Question

What is the net area for the plate 100 x 8 mm bolted  with a single bolt of 20mm diameter in case of drilled hole ?

(a) 624 mm^2

(b) 756 mm^2

(c) 800 mm^2

(d) 640 mm^2

I have been asked this question during a job interview.

I'd like to ask this question from Design of Tension Members in portion Design of Tension Members of Design of Steel Structures

Answer 1

Right choice is (d) 640 mm^2

The explanation is: In case of drilled hole, dh = 20mm

Net Area An = Ag – dht = 100 x 8 – 20 x 8 = 640mm^2.