Prying Action 1

[StructuralAddict]

Hi,

Could someone please explain to me what's the difference between tnp, tmin and tc related to Prying Action in PArt 9 of AISC Steel Construction Manual (15th Edition). I know that tnp is the thickness that will prevent prying action effects from happening; however, what about tmin and tc?

Thank you.

 

[271828]

tc is the thickness "required to develop the available strength of the bolt, Bc, with no prying action." Instead of the "demand" being Tu like in tnp, it's the bolt strength, Bc.

tmin is the required thickness if there will be prying action.

The Companion to the AISC Steel Construction Manual, Volume 1, v15.1 Example II.D-1 shows tmin and tnp being used.

 

[StructuralAddict]

Thank you this is very helpful.