The roof material is HRB500 or customization
| φ16 | 345 | 510 | 25 | 69 | 100 | 1.6 |
| φ18 | 345 | 510 | 25 | 87 | 126 | 2.0 |
| φ20 | 345 | 510 | 25 | 108 | 156 | 2.5 |
| φ22 | 345 | 510 | 25 | 131 | 189 | 3 |
Rock bolts are used in tunneling works to support portal face and tunnel roof, as well as for fore-poling. Other applications are to stabilize slopes and fix rock fall barriers.
The minimum length of the thread shall be 150±5mm or customization
Fully threaded bar - can be cut and coupled at any point. Robust threadform - ideal for construction site use. Coarse pitch threadform with two flats - ensures self-cleaning of thread. Fully galvanized systems -galvanized threadbars and accessories also available from stock.
1. The raw material is high-strength alloy strip steel;
2. The installation is the easiest;
3. No anchoring agent required;
4. The friction between the bolt and the rock mass is large;
5. It has high shear and tensile strength;
6. Equipped with high-strength pallet, the pallet is evenly stressed;
Handan Zhongfu Industrial and Mining Accessories Co., Ltd. was established in 2011, located in Hebei-Yongnian, China's fastener industry base. It has built its own modern large-scale industrial and mining supporting material production workshop, anchoring automation workshop, mesh workshop and bolt workshop. It is a modern high-tech enterprise company integrating research and development, production and sales of industrial and mining supporting accessories.
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