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4.5.3 SCREW JOINT
The thickness of an overhead joining part and parameters of a screw are input data for the
drawing of a screw joint. At the structural drawing of a screw joint (fig. 4.24, а, b, c) it is necessary
to draw all structural elements of parts. The sizes of a thread, length of a screw and sizes of a base
surface under a head fill in. A slot under a screwdriver is disposed under the corner 45° at the view
from the face head. On the simplified drawing of a screw joint (fig. 4.24, d, e, f) the sizes of a
thread and a length of a screw are marked. A slot under a screwdriver is represented an incrassate
contour line. The thread opening under a screw is drawn like an opening under a stud.
а) b) c) d) e) f)
Figure 4.24 – The screw joint
The parameters of a base surface under a head of screw are regulated by State Standard
12876:2008.
4.5.4 CONVENTIONAL DRAWING OF FIXINGS AND JOINTS
The conventional drawing of fixings (table 4.11) is regulated by State Standard 2.315:2008.
Fixings for which on a drawing the diameter of a bar is equal 2 mm or less is shown
conventionally. Conventional drawing and its sizes must give exhaustive and necessary information
about the view of a joint and its components.
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