Chapter 12 Building Information Modeling 297
can be created as detail components instead of
modeling them. Modeling programs typically
provide a library of predefi ned detail compo-
nents for this purpose. See Figure 12-18.
Detailing plays a key role in the modeling
process because it provides fl exibility to the
designer. It also provides a way to meet accepted
drafting standards when preparing the detail
drawings.
Sheet Preparation
Each view created in the model can be com-
pleted by adding dimensions, annotations, and
any other information needed for construction.
Then, each view is inserted onto a sheet for
printing or plotting. The sheet contains a title
block and is named to identify the content. A
sheet naming convention that follows accepted
school or offi ce practice should be followed.
Sheets with inserted views can be included in a
project template to save layout time.
Sheets have the same relationship to the model
as views. If a view has been inserted onto a
sheet and changes are made to the model, the
view updates on the corresponding sheet.
Sheets are commonly plotted to an electronic
fi le format, such as portable document format
(PDF). Each sheet can be saved as a separate
PDF fi le when it is plotted. However, depending
Detailing
The tools of a parametric modeling program
make it possible to model with great accuracy
and precision. However, it is not necessary to
model every item for construction purposes or to
complete the drawing documentation. Depending
on the level of detail required, it is common
to create some features on detail drawings by
drawing 2D geometry, rather than modeling
in 3D. Often, the designer must consider the
time involved and decide which process is most
effi cient.
Detailing is the process of using 2D geometry
to represent non-modeled features in views.
Detailing is accomplished using detail lines and
detail components. Detail lines are view-
specifi c lines that appear only in the view in
which they are created. Detail components are
view-specifi c symbols that appear only in the
view in which they are created. Using detail lines
and detail components in a view is commonly
referred to as drawing “on top of” the model
geometry in a view. Detail lines and detail
components are used when additional detail is
needed to clarify the construction requirements.
Detailing is commonly used when preparing
drawings such as wall sections, which include
detailed features such as brickwork, wood
framing members, and fasteners. These features
Wood Framing
Fasteners
Molding
Images courtesy of Autodesk
Figure 12-18. Detail components are view-specific 2D symbols used for detailing. A library of predefined
components is typically supplied with parametric modeling software.
Copyright Goodheart-Willcox Co., Inc.