In construction sites, lap joint, gas pressure welded joint, swelling bolt joint, and etc are being used to joint reinforcing bars. However, there are some problems such as a strength deterioration in the coupling portion, an increasing in the amount of rebar used, a difficulty in concreting, and transformation of rebar material.
The mechanical coupler, "U-TAPER COUPLER", which Hasco has developed, does not transform and shock rebar material. It also fully absorbs static load and dynamic load (tensile,pressing,bending,fatigue strength), and accordingly secures a safety construction of ferroconcrete structure by its durability against earthquake, vibration, and strong wind.