1. Unit 4 Extension Lines And Dimension Lines
Part 1-Section 1 Lines
Unit 4 Extension Lines And Dimension Lines

2. Extension Lines Used in dimensioning to show size
Thin, dark, solid lines
Extend away from object

3. Example Application

4. Dimension Lines
Size descriptions
Fractional
Decimal
Metric

5. Dimension Lines
Thin lines
Broken at dimension
Ends in arrowheads

6. Dimension Lines Arrow size determined by Prefer closed arrowhead
Dimension line thickness
Drawing size
Prefer closed arrowhead
Projects 1/16 beyond dimension line

7. Print Reading Assignment-Unit 4
Angle Brace (BP-4A)
Print Reading Assignment-Unit 4

8. Name the material specified for the Angle Brace.

9. What is the overall length of the brace from left to right?

10. What is the overall height from the top of the brace to the bottom?

11. What is the width of each leg of the brace?

12. What is the thickness of the metal in the Brace?

13. What is the name given to the kind of line marked , and ?B C

14. What kind of lines are and ?

15. What kind of lines are and ?G

16. Why are object lines made thicker than extension lines and dimension lines?

17. Print Reading Assignment-Unit 4
Corner Plate (BP-4B)
Print Reading Assignment-Unit 4

18. What kind of line is ? A
NOTE:
DIA. = DIAMETER
R = RADIUS

19. What kind of line is ? B
NOTE:
DIA. = DIAMETER
R = RADIUS

20. What kind of line is ? C
NOTE:
DIA. = DIAMETER
R = RADIUS

21. Determine the overall length of the Plate from left to right.
NOTE:
DIA. = DIAMETER
R = RADIUS

22. Determine the overall height of the Plate from top to bottom.
NOTE:
DIA. = DIAMETER
R = RADIUS

23. Give the center distance between the two upper holes.
NOTE:
DIA. = DIAMETER
R = RADIUS

24. D
Determine distance
NOTE:
DIA. = DIAMETER
R = RADIUS

25. F
What kind of line is ?
NOTE:
DIA. = DIAMETER
R = RADIUS

26. What radius forms the rounded corner of the Plate?
NOTE:
DIA. = DIAMETER
R = RADIUS

27. Name the materials specified for the Plate.
NOTE:
DIA. = DIAMETER
R = RADIUS

28. How many Corner Plates are required?
NOTE:
DIA. = DIAMETER
R = RADIUS