Part 1-Section 1 Lines

Unit 4 Extension Lines And Dimension Lines

• Extension Lines– Used in dimensioning to show size

– Thin, dark, solid lines

– Extend away from object

Example Application

• Dimension Lines– Size descriptions

• Fractional

• Decimal

• Metric

• Dimension Lines– Thin lines

– Broken at dimension

– Ends in arrowheads

• Dimension Lines– Arrow size determined by

• Dimension line thickness• Drawing size

– Prefer closed arrowhead

– Projects 1/16 beyond dimension line

Angle Brace (BP-4A)

Print Reading Assignment-Unit 4

1. Name the material specified for the Angle Brace.

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

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

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

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

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

7. What kind of lines are and ?D E

8. What kind of lines are and ?F G

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

Corner Plate (BP-4B)

Print Reading Assignment-Unit 4

1. What kind of line is ?A

NOTE:

DIA. = DIAMETER

R = RADIUS

2. What kind of line is ?B

NOTE:

DIA. = DIAMETER

R = RADIUS

3. What kind of line is ?C

NOTE:

DIA. = DIAMETER

R = RADIUS

4. Determine the overall length of the Plate from left to right.

NOTE:

DIA. = DIAMETER

R = RADIUS

5. Determine the overall height of the Plate from top to bottom.

NOTE:

DIA. = DIAMETER

R = RADIUS

6. Give the center distance between the two upper holes.

NOTE:

DIA. = DIAMETER

R = RADIUS

7. Determine distance .D

NOTE:

DIA. = DIAMETER

R = RADIUS

9. What kind of line is ?F

NOTE:

DIA. = DIAMETER

R = RADIUS

10. What radius forms the rounded corner of the Plate?

NOTE:

DIA. = DIAMETER

R = RADIUS

11. Name the materials specified for the Plate.

NOTE:

DIA. = DIAMETER

R = RADIUS

12. How many Corner Plates are required?

NOTE:

DIA. = DIAMETER

R = RADIUS