calculation report

[MauroM]

I open here, even if I don't know where to place this discussion.
I have a question for engineers:

the manufacturer "a" provides the industry "b" a plant.
in the plant there is a metal structure for which an engineer "titizio" enabled
(not dependent on the manufacturer "a") drew up a calculation report with stamp and signature, in which several points of the structure were verified (point 1, point 2, point 3, etc...)

after a few years "a" performs a change of the "point3" of the structure.
the modification is made according to the indications of another ing. "Hello."
"a" asks ing "caio" a written statement (which is not a calculation report! ) in which he states that the change of "point 3" was calculated by him.

At this point I ask myself: what value does this statement have in the case of "guasto" ?
ragpaper?
raises "a" from responsibilities?
What do you think?

 

[Cristallo]

In my opinion (which I am not) everything depends on the content of the statement of the

If it declares that the integrity and performance of the original structure does not vary as a result of the modification of paragraph 3, which he calculated, it assumes a little the value of the certificate of static suitability drawn up for example for abusive structures, so much straw paper is not.
On the other hand, it seems to me that the current rule prescribes that when dealing with existing structures it is made obligatory to verify according to the current norm (not that of construction) the whole structure, even the portions on which it did not intervene.

I think it is more a lawyer's question than an engineer