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Torque guidline for hilti anchors7/28/2023 ![]() ![]() As with spalling, the biggest problem with anchor damage is that it can easily go undetected. The result is a clear drop of the steel failure load under tension, shear, or combined tension and shear forces, up to the point of breakage. If the anchor is significantly over-torqued, then the steel bolt can be damaged – or even broken apart – by this torsional moment. However, when the anchor sits far from the slab edge, the splitting forces can be absorbed by the surrounding concrete without any damage. Over-torqueing an anchor always results in the cone being pulled too far into expansion sleeve, generating high splitting forces. ![]()
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