UPDATED

5. The next step is to tell BricsCAD that these are walls. You do this with the bimClassify command.
: bimclassify
Classify entities as [Wall/Column/Slab/Beam/wIndow/Door/building Element/Other/Auto/Unclassify]:
w
Select entities to classify: all
Entities in set: 4
Select entities to classify: (Press Enter to finish)
BIM data assigned to 4 object(s)
6. With the walls in place, the next step is to define their composition — what are the walls made of? Here is the
composition of typical walls in homes of North America:
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Exteriors of walls consist of exterior and interior cladding that give walls their look. Cladding is
made from bricks, wood, gyproc (drywall), and so on.
Tyvek in white and brick cladding in brown
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Interior of walls provides strength through 2"x4" (interior walls) or 2"x6" (exterior) studs made
of wood or metal. The strength of walls is needed to hold up walls, roofs, and so on. Extra pairs
of 2"x6"- or 2"x10"-sized beams, called headers, are needed over window and door openings to
distribute weight.
Between the studs is insulation that retains the building’s heat in winter and keeps out heat in summer.
Depending on local construction bylaws, Tyvek-style wrap may be needed to keep out moisture
and wind. The photo shows the white Tyvek wrap, along with some brick exterior cladding.
Also between the walls are utilities, such as electrical wiring and plumbing, but these are not defined
by compositions.
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The composition of walls in BricsCAD is defined through the bimAttachComposition command. You attach
“compositions” to walls, floors, and roofs to define what they are made of:
To use 40 or so compositions provided by BricsCAD, use the BIM Compositions panel; access it by rightclicking
any toolbar or the ribbon, and then choosing BIM Compositions from the shortcut menu. See
figure at left, below.
To define your own materials and edit existing ones, use the Physical Materials dialog box (formerly
named the Building Materials dialog box. Access it by clicking the Materials button in the BIM Compositions
panel. See figure at right, below.
7 BIM. Sheet Metal, & Communicator 225