Acta Structilia 2020-06-30T08:50:17+02:00 Prof. Kahilu Kajimo-Shakantu Open Journal Systems <!-- Global site tag (gtag.js) - Google Analytics --> <p><em>Acta Structilia</em> is a South African accredited journal and publishes peer reviewed articles on any topic in the field of the physical and development sciences (i.e. architecture, quantity surveying, construction management, project management, building economy, engineering and property development).&nbsp;</p> Architectures of informality edited by Ivan Kucina 2020-06-29T16:48:40+02:00 Ar.Sayed Ahmed <p>The book, written by students from the Dessau International Architecture Graduate School, is a compilation of five contextual topics regarding informal architecture. This book might lack scholarship of academic expertise, as confessed by Prof. Ivan Kucina, but it offers interesting reading for those with a passion for new and unconventional architectural ideas.</p> 2020-06-29T00:00:00+02:00 Copyright (c) 2020 Utilisation of forecasting technology for improving construction logistics in Nigeria 2020-06-29T15:50:47+02:00 Yahaya Isah Winston Shakantu Saidu Ibrahim <p>The need to investigate new technology for forecasting purposes in construction logistics is due to the fact that the forecasting ability (modern technology utilisation) of the Nigerian construction sector, in terms of logistics management, is relatively low when compared to manufacturing and retailing industries. This is affecting the performance of the construction sector. Moreover, the current logistics technologies used for forecasting operations in the Nigerian construction industry are relatively inefficient and insufficiently investigated to inspire new logistics technologies for the construction industry. Hence, this article investigated how forecasting logistics technologies could be utilised in manufacturing and retailing industries, in order to improve the forecasting processes of construction logistics. Lagos State and Abuja, the Federal Capital Territory of Nigeria, formed the selected geographical scope of the study, from which five manufacturing; five retailing companies, and five construction projects were purposely selected. A mixed methods research strategy were used. The research instruments included an observation guide (quantitative) and semi-structured interviews (qualitative). The collected quantitative data were analysed, using descriptive analytical tools: frequencies and percentiles. The qualitative data was analysed, using the thematic method. The results revealed that all the observed manufacturing industries (100%) adopted the Enterprise Resource Planning (ERP) technology for forecasting purposes in the following areas: material, demand, product, and production forecast. Of the observed companies in the manu-facturing and retailing industries, 80% and 40%, respectively, adopted the Material Requirement Planning (MRP) technology for forecasting purposes. Only 20% (one project) of the observed construction projects adopted the MRP technology for fore-casting in the following: 5% for demand forecast (demand control); 6.7% for material forecast (stock control), and 20% for product forecast (product output). It was also revealed that utilisation of the forecasting technology in construction could have the following benefits: proper resource planning; improved production scheduling; reduction in inventory; effective treatment of scheduling problems, and efficiency of the supply-chain system. Results showed that effective tilisation of forecasting technology in the logistics system of the construction industry could lead to full efficiency gains in forecasting logistics of the construction industry. It is recommended that the Nigerian construction industry should leverage on this, in order to create the best ways of handling the forecasting technology to improve the forecasting logistics systems of the construction process.</p> 2020-06-29T00:00:00+02:00 Copyright (c) 2020 The impact of the integrated residential development programme on surrounding property values: Case study of Fleurhof, Johannesburg 2020-06-29T16:06:02+02:00 Nontokozo Mnisi Aly Karam <p>South Africa is challenged with an increased backlog of adequate subsidised affordable housing for the marginalised in well-located areas that provide access to urban amenities and places of employment. However, the perception of subsidised affordable housing developments built in the urban core in close proximity to bonded properties is significantly negative. This article seeks to address whether the presence of subsidised affordable housing provided through South Africa’s Integrated Residential Develop-ment Programme (IRDP) impacts on the property value of bonded properties located nearby. This article examines the impact of the subsidised affordable housing development of Fleurhof, Johannesburg, on surrounding property values. It investigates, in particular, whether the IRDP housing development decreases property values. Using hedonic pricing models (HPM) with regressions, the housing attributes (characteristics) and property price data, dating from 2001 to 2017, were used to determine the effect on the value of properties in the suburbs of Meadowlands East Zone 1 and Orlando West in Soweto and Florida in Roodepoort, as the two closest residential communities to Fleurhof. The article reveals that the close proximity of the housing development in the initial stages (2001-2010) of the development affected property values negatively. However, in the long run, the housing development does not affect property values.</p> 2020-06-30T00:00:00+02:00 Copyright (c) 2020 Risk assessment for hazard exposure and its consequences on housing construction sites in Lagos, Nigeria 2020-06-29T16:18:53+02:00 Oluwasinaayomi Faith Kasim Adekunle Moruf Alabi Sunday Wusu <p>Despite housing construction’s economic contribution, the nature of work done is well acknowledged as risky to execute because of the occupational accidents and work-related hazards to which workers are exposed. Most of the workers experience hazards, owing largely to inadequate or lack of safety infrastructure and mechanisms for protective gear. This article examines varying levels of hazards to which workers are exposed at housing construction sites in Lagos, Nigeria. A mixed methods research was used to collect the necessary data for the study. From the total number of 511 residential building construction sites identified, simple random sampling technique was used to select 255 (50%) of the buildings. A questionnaire was administered to the supervisors on each site to obtain information on the exposure of hazards on housing construction sites. In addition, one month’s data on incidents of near miss, accident and fatal cases were obtained from construction managers/supervisors for each site. The data was analysed with frequencies, percentages and inferential statistics. Construction workers are exposed to multifaceted hazards. Roughly 91% of the respondents had witnessed hazards of varying degrees. Paired t-test values showed that, on average, 25.3 more near misses and 12.4 more accidents happened monthly on sites supervised by individuals/owners than on sites supervised by trained supervisors. The Pearson’s r test (r = -0.705) showed that not enough first-aid kits were provided on sites to meet the needs of workers. Proper safety mechanisms to ensure strict adherence to safety rules and regulations at construction sites must be developed and enforced.&nbsp;</p> 2020-06-29T00:00:00+02:00 Copyright (c) 2020 Isivivane, Freedom Park: A critical analysis of the relationship between commemoration, meaning and landscape design in post-apartheid South Africa 2020-06-29T16:28:57+02:00 Graham Young Piet Vosloo <p>At the dawn of democracy in 1994, the nation was seeking a new identity and for many South Africans it was to be an identity based on their African culture and tradition. Politicians were seeking ways to commemorate those who had lost their lives in conflicts leading up to the first democratic elections when the African National Congress (ANC) came into power. In attempting to achieve this, the Department of Arts and Culture initiated several legacy and heritage projects, including the Isivivane, a memorial place at Freedom Park in the City of Tshwane. This article determines the effectiveness of landscape design in communicating the intent and meaning of commemorative places in a multicultural postapartheid society. In this article, the Isivivane is presented as a case study and the research survey has been used to gauge the visitors’ experience and perception of the Isivivane. Based on the results of a quantitative questionnaire, underpinned by theories rooted in phenomenological interpretation and landscape narrative, the article confirms that peoples’ experience and perception of the Isivivane are influenced by its design and that its landscape features are significant in evoking a response that enabled visitors to identify with the place and assign individual and collective meaning to it. The argument is supported by current theories of commemoration and meaning derived through landscape design. The implications of the study are useful and can potentially open doors for further studies that delve deeper into an understanding of the contribution that landscape design makes in the conceptualisation of commemorative places in a pluralistic and politically charged South Africa.</p> 2020-06-29T00:00:00+02:00 Copyright (c) 2020 An assessment of the causes of schedule and cost overruns in South African megaprojects: A case of the critical energy sector projects of Medupi and Kusile 2020-06-29T16:35:56+02:00 Fhumulani Tshidavhu Nthatisi Khatleli <p>Cost and schedule overruns are the most common challenges in mega construction projects around the globe, and South Africa is no different. Although comparatively small in number, megaprojects have an inordinate number of projects failing, due to budget overflow and schedule slippage. This article assessed the causes of cost and schedule overruns as well as the challenges with the implementation of critical construction mega-projects, using Kusile and Medupi energy-sector megaprojects in South Africa. Using a quantitative research method, which included a literature review and a questionnaire survey, identified the causes of schedule and cost overruns as well as the challenges militating against the project’s implementation success. Data was collected from engineers, quantity surveyors, architects, contractors, and project managers who were randomly selected from the two mega-projects, Medupi and Kusile. Data was analysed using mean score ratings and ranking. The results revealed that slow client decision-making, shortages of skilled labour, inaccurate material estimating, unforeseen ground conditions, poor material planning, changes in scope of work on-site, contractual claims, variation orders and poor site management were the major causes of schedule and cost overruns. Findings show that the top five challenges (poor site manage-ment, inadequate managerial skills, poor monitoring and control, unstable manage-ment structure, and lack of experience together with poor organisation structures) is all management and organisational related, showing that there is not enough local manage-ment and organisational expertise in South Africa to ensure the proper planning and effective implementation of energy megaprojects. This article is relevant, as it contributes to the understanding of key challenges faced by mega-projects in the context of a developing country. Specific solutions that mitigate the causes of schedule and cost overruns should be investigated in future studies. </p> 2020-06-30T00:00:00+02:00 Copyright (c) 2020 Early sustainable architecture in hanging skyscrapers – A comparison of two financial office buildings 2020-06-29T16:42:59+02:00 Christo Vosloo <p>Reuse, or the ability to continue using an item or building beyond the initial function, is a key concept in the literature on sustainability. This implies that a building should be designed in a way that will allow it to be repurposed when changing circumstances require changes in its layout or function; being energy efficient and environmentally sensitive is not enough. The building also needs to be financially viable and the people whose lives are impacted by it should wish to have it retained. As far as flexibility of high-rise or skyscraper buildings is concerned, the structural system and layout are some, but not the only aspects that are of particular importance in this regard. Upside-down or ‘hanging’ buildings, because of the reduced use of columns, can potentially provide advantages when viewed from such a widened understanding of sustainability. Two such buildings are the Hong Kong and Shanghai Bank (HSBC) headquarters building in Hong Kong and the Standard Bank Centre (SBC) in Johannes-burg. The SBC stands virtually unused and in disrepair, while the HSBC remains fully operational and revered by the population of Hong Kong. This article compares the design and construction processes of the two buildings to determine why these two buildings ended up in such divergent situations. The aim is to make recommendations regarding structural systems and other factors that could assist in ensuring that future skyscrapers will be more sustainable, in addition to being energy and resource conserving. Furthermore, this comparison sheds some light on the historical development of the understanding of sustainability and the difference between green design and sustainable design.</p> 2020-06-29T00:00:00+02:00 Copyright (c) 2020