A lot of ya'll have some darn good arguments about putting the screw on top of the conduit as opposed to under it. Around here, it's rare to see the screw above the conduit. The reason being is if the strap, for whatever reason, deforms out of shape, the screw will still be there to support the conduit and keep it from falling. There was mention about the screws coming loose, but case in point I have seen a scrap piece of 3" RMC fall from a guys lift, hit the 3/4 EMT straped to the wall (using one holes with a toggle bolt below the conduit), and bend the strap into submission, but the toggle bolt held way. Of course the strap had to be relaced, as with the piece of EMT that was banged up. A rare event, something falling from a lift
. Or you get the guys that are so poor at bending conduit that the straps are the only things keeping it plumb and level. And then years later demo that crooked piece out, and it has so much tension on it that it springs out from the wall :grin: