Follow a study from model import and coordinate setup through detector placement, coverage calculation and results.
Follow the workflowNavisworks 3D DWF import · Flame & gas mapping · Windows desktop
A dedicated import workflow brings 3D DWF models exported from Autodesk® Navisworks® software, alongside GLB, glTF, OBJ and STL files, into the same workspace used to place detectors and calculate coverage.
Open your .NWD model in Navisworks Manage or Simulate and export it as a 3D DWF file. In safe3D, open File → Import → DWF (3D Model) and select the exported Navisworks model. safe3D scans the file before preparing the model for analysis.
Import the accepted model or enter crop bounds for the area you want to assess. Review size and estimated memory demand before continuing.
When a model uses large coordinates, smart import can translate the study area to simpler working coordinates near the local origin. safe3D retains the original coordinate reference, with options to use the original coordinates during assessment. This makes it easier to check detector and zone locations against the native 3D model.
Right click and drag on the model to add a zone. Right click at the desired location to add a detector. This intuitive workflow keeps zone creation and detector placement in the 3D view, with the imported equipment and structures included in flame obstruction checks.
Define what you are assessing before interpreting a coverage percentage.
Set the study boundaries and sampling grid. Add subzones for local areas and null zones for space you want excluded from the calculation.
The result refers to a defined assessment volume.
Set flame detector position, orientation and field of view. Place point gas detectors or define the transmitter and receiver for an open path detector.
The layout is tied to positions in the model.
Use risk grades to assign the detection coverage targets established for your assessment, guided by the performance based approach in ISA TR84.00.07. Configure coverage targets, flame field of view scaling, gas cloud sizes and gas voting logic for each risk grade.
Review calculated coverage against the targets assigned to your assessment zones.
Explore the calculation and the view it produces. The images below are captured from safe3D.
safe3D evaluates sample points against each enabled flame detector’s field of view and checks whether the imported geometry blocks the line of sight.
Set the low and high alarm cloud sizes in the risk grade. safe3D evaluates point and open path gas detectors against the configured cloud and alarm parameters.
This is geometric gas detection mapping. Gas cloud sizes are inputs to the study; these views do not simulate a dispersing release.
Inspect an isocontour at a selected elevation or an isovolume in 3D. Select the detection level you want to examine alongside zones and equipment.
Spatial views depend on the study geometry, sampling resolution and selected coverage settings.
Review coverage numerically, then export the data and model views needed to explain the study.
Review fire and gas results by zone. Read 0ooN as uncovered, 1ooN as coverage by at least one detector, and 2ooN as coverage by at least two.
Export detector schedules, zone definitions, risk grades and fire or gas coverage results for use in your own documents.
Bring detectors, zones, risk grades and coverage results into separate worksheets. Choose working coordinates, original source coordinates, or both.
Export a screenshot of the model and coverage visualisation to illustrate the locations being discussed.
Connect individual detector performance to the coverage of the layout as a whole.
Review the additional and cumulative coverage contributed by individual flame detectors, calculated from the study results.
See which detectors add coverage to the layout.
Rank flame detectors by the change in 1ooN and 2ooN coverage when each detector is disabled.
Compare the effect of losing a detector.
Bring study settings, coverage results and model views together in a report that can be shared for review.
Present the assumptions alongside the results.
Open your .NWD model in Navisworks Manage or Simulate and export the required 3D geometry as a 3D DWF file. Import the exported Navisworks model into safe3D, where the import workflow scans the model and lets you select a study area.
It describes the calculated detection coverage of the eligible sample points in your configured zone. Geometry, detector settings, exclusions, grid spacing and study criteria determine the result. A percentage should be reviewed together with those inputs and the spatial coverage view.
When a model uses large coordinates, smart import can translate the study area to simpler working coordinates near the local origin. safe3D retains the original coordinate reference, with options to use the original coordinates during assessment. This makes it easier to check detector and zone locations against the native 3D model. The Pro Excel export can include working coordinates, original coordinates or both.
Save your initial study and export its results. Change detector positions, orientations or enabled states, recalculate coverage, and compare the new percentages and spatial views using the same study settings.
Understand the study process, coverage measures and the workflow behind the results.
From the detection objective to a documented assessment of your detector layout.
Read the mapping guide →Assessment volumes, coverage targets and the meaning of 1ooN and 2ooN.
Explore volumetric coverage →Import the model, define zones, position detectors and review the calculated results.
Follow the workflow →Tell us about your model format, the study area and the detectors you need to assess.
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