Sec. 25.625 - Fitting factors.
For each fitting (a part or terminal
used to join one structural member to another), the following apply:
(a) For each fitting whose strength is
not proven by limit and ultimate load tests in which actual stress
conditions are simulated in the fitting and surrounding structures, a
fitting factor of at least 1.15 must be applied to each part of --
(1) The fitting;
(2) The means of attachment; and
(3) The bearing on the joined members.
(b) No fitting factor need be used --
(1) For joints made under approved
practices and based on comprehensive test data (such as continuous joints
in metal plating, welded joints, and scarf joints in wood); or
(2) With respect to any bearing surface
for which a larger special factor is used.
(c) For each integral fitting, the part
must be treated as a fitting up to the point at which the section
properties become typical of the member.
(d) For each seat, berth, safety belt,
and harness, the fitting factor specified in §25.785(f)(3) applies.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25-23, 35 FR 5674, Apr. 8, 1970; Amdt. 25-72, 55 FR
29776, July 20, 1990]