Angle Iron Capacity - Hanging Crane

[MMM36]

i have an angle iron spec'd out to bridge between two roof joists to mount a crane to (threaded rod through bolted into angle iron flange) - based off L/360 & L/240 deflection requirements i have landed around a L6x4x5/8" angle spanning the joists (5'-8" OC). the hanger load is centered and 1852 lbs, can meeting deflection control this spec'd angle or do i need to check flexural of the flange / how do i do that

 

[JAE]

The flexural strength of the angle certainly must be checked with due regard for the eccentricity of the load (your hanger may not align with the centroid of the angle shape).

Your local, applicable, steel code/spec should describe the checks and process for doing this.

 

[ETX]

AISC Steel Construction Manual, 16th edition. Page 16.1-68

 

[MMM36]

I would like to see an example of this calc - does someone have one somewhere?

 

[ETX]

AISC Design Examples v15.0

 

[EdStainless]

I would stay away from angle since the loading will not be symmetrical and result in twisting.

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P.E. Metallurgy, consulting work welcomed

 

[structSU10]

You mention it is a crane - make sure you amplify loads appropriately for its capacity. I also hope the joists are wide flange sections and not bar joists.

 

[XR250]

I don't think deflection is going to be your limiting case.
Tube steel with a hole may be a better option

 

[milkshakelake]

Flexure around geometric axis might fail (not principal axis)