HDB - Shear Reinforcement

The HDB elements with double headed ribbed studs, welded to a mounting rail, are used as shear and punching reinforcement. HALFEN HDB shear rails are supplied as system elements, for short delivery times, and as complete elements, which are manufactured to measure on demand. They are preferably put in from the top after laying the flat slab reinforcement.
They are available as 2-stud and 3-stud elements which can be combined into larger assemblies with the appropriate arrangement. The symmetrical arrangement of the HDB anchor guarantees the correct installation. The patented clip bar ensures that the heads of the studs are covered by concrete.    

HDB anchor rail for shear reinforcement.

Assembly:

• Simple and quick installation
• Reduction of construction period
• The longitudinal reinforcement does not have to be enclosed.
• Installation after the upper and lower longitudinal reinforcement have been laid
• Reduction of the number of anchors owing to the larger permissible tangential anchor distances compared with brackets, in accordance with the German National Annex NA(D) for EN 1992-1-1:2011-01 (Eurocode 2)

Planning:

• Higher punching loads compared with conventional link reinforcements, according to the German National Annex NA(D) for EN 1992-1-1:2011-01 (Eurocode 2)
• Officially approved as shear reinforcement in flat slabs, floor slabs and individual foundations
• The HDB anchor rail can also be incorporated into finished and semi-finished parts
• Also approved for predominantly non static loads
• Standardised product range for the most common sizes

Security:

• Approved across Europe by the German Institute for Building Technology (DIBt) in Berlin
• Simple visual check of the installed elements
• Virtually slip-free anchoring of the shear reinforcement
• Securing of the concrete cover with the corresponding accessories such as spacers and clamping brackets

Advantages of the HALFEN HDB anchor rails as shear reinforcement:

• Higher load bearing capacity than conventional link reinforcements
• For panel from 18 cm thick
• Can also be installed in pre-fab concrete slabs
• Time saving installation from above
• Standardised product range with short delivery times, standard items are available from stock
• Convenient and user-friendly software
• Officially approved for predominantly static and dynamic loads
• European Technical Approval ETA-12/0454

Quality features:

• stud diameters 10 to 25 mm
• 2 and 3-stud elements
• officially approved (DIBt Berlin)
• ideal for for the insertion from the top after laying the flat reinforcement
• Short delivery times for system elements, available as standard items from stock

The HDB anchor rail as shear reinforcement

The HDB-S anchor rail consists of double headed anchors (B500 ribbed or smooth) with swaged heads. A mounting bar that is secured by tack welds on the anchor heads, connects the individual anchors to the HDB-S rail. HDB S rails can have up to 10 anchors, which are preferably used from the top for laying the surface reinforcement. By arranging the individual elements in rows, large areas can be quickly reinforced.

Another advantage of the S-HDB anchor rail is its the virtually slip-free bond with the concrete, which is guaranteed by the positive engagement of the swaged heads. The shear reinforcement can therefore be better anchored, particularly with thinner plates, and that is why the reinforcement cross-section of the HDB-S anchor can be reduced by up to 20%.The HDB complete elements are welded to a flat steel rail.
Where the reinforcement is congested HDB elements are ideal for installation from below, i.e. the elements are placed on the formwork by special spacers. The lower and upper reinforcements are then put into position.    

Quality features:

• Stud diameters 10 to 25 mm
• Complete elements are manufactured to measure with 4 till 10 double headed studs
• Individual distances of the studs possible for the adjustment to the reinforcement grid
• Officially approved (DIBt Berlin) for all structures with shear loads
• Spacers available for concrete cover thicknesses from 15 to 45 mm