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Section Views in Engineering Drawings

Learn about different types of section views in mechanical and aerospace engineering, including full, offset, half, and broken views. Discover the importance of hatch lines and ANSI standard section lines.

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Section Views in Engineering Drawings

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  1. Section Views Orthographic views showing all hidden lines may not be clear enough to describe an object’s internal details. This shortcoming can be overcome by imagining that part of the object has been cut away and shown in a cross-sectional view. This view is called a section view. Mechanical and Aerospace Engineering Dept., SJSU

  2. Type of Section Views • Full section view • Offset section view (multiple offset views) • Half section view • Broken section view • Aligned and Revolved section views • Removed view Mechanical and Aerospace Engineering Dept., SJSU

  3. Section View – Full Section Mechanical and Aerospace Engineering Dept., SJSU

  4. Section View – Offset Section Offset cutting plane Mechanical and Aerospace Engineering Dept., SJSU

  5. Section View – Multiple Offset Sections Mechanical and Aerospace Engineering Dept., SJSU

  6. Section View – Half Section Mechanical and Aerospace Engineering Dept., SJSU

  7. Section View – Broken Section Mechanical and Aerospace Engineering Dept., SJSU

  8. Section View – Aligned & Revolved Section Mechanical and Aerospace Engineering Dept., SJSU

  9. Hatch lines Section View Removed sections placed outside of the view Mechanical and Aerospace Engineering Dept., SJSU

  10. Section View – review • All visible edges and contours behind the cutting plane should be shown. • Hidden lines should be omitted in section views. • A section view should always be bounded by a visible outline. • There should be no lines in the hatched area. • Section lines should be in the same direction. • Use standard section lines (hatch) to show materials. Mechanical and Aerospace Engineering Dept., SJSU

  11. Breaks and Sectioning Mechanical and Aerospace Engineering Dept., SJSU

  12. ANSI Standard Section Lines for Various Materials ANSI-31 ANSI-133 American National Standards Institute ANSI-134 Mechanical and Aerospace Engineering Dept., SJSU

  13. Architectural Drawing Crosshatching patterns for various building materials that go into the construction of foundation, roof details, or wall sections. Mechanical and Aerospace Engineering Dept., SJSU

  14. AutoCAD Crosshatching Mechanical and Aerospace Engineering Dept., SJSU

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