regulations cnr 10021 and 10011

[krissbetarr]

Good morning.

I was asking for some clarification on the verification of a wagon. I read the regulations and I have some doubts. within the cnr 10021/85, which I can still be widely used at least for preliminary calculations, are explained forces, load conditions and road checks with other load conditions. the question that arises spontaneously is: what do I do with load conditions explained in point 4 of the standard? the question arises because in load conditions horizontal forces and vertical forces are joined, perhaps with the addition of the coefficient m, but if I have to verify the arrow what I do with these conditions? Should I not use vertical and horizontal loads separately? How do I apply them in practice? is there someone who does this, perhaps in a profession, who can sum up the concepts a little? thanks many in advance

 

[abelli12]

If I don't take care of wagons, as you rightly say, the rules you mentioned are no longer in force.
It is now necessary to refer to Eurocodes (in 1991-5 and 1993-6) together with ISO 8686 and 13001. However, usually in all norms (even those "old") are reported, for the different load conditions, the checks to be carried out.

 

[meccanicamg]

The old rules, written 20/30 years ago, were also well explained. in your case all the explanations found in the old norm. If you work with the new norm, forget the old, make a good excel as serious designers do and you solved. I have recently been in the hands of the spreadsheets in excels that have more than 15 years of a company that produced very heavy loads...so in our times both of the gun if we do not use a calculation scheme for the whole machine. It is also true that in the cellar there are still unfortunately that they were not eliminated after the last crisis...

 

[meccanicamg]

the same problem you will have on welds and bolts because you can no longer use cnr 10011 that has been withdrawn but you have to use and iso 1993-1-8 e and iso 1993-1-9. So summarizing, the eurocode 3 does it as masters in civil and industrial design.

 

[krissbetarr]

the same problem you will have on welds and bolts because you can no longer use cnr 10011 that has been withdrawn but you have to use and iso 1993-1-8 e and iso 1993-1-9. So summarizing, the eurocode 3 does it as masters in civil and industrial design.

I agree. But I was interested in knowing how to do it for a matter of personal culture. I have not understood how to rise from the load condition I mentioned (from which then newtons will come) to the tensions, which I would then go to compare with the maximum admissible one. With newtons, I'd be divided into the area of the section to get some pipes, but they're thought-out. in the norm is not said this, so I do not know how to do it or not. Do you know anything more?

 

[meccanicamg]

but are you sure you have a hand the complete norm? Usually if there are tax checks are described and explained all the formulas and the used sigles. It seems strange to me that you cannot understand from the norm how the verification system works.

 

[meccanicamg]

the norm uni cnr 10021/85 speaks of arrow of the road and not of the carpentry of the crane. then leave the designer free. then on a practical level it is done with cart at the center and 110% of the maximum load an arrow below l/750. but no rule has prescribed it, except the common sense of the practice of the builders of those years.