Overview
ISO 22966:2009 (identical to ISO 22966:2009) specifies common requirements for the execution of concrete structures, covering both in‑situ construction and works using prefabricated concrete elements. Its primary purpose is to transfer design requirements to the constructor, serve as a standardized execution checklist and ensure intended reliability and serviceability in line with design standards (e.g., ISO 2394). The standard is applicable to both temporary and permanent concrete structures and requires that an execution specification list all project‑specific requirements.
Key topics and technical requirements
The standard organizes execution activities and sets out technical topics that constructors and specifiers must address. Major areas include:
- Execution management
- Documentation, responsibilities and quality management principles (including handling of non‑conformities).
- Falsework and formwork
- Basic requirements, materials, design, installation and removal; special formwork and embedded inserts.
- Reinforcement
- Material handling, cutting, bending, storage, assembly, joints and welding considerations.
- Prestressing
- Materials for prestressing, tendon installation, tensioning and protective measures (grouting/greasing).
- Concreting
- Specifying concrete for execution (not production conformity), pre‑concreting operations, delivery, placing, compaction, curing, protection and post‑concreting works.
- Execution with precast concrete elements
- Factory and site production interfaces, handling, storage, placing, jointing and erection specifications.
- Geometrical tolerances
- Reference systems and tolerances for foundations, columns, walls, beams, slabs, surfaces and inserts.
- Guidance annexes
- Informative annexes provide practical guidance on documentation, quality management, falsework/formwork, reinforcement, prestressing, concreting and tolerances.
Note: ISO 22966 excludes specification/production/conformity of concrete, product standards for precast production, safety/health requirements, contractual responsibilities and concrete members used solely as temporary aids.
Practical applications - who uses this standard
The standard is intended for:
- Designers and specifiers preparing the execution specification and drawings.
- Contractors and site managers executing formwork, reinforcement, prestressing and concreting.
- Quality managers and inspectors implementing site quality management and dealing with non‑conformities.
- Clients and project owners who require standardized execution criteria and verification.
- Precast producers and erectors coordinating site and factory responsibilities.
Adopting ISO 22966 improves coordination between design and construction, reduces execution risk, and provides consistent technical requirements for complex concrete works.
Related standards
Relevant normative references and related standards include:
Keywords: ISO 22966, execution of concrete structures, concreting, formwork, reinforcement, prestressing, precast, execution specification, geometrical tolerances, quality management.
