Lifting Lug With Angular Load

[dengmech]

I'm looking for some material that goes over lifting lug calculations. I have ASME BTH-1, although the material only covers if the load is perpendicular to the radius of the lug. My application has the load applied at an angle between 0 deg and 90 deg (covered in ASME BTH-1).

Can anyone point me to some good reference on this.

I've added a sketch to show my application. Just a bit of variation from the ASME BTH-1 analysis.

 

[racookpe1978]

Bob's Rigging and Crane Handbook, Pellow Engineering Svcs. 7th edition is latest I believe.

 

[dhengr]

Dengmech:
Good references to start with might be your old Engineering Mechanics, Strength of Materials or Machine Design Text books and then a good book on welding design might help too. Then, reread your verbal description and imagine how many possible sketches could be drawn which would generally fit your description. Remember, we can’t see it from here, so if you want people to really understand what you are talking about you might furnish a well proportioned sketch with some sizes, thicknesses, dimensions, loads, etc. Draw a few free body diagrams of the detail and show them too, so we know how you are approaching the problem. The codes and standards are not intended to cover every imaginable detail in the universe. Sometimes good sound engineering knowledge and judgement must be brought into play.

 

[boo1]

Omer Blodgett, "Design of Welded Structures", 1966
out of plane lug loads

 

[dvd]

Not sure what you are doing - designing the lug, or analyzing the load, but it seems to me that you should not bend a lug. Can you use a swivel hoist ring?

 

[racookpe1978]

dvd: The restrictions and reduced loading allowed on different kinds of lifting lugs at various angles of the rope are what is described in the rigging book I listed above.

You're showing one of the best options, but even it has restrictions at certain angles.

 

[dvd]

racookpe - "not bend a lug" was too strongly worded. I would certainly avoid it, though.