LAP SPLICING, A or B??

[nohjzqrun]

Good Day!
I'd like to ask on which of the two, A or B, is possible and what Lap Class is this considering the part, "more/less than one half of the bars were spliced at any section"? (more: CLASS B; less: CLASS A)
I am really confused on the, "more/less than one half of the bars were spliced at any section".
Thank you for your responses!

 

[Klitor]

Both are possible.
Using scheme A would allow you to have shorter lap length since less than 50% of bars are spliced at any section
Scheme B splices 100% of bars at the same section and therefore you are penalised with longer lap lengths.

Not sure of your code, but some I used reward further if you splice less than 33% or even 25%.

 

[nohjzqrun]

Thank you, Klitor. Also, I have read the 33% part but it was for the bundled bar.

 

[TehMightyEngineer]

Essentially (A) will help the engineer keep material costs down but will add labor and introduce more chances for fabrication error. (B) will make it easier to fabricate but cost more in materials. If possible, I try to do something like below (best of both):

Note, I just noticed that I have exactly 50% of the bars spliced which wouldn't qualify for the reduction in lap length, pretend there's a 5 set of bars in that sketch.

Professional and Structural Engineer (ME, NH, MA)
American Concrete Industries

http://www.americanconcrete.com