Re: [SG] Buildings

If you need concertina coils go to the craft store and buy some wire for

stringing beads, get a three quarter inch d0owel rod and wrap it tight
around 
the dowel. Once you have the coil made stretch it a little, double it
with 
another coil and you have the inter-woven contertina coils that work
best. 
You can stretch the wire between wire posts attached to a base for razor
wire 
strands.