by R Driscoll (01-Jan-1995)
Discusses the assessment and classification of visible damage resulting from structural distortion. Includes a table classifying cracks from category 0 (hairline cracks of less than about 0.1mm width) to category 5 (cracks usually greater than 25mm width). 8 pages.
Out of print so a photocopy or print-out from a pdf may be supplied. Unfortunately the photographs are not very clear when reproduced in this way.