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By: Walter C. Brown and Daniel P. Dorfmueller By: Walter C. Brown and Daniel P. Dorfmueller PowerPoint By: Daniel P. Dorfmueller PowerPoint By: Daniel P. Dorfmueller Copyright 2005 by The Goodheart-Willcox Co., Inc.

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Section 2 Print Reading Basics Section 2 Print Reading Basics

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Unit 8 Reading Scales and Dimensioning Drawings Scale dimensions from a print. Read dimensions on a print. Add and subtract dimensions. Identify the items that should be dimensioned on different drawing types. Scale dimensions from a print. Read dimensions on a print. Add and subtract dimensions. Identify the items that should be dimensioned on different drawing types. Learning Objectives

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Dimension Lines Dimension and extension lines were discussed in the Lines and Symbols portion of Unit 4.

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Drawing Scale Construction projects are drawn to a reduced scale. Common scale types used Architects Scale 1/4" = 1'-0" Every 1/4" on a drawing equals 1 foot of actual length on the project. 1/8" = 1'-0" or 1 ½" = 1'-0" Engineers Scale A 10 scale means that every 1" on a drawing equals 10' in reality. Metric Scale 1:50 scale Construction projects are drawn to a reduced scale. Common scale types used Architects Scale 1/4" = 1'-0" Every 1/4" on a drawing equals 1 foot of actual length on the project. 1/8" = 1'-0" or 1 ½" = 1'-0" Engineers Scale A 10 scale means that every 1" on a drawing equals 10' in reality. Metric Scale 1:50 scale

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Types of Scales Architects Scale Engineers Scale Architects Scale 1" and 1/8" Architects Scale 1/16" and 1/32"

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Architects Scale Scale 3/32" 3/16" 1/8" 1/4" 3/8" 3/4" 1/2" 1" 1 ½" 3" 3/32" 3/16" 1/8" 1/4" 3/8" 3/4" 1/2" 1" 1 ½" 3" 2" 1" ½" ¼" " 1 / 16 " 3" 2" 1" ½" ¼" " 1 / 16 " Tick marks Smallest tick mark

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Architects Scale 2" ½" 1" " " Identify the smallest tick marks.

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Architects Scale ¼" ½" 1" 2" Identify the smallest tick marks.

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Reading an Architects Scale 1 inch 2' 4' 2 inches 2'2' 16'16'

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20'-6"20'-6" 2' - 4"4" Reading an Architects Scale

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2' - 8½" Reading an Architects Scale

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3'-8"3'-8" 5 5/8" Reading an Architects Scale

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Reading an Engineers Scale 50 feet 100 feet 10 feet 1 inch

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Reading a Metric Scale 2 meters 10 meters

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How to Scale a Line 12" in scale 0 mark 2'-10" Line up on the closest foot marking that still allows the line to trail into the fraction of a foot area. The scale is 1½" = 1'.

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How to Scale a Line 12" in scale 0 mark 8'-5½" Line up on the closest foot marking that still allows the line to trail into the fraction of a foot area. The scale is ½" = 1'.

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Engineers Scale Scales: 1" = 10' (may also be 100', 1000', or even 10,000') 1" = 20' 1" = 30' 1" = 40' 1" = 50' 1" = 60' 1" = 10' (may also be 100', 1000', or even 10,000') 1" = 20' 1" = 30' 1" = 40' 1" = 50' 1" = 60'

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How to Scale a Line Line up on the closest foot mark that still allows the line to trail into the fraction of a foot area. The scale is ¾" = 1'. Is this correct?

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How to Scale a Line 12" in scale 0 mark 6'-11½" Line up on the closest foot mark that still allows the line to trail into the fraction of a foot area. The scale is ¾" = 1'.

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How to Scale a Line with an Engineers Scale 164' The scale is 1" = 40'.

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Adding and Subtracting Dimensions Find the missing dimension. 5'-6" + 3'-1" = 8'-7" 24'-3" - 8'-7" 23'-15" - 8'-7" 15'-8" 24'-3" 5'-6" 3'-1" ? ?

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Test Your Knowledge Take 10 minutes to answer the Test Your Knowledge questions on page 108 of the text.

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Test Your Knowledge Answers 1.C. ¼" = 1'-0" 2.D. Construction standards using the metric system have not been established 3.C. 1:50 4.C. Thickness of wall 5.B. 4:12 6.False 7.False 8.True 1.C. ¼" = 1'-0" 2.D. Construction standards using the metric system have not been established 3.C. 1:50 4.C. Thickness of wall 5.B. 4:12 6.False 7.False 8.True

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Test Your Knowledge Answers 9. False 10. True 11. A. 1" B. 1" C. ¼" D. ¼" False 10. True 11. A. 1" B. 1" C. ¼" D. ¼"

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Activity 8-1 Reading Prints for Dimensions- Frame Residence Complete the questions in Activity 8-1 on page 109 using the large prints 8-1a and 8-1b. 1.17'-4" 2.6'-0" 3.69'-4" 4.26'-4" 5.4" 1.17'-4" 2.6'-0" 3.69'-4" 4.26'-4" 5.4" 6.8'-0" 7.12" 8.2'-0" 9.4'-6" '-0" 6.8'-0" 7.12" 8.2'-0" 9.4'-6" '-0"

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Activity 8-2 Reading Prints for Dimensions– Brick Residence Take 10 minutes to complete the questions in Activity 8-2 on page 110 of the text. Use large prints 8-2a and 8-2b.

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1.1/8" = 1'-0" 2.72'-0" x 36'-0" 3.30'-3", 11'-2" 4.9" 5.18" x 9" 6.8" 7.A. 24'-0" B. 16 ' -3 " C. 24 ' -10 " 8.71'-2" x 35'-2" 9.1'-10" 1.1/8" = 1'-0" 2.72'-0" x 36'-0" 3.30'-3", 11'-2" 4.9" 5.18" x 9" 6.8" 7.A. 24'-0" B. 16 ' -3 " C. 24 ' -10 " 8.71'-2" x 35'-2" 9.1'-10" 10.14'-6" x 20'-0" 11.27'-6" 12.A. 7'-7½" B. 8 ' - 1 ½" C. 8 ' - 1 ½" 13.1:12 14.A. 13 B. 7 7/8" C. 12 D. 9" 15.14'-10" 10.14'-6" x 20'-0" 11.27'-6" 12.A. 7'-7½" B. 8 ' - 1 ½" C. 8 ' - 1 ½" 13.1:12 14.A. 13 B. 7 7/8" C. 12 D. 9" 15.14'-10" Activity 8-2 Answers

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Activity 8-3 Reading and Drawing Using Scales Take 10 minutes to complete Activity 8-3 on page 112 in the text. SCALING I, Page 112 Using the Architects scale, measure the lines using the scale indicated below the line. SCALING II, Page 113 Using the Engineers scale, measure the lines using the scale indicated below the line. DIMENSIONING I, Page 114 Using an Architects scale, draw the length of the dimension, in the scale indicated, on the line provided. DIMENSIONING II, Page 115 Using an Engineers scale, draw the length of the dimension, in the scale indicated, on the line provided. Take 10 minutes to complete Activity 8-3 on page 112 in the text. SCALING I, Page 112 Using the Architects scale, measure the lines using the scale indicated below the line. SCALING II, Page 113 Using the Engineers scale, measure the lines using the scale indicated below the line. DIMENSIONING I, Page 114 Using an Architects scale, draw the length of the dimension, in the scale indicated, on the line provided. DIMENSIONING II, Page 115 Using an Engineers scale, draw the length of the dimension, in the scale indicated, on the line provided.

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Optional Activity Fill in all blank dimensions to the nearest inch. Assume all walls are 4" thick. 30 door Scale: 1/4" = 1'-0" 4-4 wide window c c L L c c L L

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Optional Activity Answers 30 door Scale: 1/4" = 1'-0" 4-4 wide window ,

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Optional Activity Handout Fill in all blank dimensions to the nearest inch. All walls are 4" thick. 30 door Scale: 1/4"= 1'-0" 4-4 wide window c c L L c c L L

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END OF UNIT 8 Its all about the scale of things! Its all about the scale of things!

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