For threaded rods embedded into concrete with epoxy HIT HY 200 the minimum spacing recommended for 1 1/4” diameter and 25” embedment is 6.25”. The equipment we are installing has 4” spacing for some of the bolts. Can we still use these bolts, under tension load?
Hi Jose,
Per ESR-4868, the minimum anchor spacing for HIT-HY 200 V3 with a 1-1/4“ threaded rod is 6.25“. The spacing dimensions, edge distances, and concrete thicknesses that are published in the ICC-ES evaluation reports for mechanical anchors and adhesive anchors installed in concrete are based on specific tests in the ICC-ES acceptance criteria for mechanical anchors in concrete (AC193) and the acceptance criteria for adhesive anchors in concrete (AC308). Thus, if anchors are used in conditions outside of the published dimensions in the ESR for minimum spacing, edge distance, and concrete thickness, there is an increased risk of splitting the slab when the installation torque is applied. Hilti would not recommend installing anchors below the minimum required spacing, and any decision to do so would need to be a judgement made by the Engineer of Record.
Regards,
Katelyn