Graphics Programs Reference
In-Depth Information
Used In Size Lists vs. Used In Sizing
In the Mechanical Settings dialog box, Used In Size Lists means that
the drop-down list for available sizes will contain this pipe size; this
drop-down list can be easily accessed while routing or modifying pipe
in the Generate Layout tool. Think of the Used In Sizing option as
granting Revit permission to use a particular pipe size when using the
duct- or pipe-sizing utility. If neither is selected, the size will not be
available to the user.
Figure 9.22
Pipe sizes
Fittings should be assigned after sizes and materials for a couple of reasons.
First, the connection type needs to match. A solvent-welded PVC fitting and
a flanged steel fitting are vastly different. Second, the fittings need to be
defined at all the available sizes for that type of pipe; if it goes down to 3/8″
(10 mm) or up to 36″ (900 mm), the fitting needs to accommodate. Fittings
are specific to the type of system, which is another reason to separate pipe
types for plumbing and mechanical uses.
Hydronic systems have value even if the equipment is not piped together.
Terminal box reheat coils are a good example because details generally
cover their final connections. By simply adding all the terminal boxes to a
