Why does RCDC give me more rebar than Necessary

Hello,

I guess this has been done considering detailing criteria. If you go to Settings> Preferred bar spacing you can see the minimum spacing criteria mentioned. For 230mm width by default 3 nos of rebars are set. If that is the case, program will place 3 rebars in the bottom layer and try to place additional required rebars in 2nd layer. Now as bottom layer is having 3, for symmetry it provides at least 2 at 2nd layer though the requirement is 1. You can make it 4 in preferred rebar spacing settings and then try. If using 4 the spacing become too less, the program may not allow. In that case you may change the clear cover from general design settings to accommodate 4 rebars in a single line. Hope this helps.

If you still not satisfied please share the file with us.

Hello,

I guess this has been done considering detailing criteria. If you go to Settings> Preferred bar spacing you can see the minimum spacing criteria mentioned. For 230mm width by default 3 nos of rebars are set. If that is the case, program will place 3 rebars in the bottom layer and try to place additional required rebars in 2nd layer. Now as bottom layer is having 3, for symmetry it provides at least 2 at 2nd layer though the requirement is 1. You can make it 4 in preferred rebar spacing settings and then try. If using 4 the spacing become too less, the program may not allow. In that case you may change the clear cover from general design settings to accommodate 4 rebars in a single line. Hope this helps.

If you still not satisfied please share the file with us.

Do you have any idea why the concrete design module  was removed from update 4 ? 

Hi

RCDC is now available in STAAD.pro with limited features. in STAAD. pro advance you will get all features of RCDC. click on below link

RCDC /cfs-file/__key/communityserver-discussions-components-files/5932/RCDC-features-for-STAAD.pro-_2800_Basic_2900_-license-users.pdf

As RCDC basic version is available to design column, walls and beams, Concrete design module is removed.  In RCDC user will get more options to design these elements.

I prefer the calculation sheet from the concrete design module to that of rcdc 

Hi

Detailed design calculation sheet is available in RCDC. please go to reports tab and generate it.

i would request you to share STAAD and RCDC file to provide you more clarity in design. There are lot of options for design and detailing of reinforcement in RCDC. You can cross check the required steel in RCDC with your hand calculations.

validations sheet for IS and ACI codes are available in below link,

IS code Validation sheets

https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/47981/is-456--2000-is-13920-2016_5f00_design-validation-documents

ACI -M Validation sheets

https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/47574/aci_5f00_318m_5f00_validation-sheets