Bolt failure of two bolted I-Beams
Bolt failure of two bolted I-Beams
(OP)
I have (2) 8 X 5.25 x 20 WF I-Beams that are 4.5 ft apart. I need to attach a standard 6 X 3.38 X 12.5 I-beam to the bottom of the two wide flange beams. I want to use ASTM A-193 B7 bolts and nuts which have a tensile strength of 125 ksi and a yield of 105 ksi. I would use four (4) bolts per beam. I need to be able to hang an 8000 lb load in any position along the length of the beam.
How do I figure if the bolts will be sufficient? I can look at the tensile stress area of the bolts, but what is the worst postion the load will be that will create the largest force? I'm not sure if shear is a factor either.
How do I figure if the bolts will be sufficient? I can look at the tensile stress area of the bolts, but what is the worst postion the load will be that will create the largest force? I'm not sure if shear is a factor either.





RE: Bolt failure of two bolted I-Beams
You didn't give the bolt diameter, but assuming for a structural connection, 5/8 diameter is the smallest used, your bolts will probably be OK. But you're using nomenclature for the beams that isn't standard, so I'm not sure how your connection looks or even what size the members are. There's a lot more to a connection than bolt material, number and size, so you should get some help from someone who's done this before.
RE: Bolt failure of two bolted I-Beams
RE: Bolt failure of two bolted I-Beams
If you use an S6 x 17.25, I think everything else will work out.
RE: Bolt failure of two bolted I-Beams
RE: Bolt failure of two bolted I-Beams
JWB
RE: Bolt failure of two bolted I-Beams
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: Bolt failure of two bolted I-Beams
Since you are using an S shape I assume there is a hoist(chainfall) that attaches to the S beam. OSHA has all sorts of additional requirements for the structural capacity if hoisting loads are present.
RE: Bolt failure of two bolted I-Beams
You really need to get an experienced structural engineer involved in this as I am reading very large gaps in your knowledge by what you are posting.
This forum is not a place to learn engineering fundamental nor is it a place to get professional advice.