47 Copyright Goodheart-Willcox Co., Inc. Learning Objectives After studying this unit, you will be able to: Describe drawing formats according to industry standards. Identify and define the parts of a title block. Interpret information found in a title block and its components. Understand how notes convey important information. UNIT UNIT 4 4 Key Terms application block angle of projection block CAGE code drawing number feature general notes local notes part number parts list revision revision history block revision status of sheets sheet format sheet size surface texture title block tolerance tolerance block zones Title Blocks and Notes Title Blocks and Notes The major topics covered in this unit will include drawing formats, title blocks, tolerance blocks, change blocks, parts lists, and notes. Drawing Formats Companies have standard sheet sizes and formats for the layout of their drawings. A sheet size is the size of a drawing layout presented in digital form (soft copy) or on paper (hard copy). Letters as shown in Figure 4-1 easily Goodheart-Willcox Publisher ASME standard sheet sizes for US Customary and metric drawings. Figure 4-1 Standard Sheet Sizes (US Customary) Size Code Sheet Dimensions (inches) A 8.5 × 11 B 11 × 17 C 17 × 22 D 22 × 34 E 34 × 44 Standard Sheet Sizes (Metric) Size Code Sheet Dimensions (mm) A4 210 × 297 A3 297 × 420 A2 420 × 594 A1 594 × 841 A0 841 × 1189
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