Adding an Isovolume with the Fire Area Method

  1. Click the Add Item tab and select Isovolume from the dropdown menu.

  2. Leave the name as its automatically selected one

  3. Select Fire Zone: Fire Area Method Zone from the Zone dropdown menu

  4. Set the At Visibility value to 0.

  5. Click the Add Item button.


The new isovolume will appear in the Project Items tab and the 3D window. The solid black surface indicates areas not seen by any of the three flame detectors within the fire zone for the defined Fire Area size. As was mentioned in the last section, the zero visibility regions are significantly less using the Fire Area Method as the height and width dimensions is accounted for in the analysis.



Tutorial 13 - Figure 13 - Viewport Window screen capture of newly generated isovolume with three flame detectors


Changing the isovolume to view the 2ooN coverage and select the or more checkbox for the Fire Area Method ZoneThis will show the >2ooN coverage which was calculated to be 73.1%. This isovolume then represents all the areas which a 1m x 3m region is seen by two detectors at the same time and will be a slightly larger volume than using the Point Method.



Tutorial 13 - Figure 14 - Detect3D windows showing the 1ooN isovolume for the Fire Area Method fire zone


Remember that a new isovolume does not need to be defined for the Fire Area Method. You may opt to change the properties panel of any already defined isovolume to sync with a zone calculated with the Fire Area Method.


You have now completed Tutorial 13 and should have an understanding of how to define a zone using the Fire Area Method in Detect3D.



When you have finished viewing the results close the project.