Calculate BTA, BRA and BIA floor areas per SS 21054 from IFC

Floor areas per SS 21054 (BTA/BRA/BIA – gross/usable/secondary floor area per the Swedish standard SS 21054 – plus A-temp) are needed for everything from detailed development plans to energy calculations. Yesper calculates them straight from the IFC model and reports them per storey. Most valuable in the design stage.

How to do it in Yesper

  1. Add the IFC file.
  2. Ask Yesper to calculate BTA, BRA, BIA and A-temp.
  3. See the areas reported per storey.
  4. Review in Yesper and download to Excel if needed.

Settings & tips

  • Ask for reporting per storey and per building.
  • Look at storeys the self-check flags as area outliers.

Example prompts

Simple

Calculate BTA and BRA from our IFC model.

Advanced

Calculate BTA, BRA, BIA and A-temp per storey according to SS 21054 from the IFC model in Secure folders and compile in a table per building.

FAQ

Which standard is followed?

SS 21054:2020.

Do I get areas per storey?

Yes, reporting is per storey.

Can I get it per building?

Yes, state the breakdown.