§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 Sec. 25.785(f)(3) applies.]