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Abstractesides increasing productivity, prefabricated building systems can also contribute to the reduction of the levels of risk exposure by workers. However, there are several hazards that can be faced by workers involved in the assembly of prefabricated components, such as being struck by objects during lifting and handling of large components, and falls from height. This paper is focused on the assembly process of precast concrete building systems, widely used in Brazil. It is uses the Resilience Engineering theoretical framework, which has been pointed out as the new paradigm to manage health and safety, being concerned with the abilities of a system to adjust its functioning prior to, during, or following changes and disturbances, so that it can sustain required operations under unexpected conditions. The aim of this paper is to propose guidelines to design preventive measures, based on the identification of resilient skills used by front-line workers involved in the process of assembling precast concrete structures. Those skills were identified in a case study carried out in a construction site in Brazil, in which some critical assembly processes were analyzed at a fine level of detail. Keywords

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Construction projects are known for their complexity characteristics, such as a large number of stakeholders, uncertainty, and a dynamic work environment. These characteristics imply that different approaches for safety management can be useful under different circumstances. For example, low severity occupational accidents are fairly common in most construction sites, and therefore these events offer useful learning opportunities. In turn, resilience across managerial and operational levels is probably ubiquitous in construction sites, regardless of being taken for granted and neglected as a source of learning. Therefore, there is an opportunity for the joint use of how Safety-I and Safety-II in construction, giving rise to more effective safety management. This paper explores how Safety-I and Safety-II can be jointly adopted in construction. The discussion is based on two case studies, one from Brazil and another from Norway, in which two safety practices -safety planning and event reporting -were analysed from the perspectives of Safety-I and Safety-II. We conclude that these two perspectives can be integrated into established practices allowing organisation to learn from accidents, incidents as well as from everyday operations.

Resumo mbora o uso de sistemas de proteções periféricas (SPP) seja importante para prevenir quedas de altura na construção civil, a literatura não apresenta de forma abrangente os requisitos de desempenho para a avaliação do desempenho dos mesmos. O objetivo deste estudo consiste em propor um conjunto de requisitos para avaliar o desempenho para estes sistemas. Foi desenvolvido um protocolo que contém critérios qualitativos e quantitativos para a avaliação de desempenho em relação a 33 requisitos de desempenho, sendo 15 referentes à segurança, 12 à eficiência e 6 à flexibilidade. Para ilustrar a aplicação deste protocolo, foi avaliado um conjunto de equipamentos disponíveis no mercado da Região Metropolitana de Porto Alegre -RS, de madeira, metálicos e mistos. Os resultados das avaliações desses equipamentos foram discutidos com representantes de empresas construtoras, especialistas em segurança no trabalho, projetistas e fornecedores de SPP, com a finalidade de propor melhorias nestes equipamentos. Os pontos fortes e fracos de cada sistema são discutidos com base nessas aplicações. Palavras-chave:Sistemas de proteção periférica. Requisitos de desempenho. Segurança e saúde no trabalho. AbstractAlthough the use of temporary edge protection systems (TEPS) is an important measure to prevent falls from heights on construction sites, the literature does not present a comprehensive set of performance requirements for those systems. The aim of this study is to propose a set of requirements for assessing the performance of TEPS. A protocol was developed, containing qualitative and quantitative criteria for assessing the performance in relation to 33 performance requirements, in which 15 are related to safety, 12 to efficiency and 6 to flexibility. The application of this protocol is illustrated in the evaluation of a number of equipment available in the Metropolitan Region of Porto Alegre, made of wood, steel, and mixed materials. The results of the evaluation were discussed with representatives of construction companies, safety experts, designers of TEPS, and suppliers of those systems. The limitations and strengths of each TEPS are discussed based on those applications.

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