CEN/TC 104/SC 2 - Execution of concrete structures

This document specifies the scheme for assessment and verification of competence of personnel installing post-tensioning kits.
The document provides provisions for the training providers, assessment bodies and possible certification bodies.
Requirements to the minimum competence and experience for personnel installing post-tensioning kits are given in EN 17678-1.
This document can be amended with a national annex where indicated in the text.

This document specifies the minimum training and registration requirements for post-tensioning personnel involved in the installation of PT kits. These PT kits are typically used in concrete structures using bonded or unbonded tendons in accordance with the relevant execution specifications, product standard and / or appropriate technical assessment.
This document specifies the tasks that the various categories of PT personnel can undertake.
For the purposes of this document, PT personnel means: PT Manager, PT Supervisors, PT Operatives and PT Trainees who are directly employed or indirectly employed on a sub-contract basis.
This document does not cover general safety and health aspects.
This document does not cover contractual issues.
prEN 17678-2:2022 deals with the assessment of competence.

(1)   This European Standard gives common requirements for execution of concrete structures, it applies to both in-situ works and construction using prefabricated concrete elements.
(2)   This standard expects the execution specification to state all the specific requirements relevant to the particular structure.
(3)   This standard is applicable to permanent as well as temporary concrete structures.
(4)   Additional or different requirements should be considered and, if required, given in the execution specification when using:
a)   lightweight aggregate concrete;
b)   other materials (e.g. fibres) or constituent materials;
c)   special technologies/innovative designs.
(5)   This standard does not apply to concrete members used only as equipment or construction aids for the execution.
(6)   This standard does not cover the specification, production and conformity of concrete.
(7)   This standard is not applicable to the production of precast concrete elements made in accordance with product standards.
(8)   This standard does not cover safety and health aspects of execution, or third party safety requirements.
(9)   This standard does not cover contractual issues or responsibilities for the identified actions.

This European Standard gives the procedures to be used for grouting of tendons in post tensioned prestressed concrete.  It is applicable to all types of structures including bridges and buildings.
This standard also covers suitability testing and inspection testing for grouts and their component materials used on a project.

This European Standard describes the test methods for grout specified in EN 447. Testing shall be performed in accordance with the test methods given in this standard (reference test methods). The test methods are applicable to grout for all types of structures including bridges and buildings.

This European Standard covers the materials that may be used in the manufacture of cement grouts and the required properties and composition of the grout. It is applicable to grouting of tendons in all types of structures including bridges and buildings.

This Standard is applicable to uncoated cylindrical steel sheaths with a corrugated profile and with a nominal internal diameter of up to 130 mm and their connectors (couplers) which are assembled to form ducts for prestressing tendons in post-tensioned prestressed concrete elements. It applies only to sheaths and connectors made of interlocked or welded strip. The seals required between sheaths and couplers are not covered by this standard.

The project will be the revision of ENV 136-1: 2000 with the intention to convert the prestandard into a European standard. The European standard will provide common requirements for the execution of concrete structures. It will be applicable to temporary as
well as permanent concrete structures. The standard will not cover the specification, production and conformity of concrete as well as contractual issues or responsibilities for the identified actions.

This European Prestandard gives common requirements for execution of concrete structures. In particular, this part gives requirements for structures designed according to ENV 1992-1 and for the concrete part of composite structures designed according to ENV 1994-1. In the case of civil engineering works, different oradditional requirements need to be considered and, if required, given in the project specification. This prestandard permits the project specification to state specific requirements relevant the particular structure. This prestandard is applicable to temporary as well as permanent concrete structures.