Hot Rolled Shear UC in RISA-3D v.10 1

[MyGrover]

I am having trouble with the shear check results being given by RISA-3D. I have a W8x35 that has a max Vy of 10.229 k and a max Vz of 9.068 k. The program lists the capacities as phi*Vny = 75.516 k and phi*Vnz = 214.375 k, respecively. However, it shows the max shear check as 0.931 , even though my forces appear to be nowhere near there. Furthermore, when I looked through the user reference, I found that it states the shear UC check is "based on the shear provisions of chapter F." In AISC 360, the shear provisions are contained in chapter G. The model uses AISC 14th (360-10) LRFD. Should I ignore the RISA shear check?

 

[JoshPlumSE]

I wouldn't worry too much about that code reference shown in the manual. It's probably just left over from the previous version. We'll have to track that down and update per the new 14th edition.

Since you didn't post your model, I cannot say this with certainty. But, most of the time these shear check questions are related to the shear caused by torsion. Take a look at the Member torsion spreadsheet. You'll see some torsional shear stresses develop in the member due to this torque. RISA converts this into an equivalent flexural shear force and includes it in the shear code check.