W steel belt

1. A new type of structure and tunnel support materials

2. The product can be combined with all kinds of bolt joint organization bolting

3. In the incomplete roof strata, best to deal with instability of surrounding rock

Technical parameters

1. The bending section modulus increase 37 times

2. Stiffness increase about 70 times

3. Improving tensile strength of 12%—15%

4. The section utilization high saving material price is low