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Attachment D <br />B. Bedding layer: <br />1. Spread and evenly screed the bedding aggregate in 2-in(50 mm)lift as noted in the Drawings. <br />2.The surface tolerance of the screeded bedding layer shall be ±1/4- in(6.4 mm) over a 10 ft (3 m) <br />long straightedge. <br />3.Do not subject screeded bedding material to any pedestrian or vehicular traffic before paver unit <br />installation begins. <br />C. Permeable Interlocking concrete pavers and joint/opening fill material: <br />1. Lay pavers in Running Bond pattern. Maintain straight pattern lines. <br />2.Fill gaps at the edgesof the pavedarea with cut units. Cut paver units shall be no smaller than 1/3 <br />(one-third)of a whole unit. <br />3.Cut pavers and place along the edges with a masonry saw. <br />4. Fill the openings and joints with aggregate material per ASTM C144. <br />5.Remove allexcess aggregate on the surface by sweeping pavers clean – NO aggregate shall <br />remain on paver surface prior to using plate compactor. <br />6. Compact and set the pavers into the bedding material using a lowamplitude, 75-90 Hz plate <br />compactor capable of at least 4,000 lbs (18 kN) centrifugal compaction force. This will require at <br />least three (3)passes with the plate compactor. <br />7. Apply additional aggregate to the openings and joints, filling themcompletely. Remove excess <br />aggregate by sweeping the pavers clean, then compactthe paversagain. This will require at least <br />two (2) passes with the platecompactor. <br />9.All pavers within 5 ft (2 m) of the laying face must be left fullycompacted at the completion of <br />each day. <br />10.The final surface tolerance of compacted pavers shall not deviate more than ±1/4- in(6.4 mm) <br />over a 10 ft (3 m) long straightedge. <br />3.5FIELD QUALITY CONTROL <br />A. After sweeping the surface clean, check final elevations for conformance tothe drawings. <br />B. Lippage: No greater than 1/8-in. (3 mm) difference in height between adjacent pavers. <br />3.6PROTECTION <br />A. After work in this section is complete, the General Contractor shall be responsible for protecting work <br />from sediment deposition and damage due to subsequent construction activity on the site. <br /> <br />END OF SECTION <br />Page 7 of 7 <br /> <br />