Expanding Rock anchors are designed for anchoring Wind Towers in solid rock. They are
constructed of a threaded rod with integral eye and two opposing wedge halves. The anchor is placed in a hole pre-drilled in the rock. Twisting the eye of the anchor forces the wedges against the sides of the hole, locking the anchor in place. Load actually increases the wedging force and develops holding power equal to the full tensile strength of the rod. When anchoring in either bare rock or solid rock covered by soil, rock anchors provide an extremely strong anchor point without the use of concrete.
Rock anchor is installed into the unweathered rock to develop the full strength and stability of the anchor rod. The rock anchor features triple eyes that provide space for up to three guy connections. A hole of the specified size is drilled into the rock and it should be in line with the angle of the guy. The rock anchor is inserted and a bar that passes through the eye turns the rod.
The eye grooves of the rock anchor are contoured to prevent the guy strands from kinking, bending, or even spreading.The good thing about rock anchor is it does not require a wrench for the installation. The design of the anchor gives allowance for self-installation.
The ability of the anchor to bore through rocks also helps to save time and the cost of labor that is required for the boring process. When it comes to drawing a comparison, the cost of installing rock anchor is way lesser than that of installing through the grouting method.
Rock anchor is galvanized according to the ASTM A123. Its wedges are coated with a rust inhibitor which ensures that it lasts for long regardless of the environment of the installation. It also has high tensile strength that makes it withstand all sorts of forces.
