The construction industry generates wealth and jobs, directly impacting the social and economic development of a country. Despite this positive impact, construction workers are exposed to many risks to their health and safety. Many elements in a project can present hazards to workers during the construction phase. With this in mind, it is of great importance to analyze and plan safety in the design phase, according to the Prevention through Design (PtD) concept. Despite the available studies on the subject, there is still a need for quantitative research, to help designers, without expertise in worker s safety, in the process of verification and analysis of project safety, with the purpose that construction workers risks are reduced by designing a safer design. To achieve that, a questionnaire was developed to assess the experience and opinion of professionals in the construction industry regarding construction safety planning. As a result, it was possible to observe that the practice differs from the opinion of the professionals, once the practice emphasizes safety planning in the construction phase, while in the respondents opinion, this planning should occur in the phases prior to construction, with emphasis on the executive design phase. This shows the importance of considering a safety analysis in the design phase. In addition, with the questionnaire, the levels of risk of various accidents were measured, composing the safety metrics of the project, developed in this research for the project s safety score evaluation. Thus, it was possible to define well-structured processes through the use of the BIM methodology, making it possible to support the designer in the decision processes through the evaluation of project safety, contributing to the development of a safer project for construction workers.