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are allowed activities. Construction of new facilities own calculations based on the input provided
is not allowed before permit release. To gain time in by the engineering company. The results are
the overall project schedule Partial Building Permits considered acceptable as far as they do not
can be applied for specifc portions of construction exceed by 3% the allowable limits prescribed in DIN
activities. codes. Likewise, the
For the Stade COGEN project the Authority of Proof Engineer checks
Stade agreed to split the Building Permit in three the compliance of the
partial permits for the following areas: shop drawings with The Proof Engineer
• turbine building (GTG & STG areas); DIN codes and their checks the loading
• electrical building; due correspondence conditions (e.g.
• balance of plant. with the calculations
The preparation of the document packages to be and reference compliance with
submitted for each Partial Building Permit was engineering drawings. wind code) and
carried out with the support of a local consultant Once the review makes its own
for the preparation of the forms, in accordance is satisfactorily calculations based
with competent authority requirements, including completed, the on the input provided
the details of the costs of the project as required Proof Engineer puts
by Authority. The consultant was entitled to sign the green stamp of by the engineering
the application for the Building Permit as the certifcation (Geprüft) company
“Engineer” recognized by the local Engineering onto the static
Association. calculations (Statische
Each Building Permit package included the Berechnung) and shop
following documents/drawings: drawings (Ausführung Zeichnungen).
• Unit plot plan; Later on the Proof Engineer issues the Proof
• Plot plan of the whole DOW plant; Report (Prüfbericht), which contains the list of
• Offcial application forms; proofed calculations and drawings, the deliverables
• Building areas and raw & net volumes with regarded as “for information” (i.e. the reference
cost estimates; engineering drawings or the detail shop drawings
• Building description; for formwork) with the “as seen” (Sichtvermerk) or
• Operation description; “not proofed” (nicht geprüft) stamp, and general
• Building application drawings; remarks to be followed for the listed documents
• Drawings for the outdoor installation; or for further documents, e.g. superstructure
• Sewage drawings; deliverables to be submitted after proof of
• Fire safety concept and noise concept; foundation deliverables.
• Crack width concept; Deliveries to the Proof Engineer were: piling,
• Site security; foundations, steel structures, electrical building,
• Cover letter and delivery; HRSG.
• Partial Building Permit.
KKS power plant
Static proof certifcation identifcation system
In addition to the Building Permit and/or related
Partial Building Permit, the authorization to build The plant has been designed and built in
every single structural item prior to its construction accordance with the Identifcation System for
is also subject to the release of the correspondent Power Plants KKS (Kraftwerk Kennzeichnen
Static Proof Report (Prüfbericht) by the Proof System), which serves to identify power plants,
Engineer. Through this report the Proof Engineer sections of plants and items of equipment in any
certifes the conformity with the static design kind of power plants according to task, type and
refected in the static calculations and in the related location. It also serves to identify substations and
shop drawings. overhead lines in the same manner.
The Proof Engineer is an independent consulting The power plant classifcation system (KKS) is
company selected and contracted by the local managed and developed by the VGB (Vereinigung
authority to carry out the review in a specifc project der Grosskraftwerksbetreiber) Working Panel.
of the static design of every structural item which The KKS code defnes a unitary classifcation
eventual failure is a risk for people. It is also duty of system allowing the unambiguous attribution of
the Proof Engineer to make inspections at site to all components inside a power plant. KKS system
verify that construction is done in accordance with consists of three types of classifcation:
the checked design and with the eventual remarks • process-related code for plant system and
made by the Proof Engineer. sub-system classifcation;
The Proof Engineer checks the loading conditions • point of installation code for electrical, control
(e.g. compliance with wind code) and makes its and instrumentation devices;

Impiantistica Italiana - Novembre-Dicembre 2013 65