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1 – 10 of 160Venkatesh Kodur, James Stein, Rustin Fike and Mahmood Tabbador
This paper aims to present an evaluation of comparative fire resistance on traditional and engineered wood joists used in the construction of floor systems in residential housing.
Abstract
Purpose
This paper aims to present an evaluation of comparative fire resistance on traditional and engineered wood joists used in the construction of floor systems in residential housing.
Design/methodology/approach
Fire resistance experiments were carried out on four types of wood joists, namely, traditional lumber, engineered I-joist, castellated I-joist and steel/wood hybrid joist, used in traditional and modern residential construction. The test variables included type of wood joist, support conditions and fire protection (insulation).
Findings
Results from these tests indicate that webs of engineered I-joists and castellated I-joists are highly susceptible to fire, and failure generally occurs through the burn-out of the web. In addition, engineered I-joists have much lower fire resistance than traditional solid joist lumber. The application of an intumescent coating on an engineered I-joist significantly enhances its fire resistance and yields a similar level of fire resistance as that of a traditional lumber joist.
Originality/value
The presented fire tests are unique and provide valuable insight (and information) to the behavior and response of four types of wood joists when subjected to gravity loading and fire conditions.
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Sofie Pelsmakers, Evy Vereecken, Miimu Airaksinen and Cliff C.A. Elwell
Millions of properties have suspended timber ground floors globally, with around ten million in the UK alone. However, it is unknown what the floor void conditions are, nor the…
Abstract
Purpose
Millions of properties have suspended timber ground floors globally, with around ten million in the UK alone. However, it is unknown what the floor void conditions are, nor the effect of insulating such floors. Upgrading floors changes the void conditions, which might increase or decrease moisture build-up and mould and fungal growth. The purpose of this paper is to provide a review of the current global evidence and present the results of in situ monitoring of 15 UK floor voids.
Design/methodology/approach
An extensive literature review on the moisture behaviour in both uninsulated and insulated suspended timber crawl spaces is supplemented with primary data of a monitoring campaign during different periods between 2012 and 2015. Air temperature and relative humidity sensors were placed in different floor void locations. Where possible, crawl spaces were visually inspected.
Findings
Comparison of void conditions to mould growth thresholds highlights that a large number of monitored floor voids might exceed the critical ranges for mould growth, leading to potential occupant health impacts if mould spores transfer into living spaces above. A direct comparison could not be made between insulated and uninsulated floors in the sample due to non-random sampling and because the insulated floors included historically damp floors. The study also highlighted that long-term monitoring over all seasons and high-resolution monitoring and inspection are required; conditions in one location are not representative of conditions in other locations.
Originality/value
This study presents the largest UK sample of monitored floors, evaluated using a review of current evidence and comparison with literature thresholds.
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One of the major issues present in this case is whether there is significant industry pressure to internationalize. Yip’s (1989) global strategy drivers are a helpful approach for…
Abstract
Theoretical basis
One of the major issues present in this case is whether there is significant industry pressure to internationalize. Yip’s (1989) global strategy drivers are a helpful approach for examining this issue. This case also applies two important marketing concepts – the product life cycle and diffusion of innovation theory – and how differences across international markets impact these concepts. Finally, there are significant cultural issues at play in this case as well. Theoretical models of national culture, such as Hofstede, Hall and others, can be used to examine cultural influences on an industry that is not often associated with culture.
Research methodology
The case is based upon a combination of secondary research and primary research. The lead researcher and a team of graduate students conducted interviews with Louisiana-Pacific Corporation (LP) executives in the USA and Chile in 2017.
Case overview/synopsis
This three-part case examines the internationalization of LP into South America. Case A begins in 1999 as LP attempts to decide whether to take its oriented strand board product international. The reader is asked to consider where LP should go in South America. Case B examines the factors LP used to decide to enter Chile and then outlines the key decisions that led to its impressive growth between 2000 and 2015. Case C begins in 2015 as LP now considers whether to expand its markets into Argentina or Colombia.
Complexity academic level
Given the complexity of issues raised in the case and the need to narrow these issues down to an implementable decision, this case is most appropriate later in the schedule of a graduate or executive-level business course in international business or international marketing.
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Marwa Dabaieh, Nargessadat Emami, Jukka Taneli Heinonen and Björn Marteinsson
Over the last eight years, the Middle East has experienced a series of high profile conflicts which have resulted in over 5.6 million Syrians forced to migrate to neighbouring…
Abstract
Purpose
Over the last eight years, the Middle East has experienced a series of high profile conflicts which have resulted in over 5.6 million Syrians forced to migrate to neighbouring countries within the MENA (Middle East and North Africa) region or to Europe. That have exerted huge pressure on hosting countries trying to accommodate refugees in decent shelters and in quick manner. Temporary shelters normally carry a high environmental burden due to their short lifespan, and the majority are fabricated from industrialised materials. This study assesses the carbon impact for a minus carbon experimental refugee house in Sweden using life cycle assessment (LCA) as tool. SimaPro and GaBi software were used for the calculations and the ReCiPe midpoint method for impact assessment. The results show that using local plant-based materials such as straw, reeds and wood, together with clay dug from close to the construction site, can drastically reduce the carbon footprint of temporary shelters and even attain a negative carbon impact of 226.2 kg CO2 eq/m2. Based on the results of the uncertainty importance analysis, the overall global warming potential impact without and with sequestration potential are mostly sensitive to the variability of the GWP impact of wood fibre insulation.
Design/methodology/approach
The methodology is designed to calculate the GWP impact of the refugee house over its entire life cycle (production, operation and maintenance and end of life). Then, the sensitivity analysis was performed to explore the impact of input uncertainties (selection of material from the database and the method) on the total GWP impact of the refugee house with and without sequestration. The ISO standards (International Standard 14040 2006; International Standard 14044 2006) divide the LCA framework into four steps of Goal and scope, inventory analysis, impact assessment, and interpretation.
Findings
This study has shown an example for proof of concept for a low impact refugee house prototype using straw, reeds, clay, lime and wood as the principle raw materials for building construction. Using natural materials, especially plant-based fibres, as the main construction materials, proved to achieve a minus carbon outcome over the life cycle of the building. The GWP of the shelter house without and with sequestration are found to be 254.7 kg CO2 eq/m2 and -226.2 kg CO2 eq/m2, respectively.
Originality/value
As there are still very few studies concerned with the environmental impact of temporary refugee housing, this study contributes to the pool of knowledge by introducing a complete LCA calculation for a physical house prototype as a proof of concept on how using low impact raw materials for construction combined with passive solutions for heating and cooling can reach a minus carbon outcome. The GWP of the shelter house without and with sequestration are found to be 254.7 kg CO2 eq/m2 and -226.2 kg CO2 eq/m2.
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Considers the development in construction of subfloors. Examines the various parts of the subfloor system. Discusses the need for and provision of subfloor ventilation. Shows that…
Abstract
Considers the development in construction of subfloors. Examines the various parts of the subfloor system. Discusses the need for and provision of subfloor ventilation. Shows that the main developments in subfloor ventilation have occurred in the last 30 years of the twentieth century. Highlights the dangers in overlooking the importance of subfloors to the performance of ground floors.
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Discusses the techniques of repair and conservation of earlylime‐based plasterwork. Considers the problems of cracks in plaster,detachment of plates of plaster, the breaking up of…
Abstract
Discusses the techniques of repair and conservation of early lime‐based plasterwork. Considers the problems of cracks in plaster, detachment of plates of plaster, the breaking up of plaster, and the stages in the repair of wall panels and overmantles and the re‐hanging of ceilings. Concludes that since old plaster cannot be reproduced, careful consideration procedures are necessary, although complete plasterwork is best left alone.
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Harry Nelson and Ilan Vertinsky
Disputes about Canadian exports of softwood lumber to the U.S. have persisted for more than a century. In this paper the roots of the disputes and the prospects for their…
Abstract
Disputes about Canadian exports of softwood lumber to the U.S. have persisted for more than a century. In this paper the roots of the disputes and the prospects for their resolution are examined. The focus is on the following key factors: (1) the nature of supply and demand; (2) the normative differences underlying the systems of timber management in the two countries and differences about what constitutes a “level playing field”; (3) rent seeking by stakeholders; and (4) weakness in bilateral and multilateral trade dispute resolution institutions. The paper concludes that there are good reasons to expect short term solution to the current dispute but persistence of the disputes in the long run.
Continues the investigation into the development of ground floors in residential buildings. Focuses on the constructional features of traditional ground floors, both solid and…
Abstract
Continues the investigation into the development of ground floors in residential buildings. Focuses on the constructional features of traditional ground floors, both solid and suspended. Describes the influences that constructional form had on the development of ground floors. Indicates that suspended timber ground floors became more common after the mid‐nineteenth century.
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Corrosion of aluminium bungalows erected between 1947 and 1951 and designed for a full life of 60 years has caused the Ministry of Housing and Local Government to issue a…
Abstract
Corrosion of aluminium bungalows erected between 1947 and 1951 and designed for a full life of 60 years has caused the Ministry of Housing and Local Government to issue a statement to local authorities on the dismantling of these bungalows. The circular, which contains results of examination of the bungalows, has led to questions being raised as to the suitability of aluminium for building purposes including dwellings. Since technical aspects of the circular with a bearing on corrosion are of great interest, extracts are published below, followed by explanations of the deterioration and a general answer to possible questions.
David R. Riley, Corinne E. Thatcher and Elizabeth A. Workman
This paper aims to disseminate an innovative approach to sustainability education in construction‐related fields in which teaching, research, and service are integrated to provide…
Abstract
Purpose
This paper aims to disseminate an innovative approach to sustainability education in construction‐related fields in which teaching, research, and service are integrated to provide a unique learning experience for undergraduate students, faculty members, and community partners.
Design/methodology/approach
The paper identifies the need for sustainability education in fields related to construction and describes an interdisciplinary course at Penn State that addresses this need. The goals, research, and applications of the course are detailed, as is the sustainable construction technology employed in course projects. Finally, the results from two course assessments are summarized to support the authors' hypothesis that knowledge best occurs and develops in an arena of negotiation, collaboration, and creation.
Findings
Students who participate in the course experience well‐rounded growth that includes, but is not limited to, increased research, design, communication, and collaboration skills, a finding that underscores the effectiveness of the course's holistic approach to engineering and architecture education.
Practical implications
The paper demonstrates that engaged approaches to architecture and engineering education contribute to a heightened awareness among students of the importance of sustainability. It encourages other educators to adopt similar approaches to sustainability education in their courses.
Originality/value
The paper addresses the need for sustainability education in construction‐related disciplines by detailing an innovative course developed at Penn State to raise environmental and social awareness among architecture and engineering students. The engaged approach utilized in the course is replicable in any discipline and promises to have a significant impact on the commitment of today's students to creating a tomorrow in which sustainability is the norm rather than an anomaly.
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