🏢 Building Areas & Occupancy Types
📊 Calculated Requirements
ILLINOIS PLUMBING CODE CALCULATOR
FOR PLANNING PURPOSES ONLY
This plumbing fixture calculation tool determines water closet and lavatory requirements for mixed-use buildings based on specific occupancy types for each area. The tool can perform individual calculations for separate tenant spaces or combined calculations using Assembly occupancy rules (the most restrictive) for shared facilities. It assumes a 50% male and 50% female occupancy split and follows Illinois Plumbing Code requirements (Title 77, Part 890), though users should verify local jurisdiction requirements for mixed-use buildings. The tool accounts for the complexity of multi-tenant spaces while noting that employee facilities, accessibility requirements, and final approvals from local authorities may need separate consideration beyond the basic calculations.