DIBt APPROVAL INSIDE: • ABOUT DIBT • PART NUMBERS • HUCK ® BOBTAIL DIBT APPROVAL • MECHANICAL VALUES • NEXT STEP

It’s Official: Alcoa Fastening Systems Huck BobTail Offers Maintenance Free Joints The Huck BobTail® 12,14,16, 20mm and 1inch diameters, after lengthy and vigorous independent testing, has gained the prestigious Allgemeine bauaufsichtliche Zulassungen (German national technical approval) from the world renowned DIBt (Deutsches Institut für Bautechnik) for use in both static and dynamic applications in civil engineering. About DIBt Deutsches Institut für Bautechnik (DIBt) is an institute of the German Federal and Laender Governments for a uniform fulfilment of technical tasks in the field of public...

Procuring the Huck BobTail DIBt Approval A copy of the controlled approval The English version is not a controlled document in German can be purchased copy, i.e. the German original may change directly from the DIBt official website and this English translation would not automatically be updated. As it is an uncontrolled copy it is available from Registration is necessary to ensure the AFS Telford, via the Engineering Dept’. A purchaser is kept up to date with any request must be submitted and the final changes to the approval. After entering recipient defined, the Engineering Dept’ the website...

Mechanical Values of the Huck BobTail LockBolt Nominal Diameter Fv,Rk Characteristic value of shear resistance Va,R,k Characteristic value of shear resistance Ft,Rk Characteristic value of tension resistance Characteristic value of tension resistance Tensile stress area Additional Information As it’s such an important part of the approval, the following Additional rules/guidelines are included in the approval text is exact wording taken from the Approval Document: pertinent to use in wind energy plants. SECTION 5 OF DIBt APPROVAL As expected the approval documents the need for Provision for service...

Part Numbers Rjje to the verification of conformity requirement, the products included in the approval have^gpecific part numbers. TFfe-easures thatwherfme products are ordered they meet the DIBt approval standard. Example of Co-ordination Drawing shown below: HUCK MARK, & GRIP NUMBER PIN: DB12112-IGRIP NUMBER) (FINISH CODE) COLLAR: DB12012 (FINISH CODE) BUMP CREASE INDICATES FULL SWAGE. NOTE: ONLY 14.1 MIN. SWAGE LENGTH REQUIRED TO MEET MIN. VALUES. DiBT APPROVED PARTS: PIN: MEDIUM CARBON STEEL COLLAR: LOW CARBON STEEL Alcoa Fastening Systems Ltd Onited Kingdom Delivery sheets will be marked...

Coating Standard coating on the approved products are J45 (Pin) /J46 (Collar) which is equivalent to C4 (typical environments Industrial and Coastal, Chemical Processing Plants) in ISO 12944 http://www.international-pc.com/markets/infrastructure/Documents/iso-12944.pdf Whilst AFS do not offer a specific corrosion guarantee for each of these coatings, we are able to show through extensive testing that the following figures can be expected, providing the fastener is installed correctly. All testing was carried out by an independent 3rd party testing facility at Institut für Korrosionsschutz (Institute...