Strength of pinned connection
Strength of pinned connection
(OP)
Looking for guidance on how to calculate the strength of say a lifting lug and a shackle. Assume 3/4" plate with a 13/16 hole one diameter from the edge. How do you calculate the "pull out" strength of the lug, is it the projected are of the pin. Hope this is not confusing, I am a mechanical engineer not structural.
Regards
Regards






RE: Strength of pinned connection
RE: Strength of pinned connection
RE: Strength of pinned connection
RE: Strength of pinned connection
RE: Strength of pinned connection
0.70*Fu/(1.20*Nd)*A
where Fu is the ultimate tensile strength of the steel and Nd is the design factor
The design factor is determined by the Design Category of the lug, which is based on a service class, which is based on the number of load cycles.
In addition to that, there's still 4 other failure modes that need to be checked for the pinned connection.
My recommendation is to get a copy of the BTH-1 and become familiar with it, especially if you're going to be designing these lugs on a consistent basis.
RE: Strength of pinned connection