CS 23.2230 Limit and ultimate loads

(a)Unless special or other factors of safety are necessary to meet the requirements of this Subpart, the applicant must determine:

(1)the limit loads, which are equal to the structural design loads; and

(2)the ultimate loads, which are equal to the limit loads multiplied by a 1.5 factor of safety, unless otherwise provided.

(b)Some strength specifications are specified in terms of ultimate loads only, when permanent detrimental deformation is acceptable.