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How to split a building with mixed usage

Model a building that has more than one usage, e.g. a property with both housing and shops.

You’re on Building and operation, in the Usages table.

  1. Click Add usage for each actual use in the building: a new row is created in the table for each one.
  2. Fill in heated floor area and BBR category for each individual usage.

The limit value is calculated as an area-weighted limit across the usages, per BR § 297(5) and §298(4).

Trap: if heated floor area is missing on even one usage, the area-weighted limit value can’t be calculated at all, not just for that usage, but for the whole building.