Cast-in connections

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High-strength cast-in connections

HRC700 Series is a system for connection of steel parts to concrete structures. Examples are fastening of columns and beams, poles for guardrails, noise barriers and fences and connections for brackets, ladders etc.

The HRC700 system consists of separately manufactured threaded components, which are attached to reinforcing steel bars.

  • All components are attached to the rebar in such a way, that the full capacity is transferred from the threads to the rebar.
  • The female HRC720 and 720SS components allow the connection of threads of strength class 8 (A4-80) to a concrete structure, i.e. the full capacity of class 8.8 (A4-80).
  • The attached rebar can be tailor-made to fit the actual design.
  • A combination with HRC100 Series T-headed bars allows for short anchorage lengths and increases flexibility in design and reinforcement detailing.
hrc700-illustration

HRC700 Series cast-in connections 

HRC710

HRC 710 geometry
  • External rolled threads
  • Rebar length can be tailor-made – the connection can be part of the reinforcement of the structure.
  • For design capacity see technical approval (SINTEF TG 20072)
  • Can be supplied hot dip galvanized
Thread dimensionRebar diameter [mm]Typical thread length [mm]Characteristic Yield loadCharacteristic Tensile load
AØB[kN][kN]
M202080110134
M242080157180
M2725100206252
M3025120245282
M3632160402462

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HRC720 & HRC720SS

HRC 720 geometry

HRC720

  • Internal threads (sleeves)
  • Rebar length can be tailor-made – the connection can be part of the reinforcement of the structure.
  • Sleeve in "black" steel
  • No protruding threads
  • Capacity as bolts class 8.8
carbon-steel-sleeve-on-rebar-HRC720
Thread dimensionRebar diameterHRC720 “Black steel sleeve”
AØ
[mm]
C
[mm]
D
[mm]
E
[mm]
M1620283050
M2025353555
M2425354060
M3032455070
M3640556080

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HRC720SS

  • Internal threads (sleeves)
  • Rebar length can be tailor-made – the connection can be part of the reinforcement of the structure.
  • Sleeve in stainless material (1.4404)
  • Length of sleeve > concrete cover
  • Capacity as bolts class A4-80
stainless-sleeve-on-black-rebar-HRC720SS
Rebar diameterHRC720SS Stainless steel sleeve
AØ
[mm]
C
[mm]
D
[mm]
E
[mm]
M1620303080
M2025383580
M2425454080
M3032505080

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Principle of HRC720SS

HRC720SS is a combination of a stainless threaded sleeve and “black” rebar (nom. yield strength 500MPa).

The basic product idea is to limit the use of stainless-steel material to where it is required: in the concrete cover zone.

  • Strength as bolt A4-80
  • Stainless sleeve longer than concrete cover
  • Possible to combine with HRC T-head anchorage

Reduction of stainless material to a minimum

hrc700-principle-illustration