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Sectioning in drawing

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CHAPTER FOUR
SECTIONING

, 4.1 Introduction
What is Sectioning?
■ Imaginary cut made through an object to
expose its interior.
■ Sectioning can be applied to expose the
internal details of a selected area of an
object.
■ Sectioning is useful for hollow or partly
hollow components.
■ Sectioning gives a Sectional view.

ME101 ENGINEERING DRAWING CHAPTER FOUR: SECTIONING 2025/2026

, 4.2 Principle of Sectioning
Sectioning
Plane

Direction of
viewing
Saw initial position

Observer

The object is imagined as being sawn
Saw final position
through and the part between the saw
ME101 ENGINEERING DRAWING
and the observer taken away.
CHAPTER FOUR: SECTIONING 2025/2026

, 4.2 Principle of Sectioning
Hatches

Sectioning
Plane

Presentation of sectional view

Hatches are added to differentiate portion with
material from portion of a component that is
hollow along the sectioning plane

The profile of the cut plane on the remaining part
is then drawn to give a sectional view.
ME101 ENGINEERING DRAWING CHAPTER FOUR: SECTIONING 2025/2026

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Institution: University of dar es salaam
Course: BSCPE (BSPE)

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Number of pages: 65
Written in: 2024/2025
Type: Class notes
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