IET 222 COMMERCIAL ARCHITECTURE DESIGN

1
Reading Measuring Tools
Unit Two
2
UNIT 2Reading Measuring Tools
Page 19
Learning Objectives

• Read in both English Metric rules tapes
• Convert between English Metric units

3
Fractional Rule
UNIT 2 page 19 - 20

• major divisions
• feet
• inches
• fractions
• 1/2 2 per inch
• 1/4 4 per inch
• 1/8 8 per inch
• 1/16 16 per inch (usually the smallest
  division needed)

4
Fractional Rule
1 - 0 5/16
7 1/2
8 5/8
5
Reading Fractional Rule
UNIT 2 page 20

• take 5 minutes to complete the measurements A
  thru H in Activity 2-1 on page 20

6
Metric Rule
UNIT 2 page 20

• basic unit - meter
• millimeter mm 1/1000 m
• centimeter cm 1/100 m
• kilometer km 1000 m

7
Metric Rule
20mm
38mm
115 mm
11.5 cm
8
Conversion of UnitsEnglish to Metric
UNIT 2 page 20
1 inch 12 inches 1 yard ( 36 inches ) 39.37 inches
25.4 millimeters 304.8 millimeters 914.4
millimeters 1000 millimeters
9
Example Conversion
UNIT 2 page 20

• convert 14 inches to millimeters

solution multiply 25.4 x 14 355.6 mm
10
Example Conversion
UNIT 2 page 21

• convert 11-5 to metric

solution (11 x 12) 5 137 137 x 25.4
3479.8 mm 3479.8 mm 3.48m 1000
11
Example Conversion
UNIT 2 page 21

• convert 225 mm to inches

solution 225 25.4 8.86 or 8 7/8
12
Example Conversion
UNIT 2 page 21

• convert 23.45 m to customary units

solution 23.45 m 23,450 mm 23,450 mm 25.4
923.23 912 76-11.23 or 76-11
1/4 (nearest 1/8)
13
UNIT 2
Reading a Metric Rule
take 10 minutes to complete Activity 2-2 page 21
test your knowledge on page 22
Test Your Knowledge
END OF UNIT 2