Do wires need to be flat. I was running 12/2 along my joists...and when I pull the wire from the coil, it has a natural twist to it. My perfectionist side says to untwist them so the romex lays flat along the joist along its entire run, but this has been frustrating at best.
I know the concrete is supposed to reach it's rating in 28 days ie - 3000psi concrete takes 28 days to reach that rating, but to wait that long to drive on it seems rediculous.He has a Mustang in storage that weighs 3200lbs and I figured he'd be fine driving it across the driveway into the garage after a week of cure.e: When to drive on new concrete driveway? My guy asked for seven days for driving cars and not to actually park on it until 14. 28 days is to keep heavy contractor trucks from using it.
Concrete will never fully cure; it continually hardens forever, although for all practical purposes, it reaches a point where further hardening will be so slow as to unnoticeable. Unless the mix has retarder (or some cement replacement material) in it, it will generally be hard enough to walk on in less than 24 hours. Mixes are usually specified with a design strength - the compressive strength that the concrete will reach in a period of time, typically 28 days. As a general rule, at 7 days it will have reached around two thirds to three quarters of the design strength. Don't worry about the water on the new concrete - it will help the concrete cure if it is kept damp after the initial set. The early stages of concrete curing is the hydration of the cement in the concrete.