David Connor's Bridge Book Question

[pkarna77]

David's book is the best for SE preparation for bridge section.

David, could you please shed light on Problem#17(Page-61): how you have calculated Avf=4*0.2=0.8 in^2/ft?

 

[leggo PE]

@David Connor, SE, could you help @pkarna77 out here?

 

[David Connor SE]

The interface bars are (2)-#4 bars spaced at 6" o.c.  The area of reinforcement per linear ft is (4) bars per ft. with 0.2 sq. inches per bar.  Therefore, Avf = 0.8 sq in.