I DIY, drilled and insert an expansion bolt (m6) into the concrete ceiling to hang a 6 kg chandelier. The manual recommended M6 bolt. I accidentally drilled a much bigger dia hole and the bolt keep turning render it not effective. Neither can I take it out. I’d hv to grind off. Now I hv to drill another hole which this time I will drill it same dia as the bolt. I cannot afford to shift the chandelier too off center. I believed the new hole can’t be too close to the 1st hole.
Is there a min distance for the 2nd hole away fr the 1st hole. Is 1” away too close? Any engineer here care to advise?
Is there a min distance for the 2nd hole away fr the 1st hole. Is 1” away too close? Any engineer here care to advise?