/GRBRIC

1.	A brick group is a set of bricks (only). It can be defined by a list of:

•

brick ID

•	subsets or parts (all bricks belonging to the listed subsets/parts are included)

•	submodels (all bricks defined in the listed submodels are included)

•	property sets or materials (all bricks having those Property Type's/MID's are included)

•	brick groups

•	a box (all bricks within a defined box are included)

2.	Brick groups may include tetrahedron and hexahedron.