Typological problems of housing in Vienna and Frankfurt

The purpose of this paper is to consider a number of valuable architectural accomplishments from the beginning of the XX century, built in Vienna (1919-1933) and Frankfurt am Main (1925-1931), by means of Aldo Rossi’s theoretical thought and analytical approach. Through the author’s re-drawings of selected case studies, it is possible to analyse the relevance of housing in the construction of the city and the fundamental role of the typology and morphology. Of the European experiences Das rote Wien and Das neue Frankfurt developed the most convincing typological solutions in answer to issues raised by housing problems in the nineteenth century. They correspond to two opposite urban and typological models: the large courtyard block (Hof) and the slab formation block (Siedlung). In this regard, Aldo Rossi provided a thorough examination concerning housing typology showing a particular interest in Vienna and Frankfurt examples: for instance, the article Un piano per Vienna published in Casabella Continuità 277 (1963); some essays on typological features in Aspetti e problemi della tipologia edilizia (1964); The Architecture of the City (1966); and Neues Bauen in Deutschland (1973), edited when he was professor at the ETH Zurich. He also investigated the 1920s housing examples through the relationship between “socialist realism” and “architectural rationalism”. The main purpose of this contribution is to propose a comparative analysis between the housing projects built in Vienna and Frankfurt that present inspiring and relevant qualities concerning morphology, density and typology. The study is conducted through critical re-drawings of the Höfe and Siedlungen typological assemblage plans by employing the same graphic code in order to get the highest degree of homogeneity and comparability. On the one hand, the purpose is to produce new and original analytical documents – in line with Rossi’s attitude about the project knowledge as necessary instrument –, on the other hand, to demonstrate that these dwelling complexes, even though they were designed almost one hundred years ago, are a fundamental presence within the contemporary city and offer key insights relevant to today’s housing design. The significant teaching of the Vienna and Frankfurt housing initiatives consists in their critical attitude to building the city through typological research, that they posit as an essential element for the society. Architectural historians and critics have often neglected or looked at these examples from a mere ideological perspective. Thanks to Rossi’s contribution about the observation of the city assumed as “urban artifact”, today, it is possible to investigate these typological solutions using a new approach which intends to better comprehend 1920s’ social housing experiments and, thus, provide a wider understanding. To sum up, the comparative approach has two goals: on the one hand, it establishes a homogeneous instrument that could efficiently be applied to several other housing cases in order to increase the studies and the research concerning this topic; on the other hand, it stresses the importance of morphological and typological research within the contemporary housing debate and architectural design.

Typological Problems of Housing in Vienna and Frankfurt

Alessandro Porotto

Il Poligrafo2020

Kleinwohnung vs Existenzminimum. Social housing types from inter-war years

Alessandro Porotto

The interwar period was particularly crucial for urban policies in Europe because it was characterized by an intense architectural and programmatic debate concerning the form of the city and the production of social housing. Of the European experiences Das rote Wien (Vienna, 1919-1934) and Das neue Frankfurt (Frankfurt am Main, 1925-1933) developed the most convincing typological solutions in answer to issues raised by housing problems in the nineteenth century. In this perspective, the Viennese Kleinwohnung (small flat) and the Frankfurt Existenzminimum (minimum dwelling) correspond to two alternative, but complementary, dwelling types. The objective of this paper is to draw a comparison of these opposite architectural types according to the following criteria: dimensions, distribution, and spatial composition. Despite their evident differences, both are the result of a modern and rational approach for designing the affordable housing as well as for promoting a new living culture (Wohnkultur). The main concern is the achieved comfort: for example, by adding the entrance hall, the equipped kitchen, the toilets, and an efficient organization of rooms. They constitute an improvement of the hygienic conditions, but also the accomplishment of a democratization program, which means to eliminate the distinction between social classes. The analysis is realized using critical re-drawings of the houses plans in order to get the highest graphic homogeneity. Therefore, the aim of this study is the critical comparison of a selection of case studies from an architectural point of view. Architectural historians and critics have often neglected or observed in an ideological perspective these examples. Today, looking at those the typological solutions means a new approach for a better comprehension and a wider viewpoint of 1920s’ social housing experiences. The comparative approach that animates this paper allows the analysis of several case studies through homogeneous tools. The systematic use of redrawing stress the key role of some architectural solutions, which are still today in the centre of housing debate.

2017

Densité et logement collectif

Nicolas Bassand

As a measurement, built density (coefficient of land surface to be built and total floor space) has been the object of numerous researches on urban morphology and architectural forms during the twentieth century. However, for the last ten years, its sensory and qualitative dimension seems to be particularly valued: the perceived density. In multi-unit housing, dense, innovating and compact forms show a significant change of architectural and urban conception. In fact, project practices seem to have been marked by three major changes. Firstly, the importance of the precept of sustainable development, attempting at reducing urban sprawl. Secondly, the increased interest in urban values and the idea of "building a city within a city". Lastly, the current asserted need to redefine density: on one hand, new means are being researched to control it, on the other hand there is a widening of its definition due to the main impulse of architects and researchers. Within this framework, it is illuminating to reconsider the multiple disciplines using this term, as well as the distinct spatial scales tackled in this notion and changes in its use through time. However, focusing only on built density, the present research concentrates on the architectural and urban framework, also known as physical density. It is measured by a density figure but is also qualified by the perception of density. We propose as preliminary approach, an examination of this perceived density in fields where it is more frequently used, such as literature, painting and music. Another important notion of this research requires definition: architectural and urban innovation. Standing out from pure invention, this type of innovation consists essentially in a reinterpretation of previous architectural and urban productions worth naming "retro-innovation". Despite a housing program dependent on past models reluctant to rapid and important changes, radical innovations do occur, though more seldomly. Several ''moments'' of the collective housing architectural history allow for an updating of the different stakes manifested in the density – innovation relationship. Density perception plays a large role in a particular problem emerging from these two notions in contemporary Switzerland. The issue is how encouraging people coming back to the urban centers by proposing larger apartments with more square meters and urban architecture composed of numerous and various spaces, but protecting them at the same time from too close a proximity between neighboring housing and from environmental nuisances. The state of the art brings to light the enormous influence of the researcher and anthropologist Amos Rapoport on perceived density starting with his article, "Towards a Redefinition of Density", published in 1975. For more than thirty years now, architects, psychologists, city planners and geographers refer to this work when defining this notion in their respective fields. As a consequence, it nourishes several reflections in this research. Following these various observations, we propose the analysis of fourteen contemporary multi-unit buildings. They represent the current urban stakes at play and show the architectural and urban conception facing the double requirement of density: to insure a high enough floor area ratio (measured density) and to qualify the housing density (perceived density). In parallel, this research determines if this conception, unique to dense multi-unit housing, tends to modify architectural practice. In the first phase, we examine seven rectangular housing units, in which the width of the building is significant, and seven courtyard buildings in order to examine the exterior spaces contained by the building's volumes. In the second phase, we focus our attention on the wall expression of the fourteen buildings. In this way, these distinct analyses offer three new definitions of the perceived density expressing conception aspects particularly significant for understanding the architecture and urbanity of these dense multi-unit buildings. As a fundamental knowledge, it is shown that density, within the corpus, orientates the architects project's mode. The frequent reinterpretation of paradigmatic dense lodgings is one of the most striking proof of this conceptual change searching for innovations in the register of collective housing. So, in the density of depth, introversion and anonymity on the exterior seems to encourage distinct individualized space within the building as common domestic spheres only opened towards the inside of the apartment. In several cases, the usual urban and public spaces are integrated into the private interior of the apartments as if to domesticate a certain urbanity. In the density of the void, the proposed introversion of semi-public courtyards seems to help maintaining a larger sense of community in these multi-unit buildings. Altogether, it demonstrates a particular capacity to produce small cities within the city, at the same time independent and linked to the city. Finally, through the analysis of wall density, the exterior materiality and expression, dynamic or static, monumental at times, present a decidedly urban architecture enhancing a compact city in quest of new inhabitants.

EPFL2009

Typological Problems of Housing in Vienna and Frankfurt

Alessandro Porotto

Il Poligrafo2020

Kleinwohnung vs Existenzminimum. Social housing types from inter-war years

Alessandro Porotto

2017

Densité et logement collectif

Nicolas Bassand

EPFL2009