I wasn't sure. I'm not a Reg fan and have only had a cursory look at pics of the Blade Regs.

Out of curiosity, how does a 90 degree edge induce additional stress? When calculating moment and shear in beams with 90 degree sectional properties no additional stress is measurable due to the perpendicular nature. The stresses are found were we'd expect to see them (parabolic increases at midspan, etc).

Just wondering why bar stock behaves differently.

JYD #123 The great one formerly known as Architect.

I am now a fictional British television police officer (currently a Detective Sgt) at Thames Valley Station. My governor is Detective Inspector Fred Thursday and it’s 1969.