Need help customizing load combinations in Excel

[r.farnham]

I've searched the forums a bit and can't find good answers, so I hope someone might be able to help.

I've had a hard time getting automatic combinations to work (and it seems others have as well), so I'd like to be able to just write my own in Excel and copy them into Robot.  I'm confused about the formatting.  Following suggestions in some of the discussions here, I used the manual combo generation tool to create a few basic combos that I could copy/paste to Excel so I could get the format right.  The images below show how that went:

Load Types and "Values" tab of Combinations Table:

Load Combinations Table, "Edit" tab"

I understand that I can copy the fields of the "Edit" tab into Excel, edit the factors, and paste back in Robot.  What doesn't make sense is that it appears not all of the loads have a coefficient applied in the table, but they end up factored in the combination.

For example, Combination "5 (C)" is 1.4*DL1, but in the "Edit" tab, there is NOT a 1.4 coefficient next to the case in that row.  How does the program know that the dead load needs a 1.4 factor applied?

In the next combo ("6 "C"), the dead load now has the correct 1.2 factor, but the live load (LL1, case 2) does not have the 1.6 factor that it ends up with in the combination.

How do I format my combos so they come into Robot correctly?

Thanks in advance!

-Rich

[StefanoPasquini6790 · Accepted solution]

Hi @r.farnham 

Do you install the Hotfix for Robot 2022? It fix exactly this issue.

try to install it and then post on forum if you solved your issue or you need to receive other support.

Good luck

[r.farnham]

That fixed it, thanks!  I wish it had also made the automatic load combos behave better, but that probably deserves it's own thread.

Thanks again!