Use this dialog box to enable or disable proximity checking for pipe networks, and to specify a distance or scale factor for the proximity check.
This option is available for checking a single pipe network, or for comparing two pipe networks to determine if any parts from one network are too close to parts from another network.
When this option is selected, the interference check looks for and detects the proximity check conditions specified on this dialog box. When this option is not selected, the interference check does not check for the proximity conditions specified on this dialog box, and the proximity checking options are not available (grayed out). Whether proximity checking is enabled or disabled, the interference check still checks for parts that physically collide.
When this option is selected, you can enter a distance. When the interference check is run, any pipe network parts within the specified distance away from each other (on any side) are marked as an interference.
When this option is selected, you can enter a value that is used as a scale factor. When you enter a scale factor value, Autodesk Civil 3D calculates the limits of the part (the pipe or the structure) multiplied by the scale factor value that is specified. For example, if the pipe diameter is 600mm, and you specify a scale factor value of 2, Autodesk Civil 3D identifies any interferences within a distance of 1200mm (or the pipe diameter, which is 600, multiplied by the scale factor value, which is two). When the interference check is run, any pipe network parts within that distance away from each other (on any side) are marked as an interference.