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  European Technical Approval and CE-marking

Foundation bolts // application

Example of application of HRC 730 foundation coupler

HRC 730 foundation coupler consists of two parts:

• sleeve part: sleeve with internal threads, welded to a reinforcement bar of any length
• threaded part: threaded bolt of any length and desired quality

HRC 730 foundation coupler uses as follows:

1. Foundation coupler is installed even with the surface of the foundation and cast in. The opening in the sleeve is closed with a plastic cap to prevent cement lime or dirt from entering into the sleeve. There are no protruding part witch can be damaged or could present a danger.
2. The threaded part is screwed into the sleeve. Under combined tension- and shear load the high-strength material of the bolt (quality 8.8 or better) will guarantee the necessary capacity. Maximum allowable tension load is limited by the capacity of the rebar, but shear load is restricted by the concrete pressure against the sleeve.
3. The outer diameter of the sleeve gives the bolt better transversal contact against the concrete and therefore a higher shear capacity compared to cast in threaded rods. Higher capacity in the threaded part can therefore be used to transmit big shear forces from a footing and down into the concrete.
4. The replaceable threaded part makes it possible to change damaged parts in an easy way and at the same time to keep a sound foundation.