, creating diagonally walled courtyards to discourage people building on top of them. He failed of course. Outside space is not sacred to a family of eight with another generation on the way.

One of my favourite photos from Domus shows this combinaton of  sophisticated Danish technology, precision and grace, embellished and enhanced by this proud couple, who met Knud Svensson as they occupied this house they adored from the first day. Architect promised that one day he would come back to build them a first floor extension to match what they liked, but unfortunately that never happened.

Collective/Community External spaces in PREVI

“Though many years have passed, bearing in mind the premise that Peter Land’s team addressed the influence of each participant throughout the design process, the composition of these elements suggests the contribution of Aldo van Eyck.
This assembly of highly static, geometric abstract objects, their gravity-defying impression of lightness and the sculptured border all recall the playgrounds of post-war Amsterdam designed by Aldo van Eyck for Amsterdam’s Department of Public Works. Van Eyck addressed the issue of interstitial voids and defined space and place, producing interventions that were both numerous and ephemeral. His ambition of creating a space for children that was “more durable than snow” was realized in the desert of Lima.
It is surprising to note how the constant transformation of the housing units distracted architecture reviewers, while the collective spaces attracted hardly any attention. The collective space, immaterial and flowing, is the most determinant and lasting element of the PREVI.” Quote from an excellent dap paper Issue 9 by Marianne Baumgartner on collective spaces. http://www.architecturalpapers.ch/index.php?ID=90

“EL TIMPO CONSTRUYE! TIME BUILDS” by Fernando Garcia-Huidobra, Diego Torres Torriti and Nichlas Tugas Barcelona 2008. A rather difficult book to get hold of, but I understand most of the Domus graphics and details are attributed to this book

Domus April 2011, report by Justin McGuirk.

Julian Salas & Patricia Lucas from openhouse international vol 37 No 1 ‘The validity of PREVI, Forty years on.

PREVI, Experimental Housing Project, Lima Peru. Part II

Short description of 3 winning entries (Atelier 5, Kikutake-Kurokawa-Maki and Herbert Ohl), and one entry (Christopher Alexander) supported by a split jury.

Having covered the background of PREVI, a glimpse of the competition Brief and the resulting buildings, with particular reference to James Stirling’s proposals, were explored in my first Blog, now I would like to go through the original winning entries and their progress over last 40 years.

You would recall that the jury chose 3 winning projects from 13 International architects in 1969. Atelier5; Kikutake-Kurokawa-Maki; and Herbert Ohl were the official winners but there was a split in the jury and Centre for Environmental Structure by Christopher Alexander was considered by this jury to be worthy of a winner.

Jury thought that Atelier 5 scheme used an interesting method (possibly economical) of construction using pre-cast concrete panels small enough to be built on site and manhandled for wall and roof construction. They considered that two storey house plan appeared complex with patios and internal spaces. The external communal spaces and separation of traffic was well liked.

In a recent interview Alfredo Pini of Atelier 5 said that their invitation to PREVI was a result of their successful Halen project. They were full of praise for the aims, objectives and the process of the competition. The implementation of their 25 units took place in accordance with their plans but the distance and complexities made the involvement difficult towards the end. They were pleasantly surprised to see the attention and care given to external public spaces after decades of use.

Pini did not consider the present situation a chaos – “…it is a fine chaos. I have nothing against it – in fact, I positively like it. That is a positive drive…. The extensions and interventions of inhabitants were quite good.”

Kikutake, Maki and Kurokawa and Associates also used pre-cast concrete system with different loadings which also included foundations, again considered well worked out and likely to save costs. House plan grouped service areas with potential of local industry producing equipment/units for Kitchen, Toilets and storage in future.

The external spaces in this scheme also separated cars from pedestrians but some jury members considered the spaces were possibly too extensive for effective use.

Fumihiko Maki in a recent interview recalls the original brief. The large growing families would reflect the growth of houses, an important metabolist concept. He welcomed the changes to the houses but was concerned about the extra floors being built on modest original foundations in an earthquake zone.

Herbert Ohl scheme was problematic from start. Design was sophisticated use of extensive large pre-cast elements using complex arrangement resulting in a shell which could accommodate internal changes with ease and flexibility.

There was proposal for an underground ‘service spine and car parking’.

Minority jury disliked Ohl’s scheme and considered it regimented, inhuman and expensive.

The ‘travelling crane’ in their view became a designer rather than a useful tool.

Architect anticipated a democratic interchange between human and technological factors, stimulating multiplicity, flexibility, micro and macro relations; … all using dimensional and functional modules. The mobile crane was able to provide universal frame structure at any time without disturbing the community.

As feared, the complexity and difficulty of producing even a small part of this scheme failed to be built in the ‘sample’ project constructed under Peter Land’s supervision.

The science fiction approach may have been exciting to explore but was very unrealistic and removed from the objectives of the competition. I am surprised it was one of the 3 schemes chosen as winners.

Interview by Martanne Baumgartner and Tomeu Ramis, ETH Zurich.

This split jury thought that Christopher Alexander’s proposal was a ‘milestone’ which addressed the brief and Peruvian conditions and produced an imaginative solution for low income housing and offering maximum freedom of individual choice. The praise continued “….a freshness of approach, a commitment to the dignity and worth of individual , a recognition and understanding of the complex linkages between the individual, his family, his belongings, his neighbours and the entire community are implicit in each part of this proposal.”

The building system uses fewest standard components to provide maximum variety and choice of solutions… the proposed use of bamboo, urethane, and sulphur structural members may not be new or proven but was in keeping with the spirit of this competition.

It is difficult to explain the concepts behind the ‘cell structure’ of the housing layout in this short introduction but it is a fascinating report to study if you can lay your hands on it.

The house layout considers various traditional aspects of Peruvians social/living habits.

The house construction was aimed at using local materials and traditions where possible. The foundations were floating slabs supporting load-bearing walls and a lightweight plank and beam floor/roof. An ingenious interlocking mortar-less concrete-block for wall construction, reinforced with sulphur, with cavity for plumbing and conduits. The planks and beams are made of urethane foam-plastic and bamboo, reinforced with sulphur-sand topping; all are earthquake resistant methods of construction.

Information attributable to the following sources;

AD 4/70, Competition drawings and Thick Walls AD Feb 1968; Domus, April 2011,’ Metabolist utopia’; ‘The validity of PREVI, Lima, Peru, 40 years on’ by Julian Salas and Patricia Lucas.

PREVI, Experimental Housing Project, Lima, Peru. Part I

Introduction to Architectural competition, Brief and building of samples of entries focused on James Stirling’s proposals. 1965 to present.

“PREVI, Spanish initials for “experimental housing project”, was conceived in Lima in mid 60s. In 1965 Peru’s Architect president Fernando Belaunde Terry began consultations to explore the ways of controlling the flow of people seeking urban living and spread of self-build informal barriadas in urban Peru. The proposals were submitted to UNDP in 1966 and approved in 1967. The work started in 1968 with the intentions of carrying out three pilot schemes over three years.

Three original winning schemes could not be built in accordance with earlier intended scale or details. In the end jury decided that the best way forward was to build all 26 submitted proposals because of their high quality. Most of the competition invitation work and implementation of building of 24 out of 26 schemes was masterminded and overseen by the British Architect Peter Land.

The forty years that have lapsed in the interim and the ongoing transformation of the homes by their dwellers afford an opportunity to reflect on the suitability of the construction technologies proposed in the competition. Ongoing growth and the rationalization of construction methods were two of the basic premises underlying the competition. The remodeling that has taken place in the interim stands as proof of the success of the first premise, but the use of traditional techniques to build the additions calls some of the most sophisticated proposals for industrialization into question. At the time, the tendency was to rely on large-scale industrialization, as can be seen in the German, British and Polish architects’ proposals. Nonetheless, many of the PREVI proposals opted for rationalizing construction and precasting short series of small elements, rather than huge three-dimensional members. In the situation presently prevailing in Latin America, the viability of some of the technological proposals deployed in the PREVI might be profitably revisited.”

Abstracted from a paper by : Julián Salas and Patricia Lucas  (Italics additions by self)

The process of building in PREVI was originally intended for large scale provision of housing, which was to create a transformable core model with one room and provide basic utilities for the unit. The idea was that the new owners were free and encouraged to expand in accordance with the needs of their growing families and their own financial situation.  In these new projects the hope was that rather then using salvageable and recycled materials suitable and dependable construction would be used and paid for by the owner/occupants. This process allowed the owners tenants to control their own social, family and cultural needs making them more involved and motivated towards the project. It was also hoped that the ideas generated by the competition would introduce new methods of creating energy efficient, seismic resistant and cost effective building techniques.

The architects and project managers under the lead of Peter Land took a holistic approach in building the fruits of this rare International competition for social housing.

“If Weissenhof Siedlung is the natural childbirth of social housing in the First World, PREVI is the coitus interruptus of Third World housing”

I sincerely hope that success of this project (although far from pretty in comparison with seductively dressed social housing schemes on offer in better-off countries) hidden in a remote part of world will offer useful lessons of construction and design to professionals and students with strong social conscience. The lessons should be absorbed and filtered down to educational curricula throughout the globe to inspire future generations of architects in solving the international housing dilemma facing millions throughout the world.

General notes.

The Government of Peru formulated an experimental project in housing which had an objective of developing new concepts of forming experimental neighbourhoods and techniques utilizing Peruvian and foreign experience. In 1965 its Architect president Fernando Belaunde Terry began consultations to explore the ways of controlling the flow of people seeking urban living and spread of self-build informal barriadas in urban Peru. The proposals were submitted to UNDP in 1966 and approved in1967. The work started in 1968 with the intentions of carrying out three pilot schemes over three years.

In PREVI, 13 internationally renowned architects were commissioned to develop prototypes of urban housing that would internalise programmes for any future transformation. Thus each unit contained the terms of its own growth, recognition of the value of the dynamic of growth adopted in the informal slums. In contrast to a growth model based on large, out of scale gestures – from megastructures to gigantic superblocks – the PREVI experiment fielded new dynamics based on a model of low-rise, high- density housing.

When in 1968 a military coup led to the overthrow of the president-architect who had promoted the PREVI project, the involvement of UN prevented the project’s cancellation.

The jury met in 1969 and having chosen 3 winning projects from 13 International architects ( Kikutake-Kurokawa-Maki 4; Atelier 5 and Herbert Ohl), resolved to initiate the construction of all but two of the proposals in 1974, the first phase of 500 units was finally built and left to its fate of growth and progressive oblivion.

The 13 invited International architects were; Toivo Korhonan 6; Charles Correa 1; Christopher Alexander 8; Iniguez de Ozono  & Vazquez de Castro 10; Georges Candilis; Alexis Josic; Shandrach Woods 13; James Stirling 7 ;  Esquerra & Samper 2; Aldo van Eyck 9; Kikutake, Kurokawa & Maki 4; Svenssons 3; Hanson & Hatloy 11; Herbert Ohl 12; Atelier 5 5. (Jose Antonio Coderch from Spain was one of the Jury members)

The numbers after the name refer to general layout marked with numbers. The brown areas on the layout indicate subsequent additions extending the original built forms.

Summary of the brief.

Mandatory requirements were that each dwelling plot was to be between 80-150 m2, of which dwelling was to occupy between 60-120 including all floors.

The buildings initially were to be 1 or 2 storeys designed to support the third floor and were to be based on100 mm module. The ideas were to explore and develop techniques in architecture and construction within general area of low rise, fairly high density and compact housing in terraced, row and other formation. High rise developments were ruled out.

Detailed designs of dwellings were to be submitted with only a schematic general design for the community. All dwellings were to be flexibly planned for eventual accommodation of eight children of different ages, and one elderly couple, in addition to the owners.

Each dwelling had to provide living, dining, kitchen, bedroom(s), bathroom(s) and service patio. The relationships between rooms and external spaces were defined. Roof areas were required to be suitable for outdoor space.

The dwellings were to be conceived not as a fixed unit but as a structure with a cycle of evolution with appropriate construction technology to achieve this aim.

The initial basic unit was to be built by the main contractors and technical advice and assistance in building will be made to families completing their houses.

Car parking spaces were required to be on individual plots although at this time most of the families did not own cars.

James Stirling’s Proposals.

After the ‘first build’ by the contractors it was intended that the house should be completed at ground level and above by house owners in self-building styles.

The growth plan drawing shows in stages of self-building a 4P house becoming a completed ‘one storey house’ (8P+) considered the most typical method of growth. Thereafter expansion takes place on the floor above, either as a separate dwelling or, in the case of a large family, as additional bedrooms and living spaces, in which instance part of the ground level accommodation could be used for other purposes (i.e. shop or garage etc.).

When the house was at its smallest (4P), the kitchen, dining and living area were shown combined. As the house increased in size to approximately 6P the dining and living areas were separated from the kitchen by a wall and doors. This wall (knock-down or moveable) appeared in a new position when the house becomes 8P and 8P+, increasing the living space of the house as the family size grows.

Each house had two front entrance doors. One door led directly into the living area (social/traditional), the second (functional) into the house circulation area leading via the staircase and garden patio through to the service patio.

All rooms were planned with through ventilation i.e. separate openings on opposed walls to create cross draughts.

The ‘first-build’ by the contractor takes advantage of the large-scale initial production (cost and speed of erection) and was an assemblage of precast concrete walls and floor units. Party walls and outside perimeter walls were of sandwich construction and were precast units rising from ground beams incorporating windows and door openings and also parapets – these were crane erected.

Roof/floor units were lightweight r.c.beams with hollow pot infill which could be man erected allowing self-help methods of construction t as expansion was required.

Just as the individual rooms of the house were grouped around the garden patio, similarly the various sizes of house groupings were linked with differing scales of social and community space.

The hierarchy grew from the individual house to the immediate neighbours by making an initial group of four houses above common party walls (and common services) grouped around the service patios. These clusters of four house units were then grouped around a common entrance patio forming 20 or 21 houses. Thereafter this larger group becomes the basic cluster unit forming the neighbourhood (approximately 400 houses) and was related to access roads and car parking. There are four such neighbourhoods the allocated site area (1500 houses) and each is separated by a Public Park (planted, informal garden valleys) in which were to be sited the schools etc.

Flanking the approaches to the neighbourhood parks and enclosing the end of the housing areas were reserved for commercial buildings, shopping and community centres.

Stirling in 60s.

James Stirling was well informed as far as CIAM and its views on housing were concerned. He had already carried worked on proposals for a village scheme using vernacular and simple construction. At this time Europe was swamped with large concrete panel housing construction showing off their economy due to scale and rapid construction. Stirling had already seen this in action on his own Runcorn scheme, disliked by most users and demolished within few decades. Some of the wiser architects at this time were already aware the inflexibility these systems would left for future generations, the of a simple RC Frame skeleton for Park Hill is the sole reason for its re-use by Urban Splash at this very moment.

To be fair to him, the Brief originally intended to build huge chunks (up to 1500 dwellings) of neighbourhoods which were feasible to build using large precast panels but uncertainty of South American politics and the difficulty of calling a huge crane for modest additions to dwellings were unrealistic proposals which people like Van Eyck and Charles Correa avoided by using small scale self-build type constructional systems.

Having made the comments above I have to point out that crafty ‘Jim’ came up with cracker of a type plan. It provided simple bases for natural growth in many combinations, providing four columns forming a permeable enclosure to the courtyard, itself a traditional feature in Peru and excellent source of natural ventilation, greenery and daylight. The originally built walls in large precast concrete panels were ideal to build against or to support any kind of future construction above these by residents. I understand a four storey structure has now been incorporated in and around Jim’s house forming a school. His signature porthole windows and rounded door heads have become a pointer to visiting architects to spot Jim’s contributions now almost buried in this DIY zoo/archaeological site this area now resembles. James Stirling would have laughed to see his original panel used in the same manner as beautifully crafted huge stone walls built by Inca civilizations were used to support later light weight structure for centuries after the original construction. This is what I would suggest a good example of history repeating itself.

“James Stirling interpreted the future behaviour of the families with certain amount of accuracy: Stirling houses were the most requested and those that display PREVI’s finest qualities of occupancy” Garcia-Huidobro, Torriti & Tugas.

 

Summing up can be best by quoting from Justin McGuirk’s article in Domus, April 2011, ‘The metabolist utopia’.

“Some of the houses are extraordinary works of transformation whose occasionally surreal suburban grandeur belies their setting. Tinted windows and hacienda styling many not meet with architects’ approval but they speak volumes about owners’ pride and aspirations. Therein lies one of PREVI’s great successes. People didn’t move out as their financial situation improved. Residents stayed and turned a housing estate into what feels like a middle-class community.”

The details of original competition are from AD  April 1970;  abstracts, quotes, layouts and photographs from Domus of April 2011. Small aerial inset of Stirling’s housing is copyright of Peter Land. All with thanks.

Cedric Price, Anticipating the unexpected, Magnets.

Towards the end of 1996 Cedric Price explored seven projects on the theme of anticipatory architecture, which were published in Architects’ Journal of 5th September 1996. This publication was followed by an exhibition called ‘Magnet’, arranged by The Architecture Foundation held in London from 18th April to 8th June 1997.

There is hardly any point in writing anything as an explanation or summary for Cedric Price, a difficult enough task for expert architectural writers, but in my inadequate hands it will be nothing short of a disaster. My thank to AJ and Kester Rattenbury for borrowing the abstracts from their writings.