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CONCRETE UNIT MASONRY <br />04 22 00 - 8 <br />3.5 EMBEDDED ITEMS AND ACCESSORIES <br />A. Construct control joints as masonry progresses. <br />B. Construct chases as masonry units are laid. <br />C. Install pipes and conduits passing horizontally through nonbearing masonry partitions . <br />D. Install and secure connectors, flashing, weep holes, weep vents, nailing blocks, and other <br />accessories as required. <br />3.6 INSTALLATION OF REINFORCING STEEL, WALL TIES, AND ANCHORS <br />A. Install reinforcing steel, wall ties, and anchors in accordance with TMS 602/ACI 530.1/ASCE <br />6 Article 3.4. <br />B. Place reinforcement as detailed on the drawings. <br />1. Support and fasten reinforcement to prevent displacement beyond specified tolerances <br />during construction and grouting operations. <br />2. Maintain clear distances between reinforcement and any interior face of masonry unit or <br />formed surface, but not less than 1/4 in. for fine grout, or 1/2 in. for coarse grout. <br />3. Completely embed reinforcing bars in grout. <br />4. Place reinforcing bars maintaining minimum cover of: <br />a. Where masonry is exposed to weather, 2 in. for bars larger than No. 5, 1 1/2 in. for <br />No. 5 or smaller. <br />b. Where masonry is not exposed to weather, 1 1/2 in. <br />5. Embed joint reinforcement with minimum 5/8 in. cover to faces exposed to weather or <br />earth, and 1/2 in. elsewhere. <br />a. Provide minimum 6-in. lap splices and ensure that all ends of longitudinal wires are <br />embedded in mortar at laps. <br />6. Place reinforcing bars in walls and flexural elements to a tolerance of ± 1/2 in. when the <br />distance from the centerline of reinforcing bars to the opposite face of masonry, d, is <br />equal to 8 in. or less, ± 1 in. for d equal to 24 in. or less but greater than 8 in., and ± 1 1/4 <br />in. for d greater than 24 in. <br />7. Foundation dowels that interfere with unit webs are permitted to be bent to a maximum <br />of 1 in. horizontally for every 6 in. of vertical height. <br />C. Install wall ties in accordance with TMS 602/ACI 530.1/ASCE 6 Article 3.4 C. <br />D. Install anchor bolts as detailed on the drawings and in accordance with TMS 602/ACI <br />530.1/ASCE 6 Article 3.4 D. <br />1. Embed headed and bent-bar anchor bolts in grout. Anchor bolts of 1/4 in. or less may be <br />placed in mortar bed joints at least 1/2 in. in specified thickness. <br />2. Maintain clear distance between anchor bolts and any face of masonry unit or formed <br />surface of at least 1/4 in. when using fine grout, and of at least 1/2 in. when using coarse <br />grout.