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Purpose The purpose of this paper is to present an exploratory study which aims to assess the potential use of 3D mapping of buildings and construction sites using unmanned aerial system (UAS) imagery for supporting the construction management tasks. Design/methodology/approach The case studies were performed in two different residential construction projects. The equipment used was a quadcopter equipped with digital camera and GPS that allow for the registry of geo-referenced images. The Pix4D Mapper and PhotoScan software were used to generate the 3D models. The study sought to examine three main constructs related to the 3D mapping developed: the easiness of development, the quality of the models in accordance with the proposed use and the usefulness and limitations of the mapping for construction management purposes. Findings The main contributions of this study include a better understanding of the development process of 3D mapping from UAS imagery, the potential uses of this mapping for construction management and the identification of barriers and benefits related to the application of these emerging technologies for the construction industry. Originality/value The importance of the study is related to the initiative to identify and evaluate the potential use of 3D mapping from UAS imagery, which can provide a 3D view of the construction site from different perspectives, for construction management tasks applications, trying to bring positive contributions to this knowledge area.

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Safety management (SM) is considered a complex task during the construction phase, given the number of high-risk activities that can lead to accidents. The differences between work as done (WAD) and work as imagined (WAI) is one of the main barriers faced by safety management. The Resilience Engineering stand out that improving in safety performance cannot be simply achieved through the use of procedures and barriers, but through the continuous monitoring. On the other hand, the use of Unmanned Aerial Systems (UAS) technology can contribute to the safety management system to support the monitoring of the daily work. This study aims to evaluate how work is performed from RE perspective through the application of the safety checklist based on the assets collected with UASs on site, focusing on the cast-in-place concrete wall constructive process, once it involves high risk of accidents during construction. For this, an exploratory case study in a construction project was conducted in Brazil, involving the following steps: (a) development of a safety monitoring protocol using UASs, (b) field tests for monitoring safety conditions with UASs along 35 weeks, and (c) data analysis. As contribution, this work identifies potential improvements on safety procedures aiming to reduce the differences between prescribed and actual work. In addition, the UASs can be used to perform regular and redundant safety inspections providing information to support managers' decisionmaking.

Purpose The purpose of this paper is to present an exploratory study in order to understand the contributions of the resilience engineering (RE) concept and the use of unmanned aerial systems (UASs) technology to support the safety planning and control (SPC) process. Design/methodology/approach A case study on a construction project was conducted and involved the following steps: diagnosis of the SPC process; development of a safety monitoring protocol using UASs; and field tests to monitor safety performance using UASs and data analysis. Findings In terms of its theoretical contribution, this work presents a conceptual framework explaining how the RE and the UASs can contribute to the SPC process. Also, this paper provides, as a practical contribution, a protocol for safety monitoring with UASs integrated into the safety routine, highlighting the tasks that can be checked and unsafe conditions and safety/production conflicts identified through monitoring. Practical implications This study can be used to support and stimulate the construction managers who wish to adopt the RE concepts and UAS technology to improve safety management. Social implications An efficient SPC process can improve the work conditions at construction sites, contributing with the reduction of accidents rates. Originality/value The paper highlights the need to adopt new approaches, as RE concepts and UAS technology to support the SPC process, in order to improve safety conditions at construction sites.

Embora diversos estudos tenham explorado o potencial do VANT para apoiar atividades de segurança em canteiros de obras, esta aplicação ainda tem sido limitada, em parte pela falta de integração do monitoramento com VANT e seus produtos à gestão da segurança das obras. Diante desta problemática, este artigo busca identificar como o VANT pode ser integrado ao processo de gestão da segurança de obras utilizando como estratégia de pesquisa a revisão sistemática da literatura. O VANT tem sido aplicado, principalmente, para monitorar as condições de segurança do canteiro, mas as informações coletadas nesta etapa podem apoiar todo o ciclo de melhoria contínua da segurança.

RESUMOA construção civil brasileira tem se desenvolvido muito nos últimos anos, porém a ineficiência de alguns processos e os métodos construtivos artesanais de determinadas operações têm provocado uma produtividade ainda não satisfatória nos processos. Apesar dos avanços do setor em termos de materiais e técnicas construtivas, grande parte do subsetor de edificações ainda utiliza mão de obra de baixa qualificação profissional, bem como pouca mecanização, utilização de processos convencionais e técnicas simples. Diante disto, surge a necessidade de mensuração de indicadores de produtividade relacionados ao processo de paredes de concreto, por ser um sistema mais recente no mercado brasileiro e que apresenta ausência de dados de produtividade. Este trabalho tem como objetivo principal implementar um sistema de indicadores para o processo construtivo de estrutura em parede de concreto, por meio da mobilização do setor e comparação de seus desempenhos. O método de pesquisa deste trabalho envolveu: (a) sensibilização e capacitação das empresas participantes, (b) seleção das obras e concepção dos indicadores, (c) coleta dos dados e visitas de acompanhamento, (d) análise dos dados e reuniões para troca de resultados e experiências e, por fim, (e) análise comparativa entre as obras e seus processos utilizados. Esta pesquisa contribui para a criação de um banco de dados com informações sobre produtividade em paredes de concreto, que retratará o desempenho das obras de Salvador, fornecendo, subsídios para planejamentos, orçamentos, e avaliação de produtividade dentro da obra. Palavras