In view of the global resource and ecological situation, per-capita resource consumption rates in the rich world probably need to be reduced by 90%. This can only be done if there is a “de-growth” transition to some kind of Simpler Way centered on mostly small, highly self-sufficient and self-governing communities in control of local economies within a culture that is not focused on material wealth.

It is not surprising that the viability of such a vision is typically regarded as implausible. The aim of this study is to show that normal outer city suburbs could be restructured along the lines required to cut global impacts by the necessary amount, while improving the quality of life. Data on typical Australian consumption rates, food production yields, suburban geographies, etc. is used to estimate the achievable reductions.

The theoretical conclusion that such reductions could be made aligns with a study of the Dancing Rabbit Eco-village in northeast Missouri. Heavy cuts in resource consumption cannot be made without extreme change in economic, political, settlement and cultural systems.

“Of all the questions I get on Twitter the most common is this: ‘How do you build a town?’ We know well how it used to be done, but these last one or two centuries we have forgotten how to do it (with only a handful of notable exceptions during the last century).

The other day I was asked again, but this time with a set of premises that made the question a little easier to approach. I have anonymized all the details but the general idea remains: four guys (friends) with money have bought a suitably large piece of land in Texas and now want to create a car-free human-scaled town of the kind that I am always writing about.

In this text I intend to set out the most bare-bone basic premises for how to start a good town, what is needed to build something anti-fragile and sustainable under the above mentioned scenario.”

Read more: How to Build a Small Town in Texas, Wrath of Gnon, July 2021.

To create a human scaled town we first establish what is a good size, and this is simply one third of a square kilometer, or 82 acres, or 0.13 square miles. 80 acres was the upper limit for a good family farm in medieval England, and it is still the size at which the most flexible and efficient farms run, both modern and more old fashioned Amish family farms. It allows a town where no point can’t be reached on foot in 15 minutes, and it allows comfortable living for a population of 3000, which was considered the ideal size in medieval Europe: the upper limit of efficiency and comfort, productivity and harmony: more and you get crowded, less and you risk being without some important trades and activities. Even though the premise talks about a town of 600, we plan three centuries ahead for a maximum population of ca. 3000.

A good town (the urban) is clearly defined and set apart from the countryside (the rural). The suburban has no place here. Hence the town needs to be as clearly marked out and defined as the individual family lots will be: to here, but no further. For this purpose we will mark out land to be used as a wall, raised embankment, hedge, fence, moat, canal, etc. Some sort of edge which is not routinely nor distractedly crossed.

As for shape, I recommend a somewhat irregularly oval shape, near round in one extreme, or rice grain shaped in the other extreme, for the simple reason that the best towns and cities seems to be oval to some degree. As far as possible the existing topography should be kept or even enhanced. Perfectly flat land is only popular with boring developers. So: no bulldozing allowed. Existing trees should be left and existing paths should be left in place (even when slightly inconvenient). New paths and streets should follow the contours of the land. Anything historic (an old campsite, an ancient grave or remains of an old farmstead) should be kept and protected and venerated. History is in short supply in new developments, and interesting stories can be woven around something as mundane as an abandoned old cart or well.

Read the whole article: How to Build a Small Town in Texas, Wrath of Gnon, July 2021.

The Landscape Table is a platform for cultivating, processing, cooking and sharing the food at the centre of the FARMPARCK in Brussels, Belgium. Thanks to the edible and medicinal plants inserted into the table itself, the installation invites the public to meet and eat in direct contact with a landscape that is a bounty for the senses – sight, smell, touch and, above all, taste. The essence of this project is to involve the visitor in the landscape, farming, nature and cooking through shared moments.

FARMPARCK puts to the test a new model for a public space combining the characteristics of a park and farmland, where food is grown, cooked and eaten by the neighbours. There is a vegetable garden, an animal farm, a kitchen, and a compost toilet which is to transform the park’s organic waste into “terra-preta”  (black earth, a rich and fertile soil) for the park and the surrounding area. FARMPARCK, which happens in a multicultural neighbourhood, meets both social and ecological needs. It was set up as a prototype from May to September 2014, but continues to be active today. Picture: Eric Dil.

Building on statistical analysis of the built fabric of three major American cities [San Francisco, Seattle, and Washington, D.C.], the research demonstrates that established neighborhoods with a mix of older, smaller buildings perform better than districts with larger, newer structures when tested against a range of economic, social, and environmental outcome measures.”

“Older, Smaller, Better. Measuring how the character of buildings and blocks influences urban vitality“, National Trust for Historic Preservation, May 2014. Via Lloyd Alter.

The architects consider their work to be a toolbox, a starting point for thinking outside the conventional norms and recepies. They argue that decentralized services are more flexible, provide more autonomy, and are more efficient in space, energy and materials.

Antoni and Blasco present, in their own words, an equivalent to Neufert’s “Architect’s data“, the book for architects that records standardized dimensions for centralized systems. “Micromachins” is written in French but the visuals dominate.

“Micromachins”, Damien Antoni and Lydia Blasco, 2011 [download the page to get the high resolution PDF-document]. Thanks to Yann Philippe Tastevin. Update: the architects have added a new link with colour pictures and English translation.

The ‘Sustainable Urban Dwelling Unit’ (SUDU) in Ethiopia demonstrates that it is possible to construct multi-story buildings using only soil and stone. By combining timbrel vaults and compressed earth blocks, there is no need for steel, reinforced concrete or even wood to support floors, ceilings and roofs. The SUDU could be a game-changer for African cities, where population grows fast and building materials are scarce.

In “Tiles as a substitute for steel“, we highlighted the medieval art of the medieval timbrel vault, which allowed for structures that today no architect would dare to build without steel reinforcements. The technique is cheap, fast, ecological and durable. Shortly after the article was published in 2008, the timbrel vault made a comeback with two rather spectacular buildings: Richard Hawkes’ Crossway Passive House in England, and Peter Rich’s Mapungubwe Interpretation Centre in South Africa.

The cardboard formwork technique described last week promises to bring even more dramatic architecture, but at least as interesting is the news that the catalan vault is now also applied to a much more modest form of housing: the Sustainable Urban Dwelling Unit (SUDU), a low-cost family dwelling built in Ethiopia.

The Sustainable Urban Dwelling Unit (SUDU).

Though less spectacular at first sight, it could form the proof that even megacities can be constructed without the use of steel, concrete or wood. The double-story building, which was completed in last summer, is entirely made from soil and presents an economical and ecological solution to many of Africa’s most urgent problems. The SUDU stands in Addis Ababa, Ethiopia, a country with a population of more than 80 million (growing at an average 7 percent per year). The building is a joint project of the Swiss Federal Institute of Technology (ETH Zurich) and the Ethiopian Institute of Architecture, Building Construction and City Development (EiABC).

The SUDU combines past technologies from different continents, resulting in a new approach to low-tech construction adapted to specific local conditions. In the Mediterranean region, where the timbrel vault originated, the tiles have traditionally been made from fired clay. In the SUDU, the construction technique is united with the African tradition of cement-stabilized, soil-pressed bricks, which use locally available soil. This technique is called compressed earth block (CEB) construction. The SUDU has been built largely following the same techniques used for the Mapungubwe Centre in South Africa.

Urban housing

The SUDU was designed to achieve both environmental and economic sustainability. Because Ethiopia has few material and financial resources, the design is aimed at eliminating the reliance on imported, expensive and energy-intensive building materials such as steel and concrete. More unusual is that the building also excludes the use of wood, for the simple reason that wood is equally scarce in the country. The entire structure is made from locally available construction materials – and in the case of Ethiopia, these are very few: soil and stone.

The Sustainable Urban Dwelling Unit (SUDU).

One of the most challenging present problems for Africa (and throughout the developing world) is the tremendous deficit in housing for the urban poor. In Ethiopia, this is reflected in the ubiquitous informal housing, comprising perhaps 80% of the built environment of its capital, Addis Ababa. The most common vernacular construction method – construction with Eucalyptus wood and mud – is an economically and environmentally sustainable method of construction, but the problem of such constructions is that they are limited to one story – putting a huge strain on available land.

Thus, this vernacular technology has been more recently replaced by large urban housing projects of reinforced concrete, heavily subsidized by the government. These massive edifices of concrete and steel neither offer a model for frugal, environmentally or economically sustainable construction, nor do they offer a low-cost alternative to housing because they are too expensive to construct. The result is that more and more people are forced to be living on the streets. Whether it is the United States or Ethiopia, governments seem to prefer homeless people over shanty-towns.

The Sustainable Urban Dwelling Unit (SUDU).

In poorer areas of Addis Ababa, dwellings are often constructed from corrugated metal. These dwellings cannot be expanded upon for multi-story construction, yet sprawl outward, consuming limited resources including wood, expensive imported materials, and land.

Urban density

The SUDU is an exploration of a “medium ground” between single story informal dwelling and massive scale urban density, as studies have shown that even two-story buildings dramatically impact urban density. As the example of Tokyo shows, a megacity can be largely based on double-story buildings. Because the other aim is to build using only locally available materials, and wood reserves are scarce, the goals of SUDU were to build two stories in soil – a significant challenge without the aid of steel, concrete or milled lumber. Multiple-story soil architecture has a long tradition in Africa, though none of it has been constructed without wooden beams.

Building multiple stories in soil is a significant challenge without the aid of steel, concrete or lumber

As soil and stone have limited tensile capacity, building with these materials demands compression-only structural solutions. For walls carrying dominantly vertical loads, this criterium is easily satisfied. However, once a space must be spanned, beam elements – which work in bending – are typically required. A beam, as a structural system, demands that its section can accomodate tension and compression forces, which is not possible when building in stone or soil only.

The Sustainable Urban Dwelling Unit (SUDU) under construction.

By adapting local soil knowledge to the production of soil stablized tiles, however, it is possible to introduce the technology of timbrel vaulting to allow floor and roof systems of pure compression in multiple story buildings. Ethiopia has a rich soil, which contains high levels of clay particles. Almost all excavated material in the city of Addis Ababa is a possible source for the material needed to build new structures. The SUDU uses rammed earth techniques to construct the first level of the building, with a 60 cm wide wall structure. The ceilings and floors and the building are done using a tiled vauling technique using sun-dried tiles (first floor) and loam (for the roof) made from the very same soil.

Contrary to most other vaulting techniques, the catalan vault does require little to no formwork, again bypassing the need for wood.

Model for low-cost housing

Apart from the ecological and financial benefits, the construction technique used in the SUDU offers additional advantages. By drawing upon traditional methods, it engenders pride and social cohesion within the local community. And by using only locally available materials, it provides local jobs, introduces new skills and stimulates self-sufficiency. Through the economic benefits, the SUDU may become a model low-cost housing unit for the urban poor in Africa. It is meant to be a showcase to convince decision makers, economists, urban planners and architects to rethink traditional building methods and find new ways to build a town or even a city.

The construction of the SUDU was led by Lara Davis, who published a blog where the building process is documented from A to Z. There is also a movie. The BLOCK Research Group of the Swiss Federal Institute of Technology (ETH Zurich) has a webpage that links to all the research papers on the construction method. A book was presented November 25. Also of interest is a special architectural 2010 issue of the ADTF Journal published by the African Technology Development Forum. Several articles deal specifically with timbrel vaulting building methods, and outline some of the remaining challenges:

• “Tile vaulted systems for low-cost construction in Africa“.
• “Design and Construction of the Mapungubwe National Park Interpretive Centre, South Africa“.

Previously:

• Tiles as a substitute for steel: the art of the timbrel vault
• Timbrel vaulting in South Africa by Peter Rich
• Timbrel vaulting using cardboard formwork
• Engineering for the ecological age: lessons from history
• Building with mud and steel frames
• Building with pumice
• How to build a reciprocal roof frame
• How to build an earthbag dome
• How to build a medieval city
• Birch bark sauna
• Innovation and tradition: the complete works of Hassan Fathy online
• Why older buildings are more sustainable
• The solar envelope: how to heat and cool cities without fossil fuels

“Kazakh architect and artist Saken Narynov created a superstructure able to host what we could call an adobe vertical city. In fact, the structure is used as a matrix that can be more or less densely filled with multifamily habitation units. The traditional earth based material thus hybrids with the steel structure in a very unusual and interesting way and the space resulting between the habitation units and the structure is beautifully occupied by mazes of staircases and elevated pathways.”

“The design recalls recent works by the Chilean architect Marcelo Cortes, who employs a steel meshwork onto which mud is sprayed, but on a far greater scale. Cortes has developed a “quincha metalica”, a form of traditional quincha construction (mud and straw packed between a bamboo or wood frame) that uses a steel frame work.”

Picture above: Saken Narynov

Picture above: Saken Narynov

Picture above: Saken Narynov

Picture above: Saken Narynov

Picture above: Marcelo Cortes

Picture above: Marcelo Cortes

 Picture above: Marcelo Cortes

Building a traditional quincha house.

Via Funambulist & Earth Architecture.

Related:

• Building with pumice
• How to build a reciprocal roof frame
• How to build an earthbag dome
• Covered bridges: how to build and rebuild them
• Wooden pipelines
• Architecture for the poor: Hassan Fathy online
• The Blackfoot Indians

Three wonderful collections from the Library of Congress, showing obsolete technologies.

1. The World’s Transportation Commission Photograph Collection contains nearly nine hundred images by American photographer William Henry Jackson. In addition to railroads, elephants, camels, horses, sleds and sleighs, sedan chairs, rickshaws, and other types of transportation, Jackson photographed city views, street and harbor scenes, landscapes, local inhabitants, and Commission members as they travelled through North Africa, Asia, Australia, and Oceania.

Below: Boatmen towing sailboat against the wind up the Pieho to Peking.

Workmen repairing railroad track:

A camel train on the desert:

Chinese gunboat:

2. The Photochrom Print Collection has almost 6,000 views of Europe and the Middle East and 500 views of North America.
Published primarily from the 1890s to 1910s, these prints were created
by the Photoglob Company in Zürich, Switzerland, and the Detroit
Publishing Company in Michigan. The richly colored images look like
photographs but are actually ink-based photolithographs, usually 6.5 x 9 inches. 

Below: the knights’ hall, Mont St Michel, France:

The beach, Scheveningen, Holland:

Street in the old town, I, Biskra, Algeria:

3. The Tissandier Collection contains approximately 975 items documenting the early history of aeronautics with
an emphasis on balloon flight in France and other European countries.
Subjects include general and technical images of balloons, airships,
and flying machines; portraits of famous balloonists; views of numerous
ascensions, accidents, and world’s fairs; cartoons featuring balloon
themes; pictorial and textual broadsides; and colorful ephemera and
poster advertisements. There are also several hundred illustrations
clipped from books and newspapers. The pictures, created by many
different artists, span the years 1773 to 1910, with the bulk dating
1780-1890.

Via trialsanderrors and Tecnología Obsoleta (who highlights New York pictures).

In 1935 Sir Charles Bressey was appointed by Hore-Belisha, Minister of Transport, to make a comprehensive and systematic survey of the roads of Greater London. It was clear that the infrastructure required radical improvement to keep up with the expansion of traffic and Belisha said that Bressey’s report “would stir the imagination of the whole country”.

The report was published three years later and laid out a reconstruction scheme for London based on a detailed 30-year plan for highway development. Bressey’s plan to deal with traffic involved tunnels, overhead roads, new arterial and circular highways and ‘parkways’ linking the city to the rest of the country. Before any of this could be implemented the plan was interrupted by war and aerial bombardment. Nevertheless, many of Bressey’s ideas would influence post-war reconstruction and subsequent schemes for the capital’s reorganisation.

Source (if you’re in a UK school or library, you can access a movie about it).

Via Ptak Science Books, where you can see more illustrations of the “traffic improvements” outlined in the “Bressey Report”. Check out this blog, by the way, there is much more to be found (about 900 posts on the history of ideas and technology, to be precise…). It is written and illustrated by John Ptak, an antiquarian science bookseller.

Related: Magic Motorways, a similar plan for US cities.

“Roadtown“, Edgar Chambless, 1910.

More here, here, here and here. Via Alpoma.

Quoted from (again): “Where the Wasteland Ends“, Theodore Roszak, 1972. (Amazon link).