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In the exercise for finishing the Unit plan, you used the real command or accu·r.ately place a gap In a over the entry In Chapter 3, you broke a line at a Singlepoint to create multiple, contiguous line segments. In both casesyou used the Foption. You cap also break a line without the Foption with a little lessaccuracy.By not using the Foption, the point at which you select the object is used a’sthe first break point. If you’re in a hurry, you can dispensewith the F opt.onand simply place.a gap in an approximate location. You can “then later use other tools to adjust the gap. In addition, you can use locations on other objects to seiect the first and second points of a break. For example, you may want to align an opening with another opening some distance away. Once you’ve selected:fine to break, you can then use the F option and select two pomts on the eXisting opening to define the first and second break points. The break points will align In an orthogonal duection to the selected POints

Using and Osnap Tracking as a Construction Line Tool

Now you need to extend the upper wall line 5″ (13cm for metric users) beyond the right-side interior wall of the unit. To accomplish this, you will use Polar Tracking to locate the endpoint of the line. Start by changing the Polar Tracking setting to include a 5° angle

1. Right-click the Polar button in the status bar, then select Settings. The Polar Tracking tab of the Drafting Settings dialog box appears.
2. Select 45 from the Increment Angle drop-down list in the upper-left comer of the dialog box.
3. In the Object Snap Tracking Settings button group, make sure that the Track Using All Polar Angle Settings option is selected, then click ok

You’re ready to extend the wall line For this .-peration, you’ll use grip editing. 1.1 Click the wall line at the top of the plan to the right of the door to select it and expose its grips

2. Click the ORTHO mode button to turn on Ortho mode in the status bar. This keeps the wall line straight as you edit it.
3. Click the right-most grip of the line to make it “hot.”
4. Place the cursor on the upper-right comer of the plan until you see the Endpoint Osnap marker, then move the cursor away from the comer at a 450 angle. The Osnap Tracking vector appears at a 450 angle. Notice the small X that a?pear~ at the intersection of the Osnap Tracking vector and the line.

With the Osnap Tracking vector and the line intersecting, click the mouse button. The line changes to extend exactly 5 units beyond the vertical interior wall of the ‘plan
5. Press the Ese key twice to clear your selection, then repeat the process for the horizontal wall line to the left of the door to extend that line to the left comer.
6.. Click View> Zoom> All to view the entire . It will look like

In this exercise, you used Polar Tracking and the Ortho mode to accurately position the two lines used for the exterior walls of the studio unit. This shows you how you can take advantage of existing geometry with a combination of tools in the status bar.

Now you will finish the balcony by adding a sliding glass door and a rail. This time, you will use lines for construction as wen as for parts of the drawing. First, you’ll add the door jamb by drawing an Xline, An Xline is a line that has an infinite length, but unlike the ray, it extends in both directions. After drawing the Xline, you’ll use it to quickly position the door jambs.
1. Zoom into the balcony area.
2. Click the Construction Line tool on the Draw toolbar, or type . You’ll see this prompt:
3. Type 0..1 to select the Offset.
4. At the Offset di stance: prompt, type 4′..1. Metric users should
5. At the Se1ect objects: prompt, click the wall line at the right
6. At the Si de to offset: prompt, click a point to the left of the wall. The Xline appears (see the top image of Figure 5.18).
7. At the Se1ect obj ects: prompt, click the left wall line, a+d then click to the right of the selected wall to create another Xline. Your drawing should look like the top image of Figure 5.18.

Next, you’ll edit the Xlines to form the jambs.

8. Click Trim from the Modify toolbar.
9. Select the Xlines and the two horizontal lines representing the wall between the unit and the balcony, and press  You can use either a crossing window r select each line individually. You have just selected the objects to trim to.

10. Click the horizontal lines at .lIly point between the two Xlines. Then click the Xlines above and below the horizontal lines to trim them. Your drawing wiIllook like the bottom image of Figure 5.18.
11 Add lines on the Ceiling layer to represent the door header.
12 Now draw lines between the two jambs (on the Door layer) to indicate a sliding glass door .

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