So confused with slab design 3

[cityboy]

Hi, I am doing slab design. I have a #4@12" mat for bottom reinforcement and no mat for top. If i follow the SAFE output, I will have no rebar for some stress lines. Qell, some senior engineers in my office said that i should provide rebar to cover every stress line for my slab. However, some senior engineers told me i didn't need to do that, just put rebar wherever needed and i also see some drawings which don't have rebar to cover every stress line in this office. I tried to find some info in the ACI 05 code, but couldn't find anything related to that. I am so confused now.

 

[JAE]

cityboy - I didn't say that you need rebar if the analysis shows no reinforcing is required.

If there is no negative moment at a section, then top steel is not required...consistent with what StructuralEIT stated.

If there IS negative moment, then you need some level of rebar - either that calculated or the minimum amount as required by ACI section 10.5.

 

[JrStructuralEng]

i think everyone is on the same page here, i agree