Fastening plates

Fastening plates manufactured by Anstar Oy are steel plates equipped with grips, designed for installation in concrete before it hardens. Related structural attachments are performed by welding directly onto the steel plate.

Fastening plates are used to form a welding attachment surface on the surface of in-situ cast and precast concrete structures. They are utilized in welding joints that transfer loads between concrete structures and other structures. The plates are installed in the in-situ cast or precast mold and are cast into the concrete.

The design of the fastening plate joints can be carried out using Anstar Oy's ASTEEL software, which is used for the sizing of the plates for the structure's loads and the plate's placement at the edge of the structure. The software sizes the reinforcement of the fastening plate as well as the profile to be welded to the plate and its weld joint. Joint design and strength calculations are produced at the same time.

Anstar Oy's fastening plate products are suitable for the following structures:

  • AKL®: transferring light loads in element and in-situ cast structures.
  • KL: transferring loads in very narrow structures and at the edge of the structure with full tensile strength.
  • JAL®: transferring heavy loads in element and in-situ cast structures.
  • AKLP, AKLJ, AKKT: long fastening plates are used in locations where several attachment points are needed side by side. AKLP and AKLJ plates are suitable for system attachment, where future attachments that are not precisely known need to be accommodated.
  • AKKT: angle rods are used at the corners of columns.
  • AKLC-Custom: project-specific custom fastening plates are designed using the ASTEEL software.

Heavy-duty Fastening Plates

Standard Fastening Plates



A-BEAM® and Anstar’s connection technology form part of the frame system, offering cost-efficiency and flexibility for construction.


Diagonal ties are used in concrete sandwich panels to connect the outer skin with the inner skin through the insulation layer. The ties transfer the self-weight and wind loads of the outer skin to the inner skin.

Fastening plates

Fastening plates are used on cast-in-place and prefabricated structures to provide a mounting surface for welding.

Suspension components

Anstar has developed bracket and support systems for efficient and affordable construction. The connection pieces are easy to install both at the prefabrication factory and on site.

Balcony connections

Balcony hinges are used to transfer horizontal forces from the balcony to the building frame. The hinged connection enables vertical movement.

Rebar bolts and anchor bolts

high-quality rebar and anchor bolts are responsibly made with recycled steel. There are two different basic types of bolts: ATP- ja AHP® rebar bolts and ALP® anchor bolts

AEP® hidden bracket

AEP® hidden brackets are used to fasten a concrete element beam or Anstar A-BEAM® to the side of a concrete element column, wall or another beam. 

AOK® support

The AOK® support is used in a hollow-core slab floor opening as the load-bearing structure for the end of the slab. The AOK® support has been granted a patent, which enables exclusive rights to the most cost-effective support in the market.

Column shoes

Column shoes are used in light- and heavy-duty column extension and foundation connections; wall shoes are used in the tension connections of stiffening wall and shaft elements, retaining walls and earth pressure walls that stiffen the building.

Rebar couplers

Rebar couplers are used for joining rebars with full tension capacity. The ends of bars to be joined are provided with threads, and the bars are joined using a coupler sleeve that transfers the force on the rebar across the connection.

Bracing connections

ADE® and ADK® bracing connections are designed for stabilising the concrete element frame. These connections
are used in the joints between concrete columns and stabilising steel bracings.


Tero Viljakainen

Managing Director
+358 44 761 3510

Jari Vilkman

Key Account Manager
+358 40 083 0091

Sampsa Taitto

Sales Manager
+358 40 627 3649