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This section will explain how to use the Wblock command (which you learned about in Chapter 4), to create a separate stair using the stair you’ve already drawn for the lobby. Although you haven’t turned the existing stair into a block, you can still use-Wblock to turn parts of a drawing into a file

I, If you closed the Lobby , open it now. If you didn’t create the Lobby drawing, open the Lobby. dwgfile from the companion CD-ROM.
2. Click File >- Export or type export.
3.’ When the Export Data File dialog box appears, enter stair.dwg in the File Name input box and click Save. By including the .dwg filename extension, AutoCAD knOW5that you want to export to a drawing file and not some other format, such as a .dxf or .wmf file format.
4. AttlleEnter name of existing block or [= (block=output file)/* (whole drawing)] <define new drawing>: prompt,press.J. When you export to a .dwg format, Aut()CAD assumes )’l’U want to export a block. Bypassing tlus prompt by prcssing ,i tellsAutoCAU that you want to create a file from part of the drawing, rather than from ,) bloc k.
5. At the Inserti on base poi nt: prompt, pll k the lower-right corner of the stair shaft. This tells pOint fllr the new drawing.
6. At the Se1ect obj ects: prompt, use a window to select the stair shaft, as shown in Figure 5.24. ‘
7. When the stair shaft, including the door, is highlighted, press.J to confirm your selection. The stair disappears.
8. Since you want the stair to remain in the lobby drawing, click the Undo button to bring it back Undo does not affect any files you may export with File» Export, Wblock, or the Make Block tool

Drawing Parallel Lines

Frequently, when working on an architectural project, you will first do your schematic layout using simple lines for walls. Then, as the design requirements begin to take shape, you can start to add more detailed information about the walls, for example, indicating wall materials or locations for insulation. AutoCAD provides muliilines (the multiline command) for this purpose. Multilines are double lines that can be used to represent walls, Multilines can also be customized to display solid fills, center lines, and additional types shown in Figure 5.25. You can save your custom multilines as Multiline styles, which are in turn saved in special files for easy access from other drawings.

The following exercise shows you how you might continue to build information into your drawings by using multilines to indicate wall types.

1. Click the Multiline tool on the Draw toolbar, or type ML You’ll see two lines in the prompt area:
2.Type S..1(for Scale).
3. At the Enter mli ne seale <1. 00>: prompt, type 5..1
4 Pick a point to start the double line.
5 Continue to select points to draw more double line segments, or type C.1to close the series of lines.

Let’s take a look at the meaning of the multiline settings included in the prompt you saw in steps 1 and 2 above.

Justification Controls how far off center the double lines are drawn. The default sets the double lines equidistant from the points you pick. By changing the justification value to be greater than or less than 0, you can have AutoCAD draw double lines off center from the pick points

Scale Lets you set the width oi the double line.

Close Closes a sequence of double lines, much as the Line command’s

Close option does.

Style Lets you select a style for rnultilines. You can control the number of lines in the multiline, as well as the line types used for each line in the multiline style, by using the Mledit command.

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