On Feb 18, 9:21*pm, (Andrew Gabriel)
wrote:

If it doesn't have the odd saw cut, drilled hole, paint splash, etc,
it hasn't really been used...

My big trestles are made from 10"-12" timber, with no steelwork
guaranteed to be anywhere near the top surface. I can put a circular
saw clean through them, knowing there's nothing in there to hit. It
makes it a lot quicker to work. Eventually (which will take longer
than you might think, at current erosion rates) I just make some new
ones.