Annex 2C: ROCOND 381 METHOD This item is rated over ten joints within the selected single lane beginning at the start of the 50 meter gauging length. (Refer to “Procedure for Rating” in selection 2.5) Two width measurements must be taken for each of the ten joints. A measurement is taken at the 1/3 point and 2/3 point along thelength of the spalling on the joint. Where spalling appears at both ends of the joint, on each side of an unspalled length, a width measurement is taken at the center points along the length of the two spalls. If thee are more than two areas of Spalling on a single slab, then the average width of all the spalls must be recorded in both width columns. When a joint is not spalled, two width measurements of “0” mm are to be recorded. There will always be 20 width measurements obtained from 10 transverse joints. When measuring the width of spalling at joints, the width of the joint gap is not included. When assessing Longitudinal joints only the Spalling in the lane being assessed is considered. See diagram on following page. The length of spalling at each joint is recorded in meters. Where two or more lengths of spalling occur on the one joint, all lengths ae combined. At any joint with no spalling, a length of “0” meter is recorded for the “extent” calculation. For each joint both width measurements and the length measurement must be 0, or all three measurements must be greater than 0. It may be necessary to continue beyond the end of the selected 50m gauging length to encounter ten occurrences of transverse joints. Where the joints are covered by asphalt concrete overlay, the condition of the underlying pavement cannot be assessed and this should be recorded under the rater’s comments.