Timber concrete composite systems
Timber concrete composite systems consist of a timber element and a concrete slab that are joined together in a shear-resistant manner. The shear-resistant bond can be achieved, for example, using screws, dowels, birdsmouth joints, punched metal plate fasteners, flat steel locks or glued-in sheets. Formwork with or without foil can also be arranged.
Regulatory framework
There are no conclusive technical rules for the design and execution of timber cocrete composite systems, cf. MVV TB, Annex A 1.2.5/1, no. 4. DIBt grants general construction technique permits (aBG) for these construction techniques. The aBG can also be granted in combination with a national technical approval (abZ), when construction products are being used for which no Technical Building Rules (cf. MVV TB Chapter C.2) and no generally recognised technical rules exist.
European Technical Assessments (ETAs) can also be issued for timber concrete composite products.
National procedure
To prepare an abZ/aBG for your construction product, we need an application from you. We recommend that you contact us prior to doing so. Feel free to send us your enquiry informally via email to dibt(at)dibt(.)de or to the competent technical contact listed in the top right.
For a first assessment, please send us the following information:
- Description of the construction product and its intended field of use
- e.g. material, configuration, number of sizes, variants, dimensions
- e.g. use in walls, ceilings, interior construction, building services
- Description of the construction technique and its field of application
- e.g. design of walls, ceilings, elements, etc., and interaction of components
- e.g. application in foundation engineering, reinforced concrete construction, building insulation; as load-bearing or non-load-bearing component; under static and quasi-static loading; fire exposure; other environmental exposures
- Information regarding impact on regulatory concerns
- in particular structural integrity, fire protection, health and environment protection, sound insulation as well as thermal performance
- Explanation of need for an abZ/aBG
- Do you significantly deviate from the Technical Building Rules?
- Or do neither Technical Building Rules nor generally recognised technical rules exist?
- Contact details
- preferably email address and/or telephone number, as well as name, organisation/company, and postal address
We will then contact you to clarify the next steps.
If you already hold a DIBt approval and/or construction technique permit and wish to apply for an amendment, supplement, or renewal, please use the form provided below.
- pdf-Datei Application for amendment / supplementation / renewal of a national technical approval and/or construction technique permit (4 pages ) Last updated: 10 April 2024; Application form
European Technical Assessment (ETA)
To start the ETA procedure, please submit the form below. We will then check if the prerequisites for issuing an ETA are met, i.e., in particular, if the product is not fully covered by an existing harmonised standard. If the prerequisites are met, we will check whether a European Assessment Document (EAD) covering the requested assessment scope already exists or still needs to be developed. If an EAD needs to be developed or amended, a complete technical file needs to be established before the procedure can begin.
- pdf-Datei Form for requesting a European Technical Assessment (ETA) (2 pages ) Last updated: 11 March 2025
| Subject concerned | Applicant | Decision no. |
Validity
from / to |
|---|---|---|---|
| Holz-Beton-Verbundkonstruktionen unter Verwendung von Heco-VB Schrauben und SFS VB Schrauben | HECO-Schrauben GmbH & Co. KG Dr.-Kurt-Steim-Straße 28 78713 Schramberg | Z-9.1-342 |
Z:
09.10.2025 G: 09.10.2030 |
| Dennert Holz-Beton Verbundelemente | VEIT DENNERT KG Veit-Dennert-Straße 7 96132 Schlüsselfeld | Z-9.1-474 |
Z:
01.09.2021 G: 01.09.2026 |
| HBV-Schubverbinder aus Streckmetall und vorgefertigte Bauteile mit eingeklebten HBV-Schubverbindern für ein Holz-Beton-Verbundsystem | TiComTec GmbH Karl-Seitz-Straße 19 63768 Hösbach | Z-9.1-557 |
Z:
21.03.2025 G: 21.03.2030 |
| Holz-Beton-Verbundkonstruktionen unter Verwendung von Schmid Schrauben RAPID® T-Con als Verbindungsmittel | Schmid Schrauben Hainfeld GmbH Landstal 10 3170 HAINFELD ÖSTERREICH | Z-9.1-845 |
Z:
11.10.2021 G: 11.10.2026 |
| BiFRi Verbund-Anker als Verbindungsmittel für das FRIEDRICH Holz-Beton-Verbundsystem | FRIEDRICH GmbH Verbundsysteme Hofer Straße 21 95233 Helmbrechts | Z-9.1-851 |
Z:
11.04.2025 G: 13.03.2030 |
| Hobet Schrauben als Verbindungsmittel für Holz-Beton-Verbundsysteme | SIHGA® GmbH Gewerbepark Kleinreith 4 4694 OHLSDORF ÖSTERREICH | Z-9.1-861 |
Z:
31.05.2021 G: 24.05.2026 |
| Holz-Beton-Verbundkonstruktionen unter Verwendung von Elascon SFix Schrauben als Verbindungsmittel | Elascon GmbH Im Erzenbach 17 79297 Winden | Z-9.1-886 |
Z:
21.03.2024 G: 16.01.2029 |
| Holz-Beton-Verbundkonstruktionen unter Verwendung von Ancon Composite Connector als Verbindungsmittel | Leviat GesmbH Leonard Bernstein Strasse 10 1220 WIEN ÖSTERREICH | Z-9.1-903 |
Z:
10.12.2021 G: 10.12.2026 |
| Tragende Geschoßdeckenkonstruktionen unter Verwendung der DUOBLOCK Holz-Beton-Verbundbauweise | Brunthaler Holzbau GmbH & Co. KG Pfarrkirchener Straße 31 84385 Egglham | Z-9.1-904 |
Z:
02.02.2022 G: 02.02.2027 |
| Fertigteildecken in Holz-Beton-Verbundbauweise über formschlüssigen Verbund | ZECH Systeme SE Hansator 20 28217 Bremen | Z-9.1-911 |
Z:
31.05.2024 G: 31.05.2029 |
| Tragend verklebte Brettsperrholzelemente "TS3-PTS-Elemente" für Decken- und Dachkonstruktionen | Timber Structures 3.0 AG Niesenstrasse 1 CH - 3600 THUN SCHWEIZ | Z-9.1-917 |
Z:
01.03.2024 G: 01.03.2029 |
| DUOBLOCK-2 Holz-Beton-Verbundelemente | Brunthaler Holzbau GmbH & Co. KG Pfarrkirchener Straße 31 84385 Egglham | Z-9.1-925 |
Z:
17.12.2024 G: 17.12.2029 |
| Subject concerned | Applicant | Decision no. | Issued on |
|---|---|---|---|
| SFS VB screws | SFS Group Schweiz AG Rosenbergsaustrasse 10 CH - 9435 Heerbrugg SCHWEIZ | ETA-13/0699 |
01.06.2022 |
| HECO-VB (HVB) | HECO-Schrauben GmbH & Co. KG Dr.-Kurt-Steim-Straße 28 78713 Schramberg | ETA-24/0664 |
12.08.2024 |