We are using a Remington 476 power hammer (insignificant), and are trying to nail the base plate (2 x 4) to the concrete. This method was recommended to us by a builder. We have abandoned the method and went to using masonry drill bits / screws. So, my question is, why does the power hammer not work (creates cracks/chips) while the drill bit does?
It is a characteristic of that particular piece of concrete. The aggregates could be too big for the Remington to drive through. The concrete may have a high compressive strength formulation that will break before taking the nail. It may be low strength and simply lacks enough cement in the original mix. They may have used too much water in the original mix. Too much water in the mix is the most common cause of weak concrete.
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