Eleven free tools that turn excerpts from the City Statute, the Forest Code, the PPP Act and Reurb into direct calculations. They run in the browser, with no sign-up and no data collection.
Enter elevations and the width of the watercourse. Returns a traffic-light reading of subdivision feasibility (up to 30%, 30 to 47%, prohibited) plus the required riparian buffer (30m to 500m).
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CALC · OODCCalculates the counterpart in R$ to build beyond the basic floor area ratio. Formula from Law 16.050/2014 (São Paulo). Includes planning and social factors.
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SIMULATOR · REURBIn 4 questions, find out whether the case falls under Reurb-S (social interest, fee exemption) or Reurb-E (specific interest).
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WIZARD · INSTRUMENTFour-step wizard that points to the right instrument for each situation: PEUC, progressive IPTU, OODC, OUC, ZEIS, EIV, special urban adverse possession, or Reurb.
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CHECKLIST · SERRADiagnosis in 10 questions that cross-check Law 6.766, the Forest Code, Civil Defense, the City Statute and Reurb. Output is a traffic light plus a list of points to deepen.
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Input the Net Current Revenue. Output the cap on commitments to PPPs in force, the available margin, and scenarios by percentage.
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DASHBOARD · TIMELINESUniversal sanitation access (2033), end of open dumps, Petrópolis Master Plan review (overdue) and other critical deadlines with real-time countdown.
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Interactive map of the five districts of the municipality and markers of the three major tragedies: 2011 (Vale do Cuiabá), 2022 (Morro da Oficina), 2024 (Quitandinha).
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DATASET · RJTable of Master Plans for the main Rio de Janeiro municipalities, with year of approval, status (in force, attention, overdue) and a link to the official source.
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The law is public. Reading it, not always. Rarer still are the instruments that turn a technical passage into a practical answer. The Arsenic Tools are the third floor of the building that starts at the Diary (technical reading) and passes through the Library (full text): here, the law becomes a calculation, a diagnosis, a traffic light.
Everything is free. Everything runs in the browser. We do not collect data from users. There is no sign-up. The tools are simplified versions of calculations Arsenic runs internally on real projects.
Each tool states its limitations, gives the legal basis, and links to the full text of the law. Use it as a starting point, not as a final decision.