Friction Loss-Water Meter
If a water meter is included in your design, then you should account for the total friction loss of the water
meter. A water meter is considered part of the water utility. Typically it is not a part of the building. Often
it is not included in the design. Therefore, the default value is 0 psi.
Hazen-Williams C-factor
The C-factor determines the friction loss of the run using the Hazen-Williams formula. The factor “C” is
known as the “Hazen-Williams C” or “friction loss coefficient C.” The C-factor relates the relative roughness
of the interior wall of the pipe and varies between different types of pipe. The C-factor is typically 100 for
steel pipe and 130 for brass and copper. The default value used in sizing supply plumbing lines is 100.
Customizing Plumbing Content
Typically, CAD managers and other users create plumbing content. AutoCAD MEP provides 2 types of
plumbing content:
■
Style-based content
refers to 2D objects that are defined by styles. Styles are sets of properties and
associated view blocks. In plumbing drawings, style-based content includes plumbing lines, plumbing
fittings, and schematic objects for schematic diagrams.
■
Catalog-based content
refers to 3D objects that are defined by part definitions and associated part models,
and are grouped into part catalogs. In plumbing drawings, catalog-based content includes plumbing
equipment (called multi-view parts, MvParts, or parts) and plumbing fixtures.
You specify systems (a type of style) for catalog-based content. A system stores properties that all building
system objects assigned to the system can share. This gives a consistent look and feel to the
a drawing. See
Working with Style-Based Content
Working with Catalog-Based Content
on page 79 for more information on content types.
Creating Style-Based Content
on page 599 that defines plumbing lines, plumbing fittings,
and schematic objects. You convert batches of existing objects to
ways:
■
Convert the schematic symbol styles provided with AutoCAD MEP to their individual components (the
settings and the view blocks), customize the components, and then convert the components back to
schematic symbol styles
■
Convert a batch of AutoCAD blocks in a custom block library to schematic symbol styles
Creating Catalog-Based Content
You can create 2 types of catalog parts,
is a content creation tool that includes 3D modeling and 2D drawing features. For more information, see
Building Parametric Fittings Using Content Builder
Creating Block-Based Parts Using Content
on page 754.
Configuring Plumbing System Definitions
This section explains how to configure properties that control the appearance and behavior of objects in
your plumbing system designs.
Customizing Plumbing Content | 477
Summary of Contents for 235B1-05A761-1301 - AutoCAD MEP 2010
Page 1: ...AutoCAD MEP 2010 User s Guide March 2009 ...
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Page 242: ...Modifying the elevation of a duct 224 Chapter 6 Drawing HVAC Systems ...
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