We have developed Bulge-Formed screw. When the screw is formed on the inner surface, the outer surface becomes uneven and the surface increases, so fixing with adhesive or concrete will increase the pull-out strength.
M16 Bulge Insert for Precast Concrete
| Tensile Load | Type | Lenght | Steel grade | Weight | Concrete strength |
|---|---|---|---|---|---|
| 69kN | M16 | 75mm | SUS304 | 30g | 59N/mm2 |
This tensile test is carried out with concrete strength: 60N/mm2.
M36 Bulge Insert for Precast Concrete
| Tensile Load | Type | Lenght | Steel grade | Weight | Concrete strength |
|---|---|---|---|---|---|
| 107kN | M36 | 100mm | Steel | 75g | 59N/mm2 |
This tensile test is carried out with concrete strength: 60N/mm2.
M16 Bulge Anchor (Adhesive system)
| Tensile Load | Type | Lenght | Steel grade | Weight | Concrete strength | Drilling diameter | Drilling depth |
|---|---|---|---|---|---|---|---|
| 28kN | M16 | 55mm | SUS304 | 20g | 27N/mm2 | Φ22 | 55mm |
This tensile test is carried out with concrete strength: 27N/mm2.
Enlarged view and Cross section of Bulge-Forming
