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Assign Solid Material

Gives solid groups and components a material from a list, with its density, so that Balance can calculate their weight.

Group: Measure
Works on: The solids in your selection, or in the whole model if nothing is selected, including nested ones. Groups that aren't solid are skipped. In a component, every copy gets the material.
Changes the model?: It stores the material and density on each solid. The shape and the colours are not changed.
Version: Full

How to use it

Select the solids that are made of one material, or nothing for all solids.
Click Assign Solid Material. The dialog shows how many solids it will change.
Choose the material from the list and click OK.
Repeat for the parts made of other materials.

Materials in the list

The list starts with seven materials. You can add your own, or delete ones you don't use, in Settings.

Default materials
Material	Density
Iron	7,860 kg/m³
Water	1,000 kg/m³
Aluminium	2,700 kg/m³
Wood	700 kg/m³
Glass	2,500 kg/m³
Plastic	1,000 kg/m³
Lead	11,300 kg/m³

Before and after

The Assign Solid Material dialog with a list of materials and Wood selected, for 49 solids — Before: choosing Wood for 49 solids.

SketchUp message: Wood material assigned to 49 solids with the density of 700 kg/m3 — After: "Wood Material Assigned to 49 Solids with the Density of 700 kg/m3".

Limitations

The weight is the solid's volume times the density, so the model has to have the real shape. A part drawn full but made hollow will come out too heavy.
Real materials vary: wood, plastic and glass especially. For an exact figure, add your own material with the density from your supplier.
If you already know a part's weight, use Assign Weight instead.

Check the result

Run Balance: every solid shows its weight next to it.