________CIVL114 LAB 4

Outline Exercise 1 – solving an intersection problem  Point Style  Rotate  Modify Dimension Style Exercise 2 – stirrups  Fillet  Polyline  Stretch

Exercise 1 : Solving an intersection problem in surveying Determine the coordinates of C (983.5,1340) (950,1200)

Open with no template - Metric

Step 1 Draw points A and B Change the point style Draw a line from point A to point B

Drawing Points Or press this button

Setting point style

Zoom extents (show everything drawn) Type z  “enter”  e  “enter” (or use zoom buttons)

Turn on “node” & “intersection” object snap modes

Finish step 1 Press this button or type L

Step 2 Rotate AB by 49 o 27’ 18” to form AC Redraw line AB Rotate AB by 37 o 14’ 36” to form BC

Rotate Or press this button

Pick line AB (object to rotate) Pick point A (rotation center) Enter -49D27’36” (negative = clockwise angle in AutoCAD) oRotate AB once more, into BC (37 o 14’ 36” for anticlockwise angle)

Finish step 2

Step 3 Dimension the angle Modify the dimension style Use ID command to find coordinates of point C

Dimensioning

Modify the dimension style

ID (to obtain coordinates of a point)

Exercise 2 : Stirrups Main commands involved:  Fillet  Polyline  Stretch

Step 1 Draw two rectangles Round the corners of the inner rectangle using FILLET

Draw a 1400 x 1000 rectangle

Offset by 55 units

Fillet (R=35)

Step 2 Draw an arc and two lines at bottom left corner Widen the line width of the stirrups (lines inside the rectangle)

Circle Draw a circle with a radius of 35 units (type C or use “Circle” button)

Polar

Draw a line

Copy 2 lines

Trim

Delete Select the object and press “Delete” button. You can press “Esc” to unselect the object Or use ERASE (E) command

Polyline Or type PEDIT

W=10

Finish Step 2

Step 3 Dimensioning Modify the dimension style Stretch

Linear

Add tool bars

Modify the dimension style Or this button

STRETCH Mouse goes from right to left (“crossing window”)

Click to give (any) first point

Final (2800 x 800)