Maxweight / maxaxleload

I’ve got some questions on how to tag maxweight concerning a combination of vehicles? According to Finnish Transport Agency there are different traffic signs for both non combined and combined vehicle maxweights. Traffic sign #344 is used for maxweight of non combined vehicles and #345 for combined vehicles. Should I just tag with maxweight=nn in both cases? Or could the latter be tagged with maxweight:combined_vehicle=nn?

And how should maxaxleload be tagged concerning maxload for bogies (“tandem axles”), sign #347? Maxaxleload:bogie=nn or maxaxleload:tandem_axel=nn ?