PPI Steel Design for the Civil PE and Structural SE Exams Example 4.6

[pkarna77]

2nd Edition Example 4.6 page 4-18

Could anyone explain how the net area has been claculated? I do not see it has been multiplied by number of holes? It looks like Nholes =1 in this example?

An=Ag-Nholes*(Dbolt+0.125)*T

 

[deviationz]

The bolt hole is perpendicular to the direction of the force. It doesn't matter how many bolts you have parallel to the direction of force when you calculate net shear area. Draw a plan view of the angle. As the load travels into the angle from the plate, the first bolt hole it hits reduces the net area by (1) hole diameter.

In the case where you had 2 plates connected, with each one connected to one leg with bolts, you would be doing Ag - (2)* t *hole diameter.