Gurudev

Execution of steel structures according to EN1090

18 posts in this topic

Hello forum,

 

I have few doubts about Execution of steel structures for CE marking.

Title of h'EN standard 1090-1 is "Requirements for conformity assessment of structural components"

Why it is not "Requirements for conformity assessment of steel or aluminium structure"?

Also Scope of 1090-1 says " this standard specifies conformity assessment of performance characteristics for structural steel and aluminium components as well as for kits placed on the market as construction products"

where, components refer to structural beams, columns and hardware etc. 

kits are set of structural components assembled and installed on site

Structure is assembled system of structural components

So what is the difference between kits and structure???

Actually we are concern with modular process skid in steel which will be fabricated and assembled at a place other than Europe except some parts which will be assembled (welded or bolted) at erection site in Europe.

So is our product a kit or structure?

Please share your views.

Thanks in advance

GSP. 

 

Share this post


Link to post
Share on other sites

Hello.

 

I haven't spent much time studying these standards but from what I understand 1090-1 is meant for conformity assessment of products (including individual beams, etc) leaving fabrication shops, but 1090-2 is meant for conformity assessment of whole structures as erected on site. 

 

Best of luck!

1 person likes this

Share this post


Link to post
Share on other sites

Thanks for your comments,

Whenever I post comment here I always expect your reply.

Regarding 1090 they cover wide range of application hence difficult to understand.

22 hours ago, ReinisGailitis said:

I understand 1090-1 is meant for conformity assessment of products (including individual beams, etc)

But they are covered under separate hEN standards eg. EN10025-1, EN14399-1 etc

Also name of 1090 is execution of steel structure.

Really confusing.

I hope kingniro will add some imp points to this discussion.

Thanks

Share this post


Link to post
Share on other sites

Hallo. 

 

EN 10025-1 is standard which defines steel grades and EN 14399-1 standard about bolts. EN 1090-1 is for products, thus, any kind of fabrications built in the shop. 

 

Cheers

1 person likes this

Share this post


Link to post
Share on other sites

Hello,

On 11/28/2017 at 4:14 AM, ReinisGailitis said:

any kind of fabrications built in the shop

So this will be called as a kit, right?

Now if some one fabricate structure (completely welded structure & to be erected on site without any addn e.g., towers for antennas) completely in shop, it will be called as a kit (since it is not yet installed on site).

And after installation on site this will be called as a structure.

Am I right?

 

Share this post


Link to post
Share on other sites

Yes, I also think that this would be the case.

 

 

Share this post


Link to post
Share on other sites

From the construction products regulation, terms and definitions:

 

Quote

1. ‘construction product’ means any product or kit which is produced and placed on the market for incorporation in a permanent manner in construction works or parts thereof and the performance of which has an effect on the performance of the construction works with respect to the basic requirements for construction works;

2. ‘kit’ means a construction product placed on the market by a single manufacturer as a set of at least two separate components that need to be put together to be incorporated in the construction works;

 

Doesn't matter if your construction is a product or kit, it needs CE marking.

 

What does matter is, is your skid a construction work.

 

Quote

3. ‘construction works’ means buildings and civil engineering works;

 

Edited by king nero
1 person likes this

Share this post


Link to post
Share on other sites
On 11/30/2017 at 2:07 PM, king nero said:

Doesn't matter if your construction is a product or kit, it needs CE marking.

Agree with you.

 

On 11/30/2017 at 2:07 PM, king nero said:

What does matter is, is your skid a construction work.

Yes.

 

On 11/30/2017 at 9:38 AM, Gurudev said:

Now if some one fabricate structure (completely welded structure & to be erected on site without any addn e.g., towers for antennas) completely in shop, it will be called as a kit (since it is not yet installed on site).

And after installation on site this will be called as a structure.

Am I right?

What is your opinion about our interpretation for kit and structure?

 

Share this post


Link to post
Share on other sites
3 hours ago, Gurudev said:

What does matter is, is your skid a construction work.

Yes.

Is that, 

- yes, indeed it does matter, or

- yes, I confirm the skid is a "construction work" ?

 

For me, a skid is mobile and thus does not fall under the CPR.

If however, it has its own tailormade foundations and will be permanent, I'd call the skid a structure.

Share this post


Link to post
Share on other sites
2 hours ago, king nero said:

If however, it has its own tailormade foundations and will be permanent, 

Yes, every skid has its own foundation where it will stay forever.

If you will call it as a structure, then currently there is no hEN for it,

as I mentioned in the first post EN1090-1 is for kits and components.

 

 

Share this post


Link to post
Share on other sites
2 hours ago, king nero said:

If however, it has its own tailormade foundations and will be permanent, I'd call the skid a structure.

May be I could not interpret your last post. 

Do you mean after installation of skid you will call it as a structure, then we are on same track.

Are we?

Share this post


Link to post
Share on other sites
3 minutes ago, Gurudev said:

May be I could not interpret your last post. 

Do you mean after installation of skid you will call it as a structure, then we are on same track.

Are we?

Yes, in that case it is a structure for me.

 

7 minutes ago, Gurudev said:

Yes, every skid has its own foundation where it will stay forever.

If you will call it as a structure, then currently there is no hEN for it,

as I mentioned in the first post EN1090-1 is for kits and components.

Please define "structure". I think you rely on those definitions too much. See the definitions I quoted above. I see no reason to exclude these skids from application of the EN1090.

Both during fabrication as after installation, it is a construction product.

1 person likes this

Share this post


Link to post
Share on other sites
8 minutes ago, king nero said:

I think you rely on those definitions too much.

Yes, since I have no other reference, any way I am satisfied with your answers.

For me as defined in EN1090-1:

On 11/22/2017 at 3:49 PM, Gurudev said:

Structure is assembled system of structural components

 

Thank you for the valuable comments.

 

Regards 

Gurudev

Share this post


Link to post
Share on other sites

OK, does the difference of a structure, kit, component, construction product, construction work, makes a practical difference to you?

If so, please indicate the repercussions it has to you. We'll see from there.

Share this post


Link to post
Share on other sites

Application point of view,

fabricated skids, base plates for skid column, some loose accessories are dispatched separately.

They gets assembled (base plate welding to column, attaching loose accessories) on manufacturing site forming a single structure, but erection and assembly is in not in our scope,

So we will have to produce separate DoP for each fabricated skid, every type of base plates for skid column, some loose accessories etc.

Which I was thinking as single for whole structure.

Share this post


Link to post
Share on other sites

You can make a single DoP for all components of one skid, including anchor bolts, washers, nuts, ...

Best to include an erection plan, and you refer to this on the DoP.

 

If you have a certain type of skid that comes regularly into production (in identical form), you don't always have to make a new DoP but you can re-use the first one over and over again.

Share this post


Link to post
Share on other sites

But, final assembly will be done by client contractor .i.e., welding, bolting, erection etc.

So how can we produce DoP, for the work done by other contractor?

Share this post


Link to post
Share on other sites

you don't. You only declare performance of your own work. If erector welds, bolts, ... and such, either:

- he does not have work in a workplace, and thus does not fall under the CPR

- prepares his work in a workshop, needs his own EN1090 certification, and has to draw a DoP for his interventions.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.