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# bearing capacity of pinned(frictionless) joints in AISC?3

## bearing capacity of pinned(frictionless) joints in AISC?

(OP)
Pals

I can not find bearing capacity of a pinned connection in AISC code. By "pinned" here I mean a single theoretically frictionless pin, usually attached to one main plate and two fork plates.

I can find bearing capacity calculations for bolts and threaded parts, but not for pins. Dimensional requirements for pins and eyebars are given in the code.

Are we expected to determine bearing capacity the same way we would do for bolts or threaded rods?

I use that line of logic, but I would like to be sure, since pins are expected to operate at lower bearing stresses.

respects
IJR

### RE: bearing capacity of pinned(frictionless) joints in AISC?

AISC 13th section D5 concerns rupture of the plates and section J7 concerns bearing strength at, among other things, pin holes.

### RE: bearing capacity of pinned(frictionless) joints in AISC?

Johnny is correct for the pin connected elements. For the pin itself check section F11 for yielding of bars. Note that the equation uses Z not S and allows for permanent deformation. If your application necessitates elastic behavior you'll need to use S instead.

### RE: bearing capacity of pinned(frictionless) joints in AISC?

Also note that Section D5 is for tight fitting pins in permanent structures - if you need to design something such as a lifting lug, you need to use ASME BTH-1-2008 "Design of Below-the-Hook Lifting Devices" which provides an emperical design methodology for such conditions.

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