You can attach one or more parts to another part, or detach or explode the attached parts using the Added material commands.
When you modify the properties of attached parts, note that some of the part properties are taken from the main part. These properties are not shown in the properties of the attached part. You can inquire the properties of the whole part and the properties of each attached part separately. The attached parts are taken into account when calculating area, volume, and weight:
Weight (Gross) compares the weight with fittings and without fittings, and shows the biggest weight result without cuts and with attached parts.
Weight (Net) shows the weight with cuts and attached parts based on the geometry volume of the modeled part.
Weight shows the net weight.
Limitations
Connections must be added to the part to which other parts have been attached. You cannot add connections to an attached part.
All reinforcement components may not work correctly with parts that have been attached to each other using the Added material commands. The geometry of the parts is not always kept suitable for adding a component. For example, the reference points of the attached part may be lost and therefore the orientation information needed for adding the reinforcement is not known anymore.