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DocuSign Envelope ID: 313DA256 -1EDE- 4396- A716- 4C53B809027E <br />JERRY M. PASSMORE CENTER ADDITION AND RENOVATION <br />HILLSBOROUGH, NORTH CAROLINA <br />C. Accurately position, support, and secure reinforcement against displacement. Locate and support <br />reinforcement with bar supports to maintain minimum concrete cover. Do not tack weld crossing <br />reinforcing bars. <br />1. Shop- or field -weld reinforcement according to AWS 131.4, where indicated. <br />D. Set wire ties with ends directed into concrete, not toward exposed concrete surfaces. <br />E. Install welded wire fabric in longest practicable lengths on bar supports spaced to minimize sagging. <br />Lap edges and ends of adjoining sheets at least one mesh spacing. Offset laps of adjoining sheet <br />widths to prevent continuous laps in either direction. Lace overlaps with wire. <br />3.6 JOINTS <br />A. General: Construct joints true to line with faces perpendicular to surface plane of concrete. <br />B. Construction Joints: Install so strength and appearance of concrete are not impaired, at locations <br />indicated or as approved by Architect. <br />1. Place joints perpendicular to main reinforcement. Continue reinforcement across construction <br />joints, unless otherwise indicated. Do not continue reinforcement through sides of strip <br />placements of floors and slabs. <br />2. Form from preformed galvanized steel, plastic keyway- section forms, or bulkhead forms with <br />keys, unless otherwise indicated. Embed keys at least 1 -1/2 inches into concrete. <br />3. Space vertical joints in walls as indicated. Locate joints beside piers integral with walls, near <br />corners, and in concealed locations where possible. <br />4. Use a bonding agent at locations where fresh concrete is placed against hardened or partially <br />hardened concrete surfaces. <br />5. Use epoxy- bonding adhesive at locations where fresh concrete is placed against hardened or <br />partially hardened concrete surfaces. <br />C. Contraction Joints in Slabs -on- Grade: Form weakened -plane contraction joints, sectioning concrete <br />into areas as indicated. Construct contraction joints for a depth equal to at least one -fourth of <br />concrete thickness, as follows: <br />1. Sawed Joints: Form contraction joints with power saws equipped with shatterproof abrasive or <br />diamond - rimmed blades. Cut 1/8 -inch- wide joints into concrete when cutting action will not <br />tear, abrade, or otherwise damage surface and before concrete develops random contraction <br />cracks. <br />D. Isolation Joints in Slabs -on- Grade: After removing formwork, install joint - filler strips at slab <br />junctions with vertical surfaces, such as column pedestals, foundation walls, grade beams, and other <br />locations, as indicated. <br />1. Extend joint - filler strips full width and depth of joint, terminating flush with finished concrete <br />surface, unless otherwise indicated. <br />2. Terminate full -width joint - filler strips not less than 1/2 inch or more than 1 inch below finished <br />concrete surface where joint sealants, specified in Division 07, Section "Joint Protection," are <br />indicated. <br />CAST -IN-PLACE CONCRETE 033000- 10 <br />