Aluminium Design and Construction John Dwight

Table 11.1 Limiting design stresses for selected fastener materials
maximum possible joint stiffness is needed, the designer can resort to
friction-grip bolting (Section 11.2).
11.1.2 Basic checking procedure
Possible loading cases are: (a) joints in shear (bolted or riveted); and (b)
joints in tension (bolts only). For either of these cases, the basic procedure
for checking the limit state of static strength is as follows:
1. Find the greatest transmitted force P – arising in any one fastener in
the group (shear or tension) when factored loading acts on the structure.
2. Obtain the calculated resistance P – c for a single fastener of the type
used (shear or tension as relevant).
3. The design is satisfactory if:
(11.1)
� where m is the material factor, which BS.8118 normally takes equal
to 1.2 for mechanical joints.
The determination of the fastener force arising (1) follows steel practice
and is usually straightforward. The resistance (2) may be obtained using
Section 11.1.4 or 11.1.7, although a problem arises here in deciding on
a value for the limiting stress, In earlier chapters, we have advocated
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