Response to the following:
Redesign the box-beam of Example to make better use of the material; i.e., changing the geometry of the cross-section in such a way that the serviceability (deflection) requirement is met without overdimensioning for strength as much as it is done. Perform the new design for a reliability of 99.5% assuming the load and strength variability are represented by Cσ = 0.2, CF = 0.3.
Example : Design a box section to be used as a cantilever beam of length L = 2 m subject to a tip load P = 1000 N. Limit the tip deflection δ to 1/300 of the span L of the beam.