John Wakefield wrote on Sunday (25/01/2004) :
What's the best thing to use for this? Sledgehammer or some sort of power
tool?

It depends how substantial the concrete is. It becomes easier once get
a working edge. A substantial steel bar to lift an edge up and then a
good wallop with a sledge will quickly break it up for you.

--

Regards,
Harry (M1BYT) (Lap)
http://www.ukradioamateur.org