To be able to use HydraCAD with a background drawing, you need to do these simple steps:
Step 1 - Start a new drawing using one of the HydraCAD templates. Answer the scale question if asked. This is non-negotiable!
Step 2 - Insert the background drawing into the new HydraCAD drawing, exploded. Meaning, checking the Explode option
If you need help with the new AutoCAD 2020 Insert command, read this post: Using the AutoCAD 2020 Insert Command
That's really all you have to do to start working!
Next Steps
To convert existing sprinkler heads into HydraCAD heads, read this post: Working With Background drawings #1 - Changing Sprinkler Head Symbols
To convert existing piping into HydraCAD piping, read this post: Working With Background Drawings #2 - Changing Piping
If you are not happy with the colors or line-types of the existing steel, walls, ceilings, structures, etc - then feel free to change them. But, this does not need to be done to use HydraCAD effectively
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