design and default

[M_free]

Good evening to all!:biggrin:
for the examination of constructions of machines I have to design a flag crane.
I started looking for some regulations:
-uni iso 4301 defines me the class of the appliance
-cnr 10021 should help me for calculations (I am not in possession)
- and the famous Eurocode 3 in particular the section concerning fatigue.

Now to start the project I thought I was moving in this direction: classification of the device, and therefore definition of the number of cycles and of the load spectrum, sizing with the classical rules (diagrams> more solicited >tensions) and therefore use of the eurocode for the fatigue dimensionalization of the construction details (in particular the welding). is correct?

My whole question is of a general nature, that is an engineer who has to design something compulsory needs the legislation relating to what he plans or not?so in the specific case I need the cnr 10021?

I hope I have explained to you my question and at the same time clarify it to me, since I have a bit of confusion about the use of the rules...

Thank you so much!

 

[meccanicamg]

Good evening to all!:biggrin:
for the examination of constructions of machines I have to design a flag crane.
I started looking for some regulations:
-uni iso 4301 defines me the class of the appliance
-cnr 10021 should help me for calculations (I am not in possession)
- and the famous Eurocode 3 in particular the section concerning fatigue.

Now to start the project I thought I was moving in this direction: classification of the device, and therefore definition of the number of cycles and of the load spectrum, sizing with the classical rules (diagrams> more solicited >tensions) and therefore use of the eurocode for the fatigue dimensionalization of the construction details (in particular the welding). is correct?

My whole question is of a general nature, that is an engineer who has to design something compulsory needs the legislation relating to what he plans or not?so in the specific case I need the cnr 10021?

I hope I have explained to you my question and at the same time clarify it to me, since I have a bit of confusion about the use of the rules...

Thank you so much!

in fact there are already open posts for the design of a flag crane and it has been mentioned already.
the rules to follow are:
- cnr 10021/85 steel structures for lifting equipment
- uni 7670 for mechanisms
- cnrunii 10011 for the calculation of steel structures - replaced by Eurocode 3 uni iso 1993 (welding and bolting, static and dynamic, verification of metal frames, welding, nailing, static/last analysis before breaking and fatigue)
- Machinery Directive 2006/42/cein general, the design is divided into two classes:
1) all that has a specific legislation: this is used by force of things all the specific regulations of industry. are all those standard activities that turn back billions of times all over the world and so it is so that you are based on security etc etc.
2) all that is experimental or has no specific cases: we talk about everything that does not fall into industry regulations and therefore we seek regulations to apply to make specific dimensions. For example, I have to dimension a very special machine for which there is no legislation except for the machinery directive. had it if it has welded structural components that must resist I will use eurocode 3 to make verification