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PGSF WMVD Storm and Combined Sewer - Construction Package 2 Cast-in-Place Concrete <br />Project No. 180162 03 30 00 - 18 <br /> <br />3. Provide nailing blocks, plugs, strips, and the like necessary for the attachment of <br />trim, finish, and similar work. Voids in sleeves, inserts, and anchor slots shall be filled <br />temporarily with readily removable material to prevent entry of concrete. Do not use <br />continuous anchor slots or strips in concrete intended to be watertight. <br />4. Position operators or sleeves for gate or valve stems to clear reinforcing steel, <br />conduit, and other embedments, and to align accurately with equipment. <br />3.08 EXPANSION JOINTS <br />A. Expansion joints shall be as shown. Do not extend reinforcement or other embedded <br />metal items through expansion joints. Provide waterstops where indicated. <br />3.09 WATERSTOPS <br />A. Waterstops shall conform to ACI 301. Tie waterstops in position prior to placement of <br />concrete to prevent movement and deformation. <br />B. Provide waterstops in construction and expansion joints as follows: <br />1. Joints in parts of structures exposed to ground or water on one side and occupied by <br />non-submerged equipment or by personnel on the other. <br />2. Wall and slab joints of tanks and channels subject to water pressure. <br />3. Waterstops shall be provided for the full height of the walls. <br />4. Provide at other locations shown on the Drawings. <br />C. Field splices shall be at straight sections using heat fused welded, butt splices only. <br />Lapping of splices or joining by means other than heat fused welding is not allowed. <br />D. Install hydrophilic waterstops according to manuacturer’s recommendations. Surfaces of <br />concrete shall be prepared level/plumb and to the smoothness required by <br />manufacturer. Grind surface as necessary. Provide bonding adhesive and concrete nails <br />with fender washers to hold waterstop in position during concrete placment. <br />3.10 MODIFICATION OF EXISTING CONCRETE <br />A. General: <br />1. Verify structural dimensions related to or controlled by previously constructed or <br />existing structures prior to concrete work. <br />B. Cutting or Coring Concrete: <br />1. Saw cut concrete to a depth of 3/4 inch to form straight outlines of concrete areas to <br />be removed. Where reinforcement is exposed due to saw cutting or core drilling and <br />no new material is to be placed on the cut surface, provide a protective epoxy coating <br />to the entire cut surface. <br />2. Coat surfaces of oversized openings with an epoxy bonding compound prior to re- <br />finishing with profiling mortar to the required opening size. <br />3. Grind existing joint edges to create a chamfer matching those used on adjacent <br />construction.