1. Architect’s Scale

2. Standard
Students will demonstrate the ability to read and draw using the proper scale.

3. Never, Never Rules
Never draw a line using the edge of the scale
Never mark on the scale
Never hit the scale on anything
Never touch the compass to the scale

4. Full Size – 16 Side of the Architect’s Scale
2” = 2”
Every line equals 1/16”
Start by finding the whole number on the scale and then find the fraction

5. Full Size Practice - measuring lines full size1 2 3 4

6. Half Size – 16 Side of the Architect’s Scale
Can this drawing be created full size if typical paper is 8-1/2” x 11”?

7. Half Size – 16 Side of the Architect’s Scale
Measure/Multiply: When measuring a line, double the measurement you find to get the actual dimension
Half Size – 16 Side of the Architect’s Scale

8. Half Size – 16 Side of the Architect’s Scale
Measure/Multiply: When measuring a line, double the measurement you find to get the actual dimension
4 ¾ = 8 3/2 = 9 ½
Leave
Double
÷ 2
It does not matter if the whole number is even or odd!! You multiply x 2 the same way for all mixed numbers!!

9. Half Size – 16 Side of the Architect’s Scale
Measure/Multiply: When measuring a line, double the measurement you find to get the actual dimension
Measurement
Actual Dimension X2
1-1/2”
2-3/4”
6-7/8”

10. Half Size – 16 Side of the Architect’s Scale
Measure/Multiply: When measuring a line, double the measurement you find to get the actual dimension
Measurement
Actual Dimension X2
1-1/2” 3”
2-3/4”
5-1/2”
6-7/8”
13-3/4”

11. Practice problems for measuring a line half size – multiply by 2
1) 3-3/4 x 2 =
7-1/2
2) 5-1/2 x 2 = 11
3) 4-5/8 x 2 =
9-1/4
4) 6-1/4 x 2 =
12-1/2
5) 7-3/8 x 2 =
14-3/4

12. Half Size – 16 Side of the Architect’s Scale
Draw/Divide: When marking/drawing a line, divide the actual dimension by 2 before you draw
Half Size – 16 Side of the Architect’s Scale

13. Half Size – 16 Side of the Architect’s Scale
Draw/Divide: When marking/drawing a line, divide the actual dimension by 2 before you draw
Half Size – 16 Side of the Architect’s Scale

14. Half Size – 16 Side of the Architect’s Scale
Draw/Divide: When marking/drawing a line, divide the actual dimension by 2 before you draw
Actual Dimension
Length of Line you Draw ÷2
1-1/2”
2-3/4”
6-7/8”

15. Half Size – 16 Side of the Architect’s Scale
Draw/Divide: When marking/drawing a line, divide the actual dimension by 2 before you draw
Actual Dimension
Length of Line you Draw ÷2
1-1/2”
3/4”
2-3/4”
1-3/8”
6-7/8”
3-7/16”

16. Practice problems for drawing a line half size – divide by 2
1) 5-3/4 ÷ 2 =
2-7/8
2) 3-1/16 ÷ 2 =
1-17/32
3) 2-1/2 ÷ 2 =
1-1/4
4) 4-7/8 ÷ 2 =
2-7/16
5) 7-1/4 ÷ 2 =
3-5/8
6) 9-3/8 ÷ 2 =
4-11/16

17. Half Size Practice - measuring lines half size1 2 3 4

18. Fraction Tips for Half Size Measurements
Multiplication of Mixed Numbers by Two (4-5/8 x 2): Multiply whole number by two, leave the numerator, divide the denominator by two – SIMPLIFY if needed
Division of Fractions by Two (3/4 ÷ 2): Leave the numerator and double the denominator
Division of Mixed Numbers by Two when the Whole Number is EVEN (2-7/8÷2): Divide the whole number by two, then leave the numerator and double the denominator
Division of Mixed Numbers by Two when the Whole Number is ODD (3-1/2÷2): Divide the whole number by two and write down only the whole number, add the numerator and the denominator to get new numerator, then double the denominator

19. Architect’s scale Sheet 1 – full size
Helpful hints:
Measure from the outside edge of right line to outside edge of left line
Name, date and seat number – should be LETTERED

20. Architect’s scale Sheet 2 – full size
Name, date and class period – should be LETTERED
Label each tick mark (1/16, 1/8, 3/16, etc.)

21. Architect’s scale Sheet 3 – half size
Measure the line and then multiply the distance by 2 and record answer
MEASURE - MULTIPLY
Divide the distance by 2 before drawing a tick mark and make a mark that distance
DRAW - DIVIDE

22. Architect’s scale Sheet 4 – half size
DRAW - DIVIDE
Divide the distance by 2 before drawing a tick mark and make a mark that distance

23. Test Review – 4 never, never rules
Never draw a line using the edge of the scale
Never mark on the scale
Never hit the scale on anything
Never touch the compass to the scale

24. Test Review – Length of shaded box – FULL SIZE
7-5/8
8-3/16

25. Test Review – Draw lines based on a measurement – FULL SIZE
3-7/8
1-5/16

26. Test Review – measure lines and record length – FULL SIZE
3-1/4
13/16

27. Test Review – Draw lines based on a measurement – half SIZE draw - divide
4-7/8
3-3/4
4-7/8 ÷ 2 = 2-7/16
3-3/4 ÷ 2 = 1-7/8

28. Test Review – measure lines and record length – half SIZE Measure - multiply
5-7/8
2-1/4
2-15/16 x 2 = 4-15/8 = 5-7/8
1-1/8 x 2 = 2-1/4

29. Test
If, when measuring, the end falls in between two numbers, pick the one it is closest to – I WILL ACCEPT BOTH ANSWERS
When done with the test, turn it in and work on your homework for next week.