Cast-in FixingsCast-in Fixings - General Information

Cast-in fixings are fastening elements that are installed in the formwork before the concrete is poured and become an integral part of the structure once the concrete has hardened. Unlike post-installed anchors, they are embedded directly during construction and are therefore fully integrated into the structural system from the outset.

These systems are widely used in reinforced concrete construction as well as in precast concrete production. They create reliable and precisely positioned connection points for structural and non-structural components and are commonly applied in buildings, infrastructure projects and industrial facilities.

The cast-in product group includes:

• Anchor channels (with corresponding bolts)
• Headed studs and anchor bolts
• Cast-in plates and inserts
• Threaded sockets and connection elements
• Reinforcement connection systems (rebar continuity systems)

Reinforcement connection systems are an important part of this group. They are used to ensure structural continuity between concrete elements, for example in wall-to-slab connections, construction joints or precast segment connections. By enabling reinforcement bars to be connected in a controlled and verifiable way, these systems contribute directly to the transfer of forces across structural joints and to the overall integrity of the concrete structure.

Load transfer in cast-in fixings is achieved through mechanical interlock and bearing mechanisms within the hardened concrete. Depending on the system and loading situation, resistance may be governed by steel capacity, concrete failure or bond interaction.

A key characteristic of cast-in systems is that they must be considered early in the design and planning phase. Since they are installed before concreting, coordination between designers, precast manufacturers and contractors is essential. Correct positioning and secure fixation in the formwork are crucial to ensure that the intended load-bearing function is achieved once the structure is completed.

Where no harmonized standard exists, cast-in fixings are typically placed on the European market on the basis of European Technical Assessments (ETAs).

Construction Fixings Europe represents manufacturers of cast-in fixing and reinforcement connection systems at European level and supports the development of clear, technically sound and harmonised regulatory and assessment frameworks for this product group.