Rock bolt with Expansion shell

High loading capacity Dywidag Expansion shell, Rock bolt with Expansion shell Expansion shells are used for fixing single-sided shuttering or similar structures in rock, concrete or comparable load-bearing ground. The expansion shells hold in any rock strata which is sufficiently competent to provide an adequate anchorage. They are designed to anchor in soft ground or hard rock. In good strata the anchorage exceeds the ultimate strength of the steel bolt. All expansion shells