Technically, you need to wait the 28 days to achieve the full value of the expansion bolt or sleeve anchor, but at 7 days the concrete should be a 1/4 of it's compressive strength, 14 days 1/2 and so on. If you crank down on these, concrete will spall and you will have zero value on that fastener. I have done the testing on these many times, let that concrete achieve some strength first, just enough to avoid spalling. Given it's a sill plate, would seem you'll have a lot of pull out forces, but would be nice to know you have the fastener value needed for the load, given it is what holds the framing to the foundation.
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Today's Featured Article - Product Review: Electronic Ignition - by Staff. Oil, for example has come a long way in the last 50 years and I don't use anything but the latest API grade available. I've heard the arguments for non-detergent oils but would never trade it for today's formulations. Paint is another, the modern acrylic enamels are great for resistance to grease and fuel stains, retaining their shine and they last forever; unlike enamels and lacquers . Still another is the alternator. No doubt using the original generator keeps the tractor pure, but for thos
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