If you are erecting a fence on concrete, you can dig out holes and sink the posts in place, but it is much easier to use bolt down brackets. These brackets are simply fixed to the concrete surface, and the fence posts are inserted and secured into the bracket socket.
Anchoring Bolts, Railings and Rebar in Concrete with Anchoring Epoxy. Anchoring handrails or securing any object to concrete or masonry using threaded rods, rebar, bolts or dowels requires a high strength, permanent bond, especially applications that will be subjected to heavy loads or vibration.
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