Reviewing The Sizing Results For Supply Plumbing Lines; Calculations For The Longest Run - Autodesk 235B1-05A761-1301 - AutoCAD MEP 2010 User Manual

Reviewing the Sizing Results for Supply Plumbing Lines

Two sections of the Size Supply Plumbing Line dialog provide you with final calculations:

Calculations for the Longest Run

Calculations at Selected Component
Calculations for the Longest Run
When you select a supply system to size, the plumbing module highlights all plumbing lines, fittings, and
fixtures connected to, and downstream from the specific plumbing line you select. It then identifies the
longest run in the system by calculating the equivalent plumbing line lengths of all connected fixtures,
fittings, and valves.
The longest run is defined as the longest run in an entire network of connected runs in a system. It is the
main run used to determine the sizing requirements. Typically, it connects the booster pump to the limiting
fixture (the fixture located at the highest elevation in the building).
The Calculations for the Longest Run section of the Size Supply Plumbing Line dialog contains the
non-editable, calculated values for the longest run.
Calculations for the Longest Run section
Developed Length
Developed Length is the length of the longest run, including the equivalent length of the fittings. The
plumbing module passes through the entire plumbing system to obtain the plumbing line length of each
fixture. The program then refers to the supply plumbing line sizing table (pipe sizing table) that you selected.
The sizing table provides the equivalent plumbing line length values associated with each fitting and valve
on the run, so that these values can be included in the calculation. The run that has the highest value for
the equivalent plumbing line length is considered to be the limiting run, or the run that requires the most
resistance.
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