Hi
I am designing a simple bolted steel connection. I have three forces Fx-Axial force along the beam, Fy Upward direction, Fz in Horizontal direction.I am using double cleat angle to connect UB to UB. thre is huge Fx force in the beam. I don't know how to transfer this force into supporting beam, as I can get resultant of Fy and Fz and check the shear capacity of bolt group, but don't know how to account the Fx on bolt group.

Provide a sketch showing the structural arrangement and the forces applied.

BA

Hi
Thanks for your reply please find the sketch in attachment. I have big forces in all three direction.

• http://files.engineering.com/getfile.aspx?folder=cbab802b-d6d3-46d3-8444-76

Please find the sketch for some reason the above is not working.

Thanks

• http://files.engineering.com/getfile.aspx?folder=5fd124b2-9fc9-4ec0-970f-ac

Fy and Fz produce shear in the bolts, so as you said you can determine the resultant and calculate the shear on each bolt.

It is not clear how you can have a huge Fx force, but if you do, it creates tension in the bolts and bending in the outstanding legs of the angles as well as bending in the web of the supporting beam.

Considering all three forces together, the bolts are stressed in combined shear and tension. Your code should provide a way to deal with that situation. In CSA S16-01, the subject of "Bolts in Combined Shear and Tension" is addressed in Article 13.12.1.3.

How does the supporting beam resist the "huge Fx force"?

BA

If forces are large enough the proposed conection may not be appropriate due to bending/prying in angles/bolts. May be better with stiffener plate in the web of the main beam with single shear bolts to beam.

Like BA said how will the main beam resist the Fx force?

Hi Thanks for your reply. There is wind force which transfers as Fx in supported beam. How to check the bolt group of supported beam for this Fx. I can check the supporting beam bolt group for combined shear and tension, but don't know how to check the supported beam's bolt group. Also how to check the angle clear for these forces.

Thanks & Regards