Connections for precast elements

The FDB brochure 2.0

In precasting, the individual components are manufactured prior to their installation away from the site and are subsequently assembled on location for the actual loadbearing structure. The connections between precast components must be capable of transmitting the compressive, tensile and shear forces arising over the joints.

The connections between the precast components are of critical significance for the loadbearing capacity and the serviceability of precast structures. The choice of suitable means of connection, moreover, is often decisive for the economy of the structures. Bending components are supported on elastomeric bearings, depending on the intended use and the loads applied, in order to compensate for deformation – for example, caused by deflection – and to transmit the designed supporting forces. Tensile and shear forces, for example are transmitted by shear dowels, welded connections, reinforcement elements or special embedded parts. Abutment of columns or wall elements usually takes place in a mortar bed to ensure uniform transmission of forces without tension peaks.

In 2011, the Fachvereinigung Deutscher Betonfertigteilbau (FDB) published the brochure “Connections for precast components,” which by now has become a standard reference for building with precast components. In the course of completely revising the contents of the brochure for the first time, a number of the main topics were completely replaced. The revised brochure on connections for precast components deals, among others, with the following topics:

Half joints


Abutting columns


Frame corners

Composite sections

The brochure, moreover, contains more than 100 figures and 27 design sketches for facilitating the design and detailing of connections in precast construction. The brochure will be published in a revised edition in mid-2019 (see

Related articles:

Issue 2014-08 H-Bau Technik

Optimized connection between steel and concrete

Connection elements for connecting steel girders to reinforced-concrete elements should be easy to install and precision-fixed. At the same time, cold bridges for different actions and loading stages...

Issue 2021-12

Connector for precast concrete structures

(10) US 2021/0277650 Al (22) 05.03.2021 (43) 09.09.2021 (57) A connector and a method of manufacturing a connector are provided for joining a precast concrete structure and a support structure such as...

Issue 2019-02 Innovative connections with toothed high-performance steel interfaces

Highly efficient force transmission between precast HPC sections

This new type of connection adds another option to the range of possible connections in precast reinforced concrete construction. Columns can be produced without interrupting the standard formwork due...

Issue 2011-11 Balcony connection according to standard

New Halfen HIT HP

As standard, all new HIP HP ISO elements are classified according to the European fire resistance rating for load-bearing structural components with and without room closure REI 120 (F120-AB). At a...

Issue 2016-08 Betomax

Punching shear and bonded reinforcement system

Flat slabs and/or element floors (precast slabs with in-situ structural concrete topping) as used in industrial and commercial buildings are state-of-the-art and allow great freedom in plan design....