Matt Whiting wrote:


Cessna uses a bolt installed in shear through fittings like
you fingers meshed. This is called "double shear" and as
long as the bolt is a snug fit in the hole the bolt can hold
more load than the airplane is designed to experience.
But a bolt in tension is stronger than a bolt in shear.

I'd have to pull out my AISC manual to be sure, but I believe that a
bolt in double shear has more capacity than in tension. If you are
comparing single shear to tension, then I agree with you.

Matt

That's right. The 70% figure refers to single shear.

I made a mistake on the Grade 8 bolt head marking. It has six
radial marks, not five. Five is a Grade 7, not a common bolt. The
grades go clear to Grade 16, IIRC.

Dan