20 Machine Drawing
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ABCDEFGHIJKLMN
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Fig. 2.10 Vertical lettering
2.6.1 Hatching of Sections
Hatching is generally used to show areas of sections. The simplest form of hatching is generally
adequate for the purpose, and may be continuous thin lines (type B) at a convenient angle,
preferably 45°, to the principal outlines or lines of symmetry of the sections (Fig. 2.11).
Fig. 2.11 Preferred hatching angles
Separate areas of a section of the same component shall be hatched in an identical
manner. The hatching of adjacent components shall be carried out with different directions or
spacings (Fig 2.12 a). In case of large areas, the hatching may be limited to a zone, following
the contour of the hatched area (Fig. 2.12 b).
Where sections of the same part in parallel planes are shown side by side, the hatching
shall be identical, but may be off-set along the dividing line between the sections (Fig. 2.13).
Hatching should be interrupted when it is not possible to place inscriptions outside the hatched
area (Fig. 2.14).
