KaBOOM! Forums

Hi Tim.

The best way to measure your Engineered Wood Fiber depth is to take a piece of grid paper and map out the playarea shape on paper. Use a long handled screw driver marked with a piece of tape at the 12" mark. Take depth readings every 10'-12' or so. Mark these on your grid paper and you'll be able to see what depths you have where in the playspace. If you are low in some areas and high in depth in other areas, you can redistribute the material with a metal rake or pitch fork (the light plastic pitch forks are great for this). Use a wheelbarrow or tarp for  moving the wood fiber around. Let me know how you did!
Joy

Thank you all  for the input.  My concern was finding the test method that would yield the greatest result and be in line with the ASTM guide lines.  The idea of probing sounded good but there are two very important variables; size/shape of the probe and more important pounds/sq/in.  I had also sent out requests to other agencies and the preferred method turns out to be holes where both the thickness of the material and the substrate can be seen and measured. (as per national program for playground safty and the book S.A.F.E Play Areas.