No abstract

Hong Kong's construction industry has shown significant improvement in safety performance since the turn of the century. The number of industrial accidents in the construction industry has decreased from 11,925 in 2000 to 3,833 in 2004, which is an encouraging drop of almost 68%. However, the category "fall of person from height" has always represented a large proportion of the industrial accidents, particularly fatal accidents. In 2004, fall of person from height represented just over 47% of the total number of fatal accidents in the construction industry. The statistics show that although the overall number of accidents has dropped immensely, the same does not apply for fall from height accidents. According to statistics provided by the Labor Dept. of the Hong Kong Special Administrative Region, there were a total of 22 fatal industrial accidents associated with fall of persons from height in repair, maintenance, alteration, and addition works during 2000-2004. When analyzing these case studies, 12 common factors were identified for analyzing these case studies and strategies were suggested to prevent recurrence of similar accidents in each case. The top five strategies were: ͑1͒ provide and maintain a safe system of work; ͑2͒ provide a suitable working platform; ͑3͒ ͑tier͒ provide safety information/training/instruction/supervision; ͑4͒ ͑tier͒ provide suitable fall arresting system/anchorage; and ͑5͒ maintain safe workplace.

Although the buildability of building designs has not been commonly taken as an important parameter in design quality assessment, previous studies have linked buildability to time, cost, quality and safety performance in many ways. Based on this observation, the question arises of how buildability can be benchmarked and which aspects of project performance can be improved. After identifying available benchmarking tools, the relative correlations are investigated between different buildability attributes and construction performance in terms of time, cost, quality and safety. Based on a questionnaire survey, it was found that construction time performance has strong positive correlations with buildability in the design of external wall elements, simplicity of assembly and installation considerations, while other design attributes affect cost, quality and safety performance to varying degrees. With this understanding, it is postulated that best practice can be promoted among design teams for enhancing buildability, which would in turn raise project performance. Three experienced practitioners have been interviewed for verifying the practicality of buildability benchmarking. As an incentive to improve buildability, benchmarking would help construction stakeholders reap their desired benefits by focusing on the related design attributes in the pre-construction stage, particularly for functionally oriented buildings.Buildability, project performance, benchmarking, best practice,

PurposeBuilding information modelling (BIM) is a paradigm shift in the architectural, engineering and construction industries which transforms processes to achieve greater efficiency and effectiveness. The purpose of this paper is to highlight the implementation of BIM in Hong Kong and the USA and recommend strategies for BIM implementation in Hong Kong.Design/methodology/approachA literature review of BIM initiatives taken in Hong Kong and the USA was conducted including the government policy, guidelines, standards and implementation status. Findings from the literature review were complemented with insights obtained through focused interviews of experts in the field for arriving at recommendations based on the research. The principal investigator of this research also participated in the establishment of a BIM professional institute as one of the founding board members.FindingsAs a result of studies performed for this paper, guidelines are proposed for BIM implementation in Hong Kong. The role of government in implementing BIM in different phases of a project lifecycle is also highlighted.Research limitations/implicationsThe research is limited mainly to the initiatives of BIM taken by the public sector (government). The roles of other stakeholders are not specifically studied. Results from this study should be considered in the context of a qualitative research methodology adopted and the limited number of responses obtained for arriving at the findings of this paper.Practical implicationsResults from this study can be used as guidelines for the implementation of BIM elsewhere and this implementation can be compared with other countries.Originality/valueThis paper highlights the best practices of BIM implementation, which is useful for the effective and efficient implementation of BIM in Hong Kong.

No abstract

The purpose of this study was to develop anti-heat stress clothing for construction workers in hot and humid weather. Following DeJonge's functional clothing design process, the design situation was explored, including clothing fabric heat/moisture transporting properties and UV protection and the aspects of clothing ergonomic design (mobility, convenience, and safety). The problem structure was derived from the results of the surveys in three local construction sites, which agreed well with the task requirements and observations. Specifications were consequently described and 30 commercially available fabrics were identified and tested. Fabric testing data and design considerations were inputted in S-smart system to predict the thermal functional performance of the clothing. A new uniform prototype was developed and evaluated. The results of all measurements suggest that the new uniform which incorporated fabrics with superior heat/moisture transporting properties and loose-fitting design could reduce the workers' heat stress and improve their comfort and work performance. Practitioner Summary: The construction workers' uniform currently used in Hong Kong during summer was unsatisfactory. Following DeJonge's functional clothing design process, an anti-heat stress uniform was developed by testing 30 fabrics and predicting clothing thermal functional performance using S-smart system. The new uniform could reduce the workers' heat stress and improve their comfort and work performance.

Serum copper and caeruloplasmin concentrations are elevated in various carcinomas, but it is not known whether the rise in serum copper is due to elevation of caeruloplasmin alone or whether it is also due to the elevation of ‘free’ copper. We therefore determined ultrafiltrable copper to answer this question. Serum ultrafiltrate was prepared using the Amicon micropartition system and ultrafiltrable (free) copper was determined by flameless atomic absorption spectrophotometry. Serum total copper was determined by flame atomic absorption spectrometry and caeruloplasmin by rate nephelometry. There was no significant difference in the ultrafiltrable copper concentration between patients with gynaecological tumours and control subjects. However, total copper and caeruloplasmin concentrations were significantly elevated in cancer patients compared with control subjects. In contrast to total copper and caeruloplasmin concentrations, ultrafiltrable copper concentrations showed no significant increase with increase in the stage of the cancer.

Purpose -This paper is aimed at identifying the common approaches for improving constructability and evaluating their effectiveness of implementation. Design/methodology/approach -A comprehensive survey has been carried out on contemporary literature, i.e. from 1990 onwards, to trace the development of the buildability and constructability concepts and the common approaches of improvement. Findings -Results show that buildability is mainly concerned with design, quality of built products, ease of construction, as well as efficient and economical construction. Constructability emphasises integration of construction knowledge and experience at various project stages; optimisation of different project requirements to achieve overall goals; and ease of construction. Therefore, "constructability" embraces the concept of "buildability". The implementation of Quantified Assessment, Constructability Review and Constructability Programmes are the three commonly adopted approaches. Practical implications -Improvement measures should be implemented at the design stage, whereas improved constructability would eventually bring about tangible benefits in terms of time, cost, quality and safety. The Quantified Assessment approach appears to be the most practicable way of improving constructability. Originality/value -Up till now, there have been very limited studies providing an evaluation of different approaches for improving constructability. The study has offered an insight into the commonly adopted improvement measures, highlighting proven success cases, hence enabling effective strategies to be developed for enhancing constructability.