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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br />REINFORCED MASONRY <br /> 04 22 13 - 10 <br />3.10 REINFORCED UNIT MASONRY INSTALLATION <br />A. Temporary Formwork and Shores: Construct formwork and shores to support <br />reinforced masonry elements during construction. <br />1. Construct formwork to conform to shape, line, and dimensions shown. Make it <br />sufficiently tight to prevent leakage of mortar and grout. Brace, tie, and support <br />forms to maintain position and shape during construction and curing of <br />reinforced masonry. <br />2. Do not remove forms and shores until reinforced masonry members have <br />hardened sufficiently to carry their own weight and other temporary loads that <br />may be placed on them during construction. <br />B. Placing Reinforcement: Comply with requirements of ACI 530.1/ASCE 6/TMS 602 and <br />as follows: <br />1. Place reinforcement and accessories as indicated. <br />2. Support and fasten reinforcement together to prevent displacement by <br />construction loads or by placement of grout. <br />3. Clean reinforcement by removing mud, oil, or other materials that will reduce <br />the bond at the time grout is placed. Reinforcement with tightly bound rust <br />and/or mill scale is acceptable without cleaning provided the dimensions and <br />weights, including heights of deformations, of the cleaned sample are not <br />reduced. <br />4. Place all reinforcement prior to grouting. Tie vertical reinforcement to dowels at <br />base of masonry with tie wire and thread masonry units over or around <br />reinforcement. Support vertical reinforcement at 10 feet o.c. Extend vertical <br />bars the specified lap length above top of pour and support bar in proper <br />position at top of grout pour. Where vertical bars are placed after laying <br />masonry, place wire loops extending into cells as masonry is laid and loosen <br />before mortar sets. After insertion of bar, pull loops and bar to proper position <br />and tie free ends. <br />5. Do not bend reinforcement after it is embedded in grout. <br />6. Splice bars only where indicated. Provide 48 bar diameter lap splices, unless <br />otherwise noted. Place bars in contact and wire tie. Bars spliced by noncontact <br />lap splices shall be spaced 6 inches apart (maximum). <br />7. Bar placement tolerance is ±1/2 inches perpendicular to wall and 2 inches along <br />wall. The clear distance between parallel bars that are not contact lap spliced <br />shall be not less than 1 inch in walls and 1-1/2 inches in columns and pilasters. <br />Maintain ¼ inch clear between bars and any face of masonry. <br />C. Laying Masonry Walls: Construct masonry walls as follows: <br />1. Lay masonry units to top of grout pour prior to placing grout. Maximum grout <br />pour height is 12 feet or top of bond beam, whichever is lower. <br />2. Construct wall such that vertical cells to be grouted are aligned and <br />unobstructed openings for grout are 3 inches x 4 inches (minimum). Construct <br />grout spaces free of mortar droppings, debris, loose aggregates, and any <br />material deleterious to grout; or, clean the cells prior to grouting. Remove <br />masonry protrusions extending 1/2 inch or more into cells to be grouted. <br />3. Do not lay masonry until grouted masonry below is cured.