Hardwood or Softwood visual grading standards define rules, as to the types sizes and ...Source : <a href="http://mirkostrade10.sydneyinstitute.wikispaces.net/file/view/Timber%20Products.pptxTRAIL">http://mirkostrade10.sydneyinstitute.wikispaces.net/file/view/Timber%20Products.pptxTRAIL</a> BRIDGE INSPECTION AND CONDITION ASSESSMENT MODULE 3 ...