Had that problem in an old school building. Had to put in the anchors for a
drop ceiling, Ended up drilling every one.
Karl


"carl mciver" wrote in message
ink.net...
"Ignoramus677" wrote in message
. ..
| I am confused as to what happens when concrete nails are shot into
| concrete with nail shooting guns. Why don't the nails get bent? Where
| does the concrete that is displaced from the hole, go? Why would the
| incompressible nail hold in incompressible concrete and not fall out
| of its hole?
|
| i

If the concrete is a day or two old you can use a regular carpenter's
hammer, and for the next three weeks or so a power nailer will do just
fine,
but after a few years you'd likely be better off boring holes. That's
pretty much been my experience, but YMMV.