T-headed bars

HRC Europe / Products / T-headed bars

Headed reinforcement

Headed bars (also “headed reinforcement”) are reinforcing steel bars (rebar) for concrete structures, which are equipped with a device for mechanical anchorage in one or both ends. The anchorage device (the “head”) has often the shape of a plate, which makes the end look like the letter “T”. Therefore, the term “T-headed bar” is used as well.

Headed bars are used like common reinforcing bars, with the “head” providing the anchorage of the bar. This type of anchorage is an alternative to anchorage by rebar bends or hooks.

The anchorage capacity provided by the T-head depends on three factors:

  1. Bearing area of the head
  2. Stiffness of the head
  3. Strength of the head-to-bar connection
hrc100-anchorage-capacity

History of headed bars

Anchor plates have been used for anchorages of rods in structures for centuries. The use of this principle for rebar as well is a consequence of the development of reinforced concrete. Early examples of headed bars are shown in publications more than 100 years ago.

The newer development of headed bars was triggered by more demanding constructions, as offshore concrete structures and the evolution of earthquake engineering, requiring high structural performance. The use of headed bars in concrete design has created the need for guidelines in the design codes for structural concrete and standardized specifications of the product.

HRC headed bars

HRC (Headed Bar Corporation) Europe was a pioneer in the newer development of headed bars and has produced such products since 1985. HRC headed bars are characterized by their high performance and consistent, high quality.

HRC100/200 Series T-Headed bars are manufactured, under strict quality control to ensure a zero-slip connection between the head and the rebar, that exceeds the actual tensile strength of 500MPa-reinforcement bar acc. EN 1992-1-1, Annex C.

Head sizes are designed to transfer the full rebar force into multi-axial stresses in the concrete beneath the head, without crushing the concrete (strength class C30/37 or higher).

Advantages offered by T-headed bars

hrc100-straight-anchorage-lenght

Straight anchorage length

hrc100-anchorage-bend

Anchorage bend

hrc100-anchorage-by-hook

Anchorage by hook

hrc100-mechanical-anchorage-hrc-t-head

Mechanical anchorage: HRC T-head

HRC100 Series T-headed bars

HRC110

HRC 110 Head / HRC Europe

HRC120

HRC 120 Head / HRC Europe

HRC150

HRC 150 Head / HRC Europe

HRC170

HRC 170 Head / HRC Europe
Rebar size

Geometry of HRC100 T-head plates

øABCDE120E150I
mmmmmmmmmmmmmmmm
1635601650121250
2040801860141665
25501002070162080
326512025902025100
40---11025--

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HRC150S – stainless T-headed bars

HRC150S stainless steel T-headed bars combine the high performance of standard HRC100 Series with the enhanced corrosion resistance of stainless steel.

HRC150

HRC 150 Head / HRC Europe
Nominal rebar size [mm]16202532
T-head diameter I [mm]506580100
T-head thickness E [mm]12162025

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Material

HRC150S T-headed bars can be supplied in 3 material combinations:

CombinationRebarT-head plate
1Stainless steelCarbon steelLimiting the use stainless material
2Carbon steelStainless steelSolving concrete cover issues
3Stainless steelStainless steelHigh durability of entire product

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stainless-T-heads-on-black-and-white-rebar

Rebar according to EN 1992-1-1, Annex C, with nominal yield strength of 500 MPa and acc. to national requirements, stainless rebar quality, typical grade 1.4362.

stainless-T-heads-black-and-white-bar-break

HRC150S - Performance and Certification

This implies the development of at least 95% of the actual tensile strength of the rebar (Rm,act) and the full nominal elongation at maximum load (Agt). Tests have shown a ductile rupture of the rebar, even at loads above 800 MPa.

HRC200 Series T-headed bars with improved fatigue behavior

HRC220

HRC 220 Head / HRC Europe
Rebar size

Head dimension

øIJ
mmmmmm
165012
206014
257016
329020

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