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Chapter 6 Working with Pipes
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You can use this dialog box to modify structures or create new ones to be used
when nodes are drafted in the finish profile. The structure definitions are stored
in the bldcor.pst and blkdef.pst files, located in the c:\Program Files\Land
Desktop R2\land\prot\pipewks folder. You can define structures only through
this dialog box.
3 Click Add to display the Structure Library Entity dialog box, in which you can
add a new structure to the current structure library.
4 In the Enter Entity Name box, enter an entity name, and then click OK. You
can also select an existing name from the Name list in the Library Reference
section and make changes to it.
A copy of the current structure library entity is made, and the Structure Library
Entity dialog box is displayed.
5 In the Library Reference section, set the names and descriptions of various
structure library symbols that have been defined by doing the following:
n
In the Name list, select the structures for representing the defined run nodes.
n
In the Description box, type a brief description of the structure in the
structure library.
Two special structures are available: null and null2. There are a number of
conditions in which you could specify one of these null structures. The first is
when you want no structure drawn at all. The second is when you need to
eliminate overlapping structures-when a lateral joins an existing pipe run, for
example. The third occurs when drawing a pipe run with a bend, or a multi-
segment portion of a pipe run rounding a corner, where it is unnecessary to
have a manhole at the end of each segment.
Specifying the null structure results in no structure being drawn in either plan
or profile view, while the null2 structure is drawn on the profile but not the