So you can visually check a system’s total coverage area, it’s possible to overlay coverage area circles on a drawing.

In the example above, you can see there are 3 different types of fire alarm device (each with a different colour), and the coverage area for each has been overlaid, allowing you to visually check coverage for the entire floor.

Coverage areas will also show on all other drawings within the same discipline (provided you set a scale on each drawing).

How does calculating coverage area help?

Being able to visually check the coverage area for certain device types (PIRs, Smoke Detectors etc) can be helpful when verifying whether a system meets certain operational or regulatory requirements.

For example:

  • You need to check whether a floor has enough smoke detection devices to meet a relevant regulation.
  • You need to check whether a floor has enough lighting control PIR devices to effectively switch lighting on and off.

How do I calculate coverage areas?

  1. Open a drawing and navigate to the “Measure” tab.
  2. Ensure you have a scale set.
  3. Navigate to the “Count” tab.
  4. Click on the symbol description you want to calculate a coverage area for.
  5. Click on the symbol description’s advanced options (small cog to the right of its name).
  6. Enter a coverage radius value in metres.
  7. Press enter or click outside of the coverage radius field to calculate the coverage area.
  8. Repeat steps 4–7 for each symbol description you’d like to calculate coverage areas for.

Can I calculate coverage for additional points on the drawing?

Yes, instead of navigating to the “Count” tab as mentioned above, stay on the “Measure” tab after setting a scale. Then repeat steps 4–7 for the symbols you'd like to calculate coverage for. Make sure you have “Point” selected, not “Linear” or “Area”.

How do I remove a coverage area?

  1. Click on the symbol description you want to remove the coverage area from.
  2. Click on the symbol description’s advanced options (small cog to the right of its name).
  3. Enter 0 into the coverage radius field.
  4. Press enter or click outside of the coverage radius field to see this change reflected on the drawings.

Learn more

How to: Understand the difference between real text and text-like elements.

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