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This paper re-visits the basic premises of open building: designing for change as well as for stability, including the users in the design decision-making processes, and disentangling the building systems into the levels and allowing replacement; then, addresses the limitations of conventional design media in terms of the capabilities to support these aims. It is discussed that the design media should be predictive, dynamic, and interactive. Virtual prototyping as an enabling technology is reviewed and proposals are made for the future use of this technology for open building design.

Open Building and IFD (Industrial Flexible Demountable) building are philosophies that aim to create high quality buildings with increased flexibility and better environmental characteristics. However, a successful adoption of IFD principles has not yet occurred because of concerns for the types of connections that are needed between building components. Therefore, this paper describes PhD research at the University of Twente that has the objective of designing a typology of flexible interfaces for IFD building that can be widely applied in the construction industry and aims to standardize connections, at the various levels of technical composition of a building, to create compatibility between building products from different suppliers. Such a typology of interfaces will increase the re-use and recycling of building parts, resulting in the increased sustainability of the building process. Furthermore, it will help accelerate the industrialization of the housing industry and mass customization of housing. A preliminary case study, in which a sustainable, flexible bathroom is designed, illustrates the various types of interfaces that can be applied, based on existing research. The paper illustrates the importance of interfaces, and aims to increase environmental benefits of buildings (less construction waste), improve the social aspects (higher user satisfaction in buildings) and achieve economical advantages (lower overall costs) by designing new interfaces.

This paper addresses opportunities available for meeting sustainability objectives in building construction by using the conceptual alignments of Open Building and LEED^™ Rating. These two systems utilize hierarchical, scalar categorizations to structure issues of design as a set of nested constructs and function as methodologies for affecting both problem definition and the management of strategic design process.

Each system addresses the distribution of control in the design decision−making process as a positioning of decisions in space and time. Establishing the correlation of the two systems can facilitate the conversation among all participants involved in the origination, construction, use, and management of buildings−and their systems−as they seek to assure the sustainability of what they design, build, and use.

Teaching students of architecture an open building way of designing in a studio setting can be fruitful. To be even more fruitful, however, “warming - up” exercises are useful, but take time to do properly and are not an easy fit in the studio setting. This paper offers some examples of both open building studio projects and “warming-up” exercises given in the studio setting. It also offers comments on lessons learned over the years in teaching in such a way in architectural studios and argues for the development of courses specifically focused on “warming-up” design exercises, not only in support of open building but more generally. These may be most helpful if offered outside but supportive of the design studio. But such opportunities are rare, because “design skill” courses do not exist in architectural curricula.

Baumschlager & Eberle's design works can be characterized as typological, regional, tectonic and highly crafted, using both modern and traditional technology. Their work provides a reference for study, the findings of which may bridge the gap between Open Building research and theory on one hand, and the skillful architectural practice on the other. This paper analyzes their conceptual and methodological approaches. It concludes that the quality of architectural work relies on the interpretation of the particular social, cultural and technological conditions of the specific place in which a building is situated. They generated an open plan typology and operable façade systems to deal with changing needs of the users and even any uncertainty in the design and construction process. They conceptually and technically divided a building into five separate systems according to different life spans of materials, to accommodate a diversity and change of needs, and at same time maintain the long lasting and sustainable structure including the façade. The buildings they designed are the product of their unique design management, which aimed at motivating all the people involved in the building process, without undermining the role of the architectural profession.

Traditional Iranian houses, were built of heavy, voluminous building materials resulting in massive bearing wall structures. Such buildings had fixed architectural spaces, with defined boundaries and dimensions. However, the need for adaptability was fulfilled through creating multifunctional spaces, seasonal or even daily movements in the horizontal and vertical directions of house areas, and subdivision or expansion of the primary spaces. Urbanization in Iran is leading to gradual replacement of individual houses by residential complexes and apartments in which, the use of traditional design principles was lost, while solutions to enhance adaptability in the internal layouts have not yet developed.

The paper concludes that open building may provide practical tools to enhance spatial variations in the new conditions. However, to take the first step towards this approach in Iran, some major issues such as "legal framework", "changing needs of Iranian families", "Iranian life styles" and "situation of industrial building production in Iran" have to be analyzed. Considering the mentioned factors, some recommendations for architectural design are proposed.

Each person in Hong Kong produces three times more waste than that of Singapore. This is because a large portion of the waste in Hong Kong is from the construction sector. Re-decoration work carried out by dwellers in Hong Kong is one of the major sources of the construction and demolition waste. Development of flexible reusable infill systems with high recycling potential is significant. A number of these systems are currently used, mainly in public and commercial buildings. They may have potential to be applied in residential buildings in the future.

This paper starts with an introduction to the infill systems applied in open building history. It then points out the need to investigate the development of infill processes by integrating infill products available in the market. The paper further introduces current open building studies on reusability of infill systems and addresses the problem that there is a lack of quantitative information on embodied energy and other environmental impacts of infill systems.

In the methodology section the paper describes five types of partition walls selected, ranging from low flexibility to high flexibility. Applying an evaluation model for environmental impact, the paper analyzes embodied energy intensity, and environmental impacts of each partition systems in two simulated situations. One is in a two room unit of a public housing prototype and the other is in private apartment. It concludes that partition walls with higher flexibility are highly intensive in their embodied energy. In other environmental impacts, especially recycling potential, flexible partition wall panels exceed that of conventional block-work partitions. The study will enable more complete information to be obtained concerning the environmental impact of infill components and will assist architects and other building professional wisely apply open building design concepts.

Designing learning environments is increasingly about mediating between the interactions in real and virtual space of largely self-organising learning communities. Traditional ways of briefing designers are less and less proficient, as the demands made on space become less timetabled, more probabilistic. ‘learning landscapes’ ¹ are proposed in which clusters of activity can be seen to be taking place across a field, that activity can be browsed, audited and fully engaged with. Such organic flows of interest and concentration are hindered by traditional demarcated space models, and attempts to enable the flows through ‘flexible’ interlinking of rooms fail.

There is evidence ² that the organic interactions between learners grow exponentially when these learners are connected together as virtual communities in open, robust virtual platforms. But this works best when these interactions are grounded from time to time in real places. How can designers best provide spaces that support learning in real and virtual space? Should design teams be composed of people with skills in devising real and virtual space?

Increasingly the answer is ‘yes’, and this places strains on procurement processes. Built form can take a long time to deliver. So can virtual platforms take time to devise and make operable. Can these processes be aligned? The concepts for RMIT’s Design Hub, a physical design research platform, were developed through research conducted twelve years before the building was completed. Many of the gap years were taken up with establishing the financial basis for constructing the Hub. During this time the concepts were validated by testing with various potential user groups, and a further tranche of international investigations validated the level of innovation being sought. The process for RMIT’s Swanston Academic Building (SAB) was smoother and shorter, but it involved a year in which a ‘learning landscape’ concept was moulded through intensive work with user client focus groups.

Neither of these projects has a virtual doppelganger, though both have sophisticated and evolvable IT systems. The Hub embeds a process of curating research interaction and dissemination that is hampered by this fact. The mediated learning landscape of the SAB falls short of the originating concepts, – because space constraints did not allow for an undivided, flowing landscape. A well designed virtual counterpart could have provided what the insertion of walls has obscured. Should all future innovative learning and researching environments have a virtual counterpart from the outset?

There is an emerging trend for such paired environments in creative city thinking and in museums. Surely briefing and procuring real and virtual environments in tandem will enliven future space use in universities?

The effects of dust exposure in buildings and its health and comfort consequences continue to concern occupants, particularly those who spend most of their time indoors. This study examines the influence of building opening characteristics on surface dust loading in indoor environments to determine the dust particles' impact on different opening configurations.

Indoor Harmattan dust surface loading data were collected from Maiduguri, Northeastern Nigeria, using model rooms with six different window configurations. A simple mathematical relationship was employed to assess surface dust loading characteristics in the model rooms. The study measured dust thrice between December and February for three days (72 h). The results were analyzed using descriptive statistics.

The results determined the highest average surface dust loading of 12.03 g/m2 in the room with awning windows at an indoor-to-outdoor (I/O) ratio of 0.7. In contrast, the experiment in the room with a closed window recorded the lowest average surface dust loading of 5.24 g/m2 at an I/O ratio of 0.30, which is infiltration. The outcomes further indicate that the average surface dust loading varies with the building opening type and position, as higher surface dust loadings were recorded in locations closer to the openings (doors and windows), reaffirming that the dominant source of the dust particles is outdoors. According to the study, dust incursion due to infiltration accounts for 30% of the outdoor surface loading.

Thus, Harmattan dust is a serious challenge to the health, productivity and hygiene of building occupants in the study area. The built-environment professionals must use the study's outcome to optimize building openings' designs (shape, size and form) for effective indoor dust control.