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Gateway Park Center PERKINS+WILL <br /> 810495.00 <br />12/06/18 <br />033000-30 Cast-In-Place <br />Concrete <br />7.Seal around pipes and other penetrations with compatible trowel mastic. <br />8.The vapor barrier must be approved prior to concrete placement. <br />3.2 JOINTS IN CONCRETE <br />A.Locate construction and contraction joints as indicated on Drawings and on <br />approved joint location submittal. <br />1.Do not use contraction joints in framed floors or composite slabs. <br />2.Locate and install construction joints so they do not impair strength or <br />appearance of the structure, as acceptable to Design Professionals. <br />3.Coordinate location of construction and contraction joints with locations of <br />joints in finish materials where they exist. <br />a)Construction and contraction joints in slabs or slab on grade with <br />terrazzo finish must be reviewed and approved by the Design <br />Professionals. <br />4.Maximum joint spacing is as indicated on Drawings. <br />B.Construction Joints: <br />1.Construction joints shall be located within the central third of the span. <br />Any concrete spilling over or through the bulkhead shall be removed at <br />the completion of the pour. All surfaces of the concrete shall have <br />reinforcing extending through the joint. <br />2.Horizontal Joints: Horizontal construction joints other than those shown <br />on the Drawings will not be permitted unless approved by the Architect. <br />3.Joint Preparation: Forms shall be removed in time to permit roughening <br />of construction joints of structural members by chipping and wire brushing <br />to remove all loose and foreign material and roughen as indicated on the <br />Drawings. The existing concrete at joints shall either be (a) dampened to <br />the point that the surface is saturated, but all standing water has been <br />removed, promptly followed by placement and vibration of fresh concrete, <br />or (b) not required to be dampened, with one of the specified bonding <br />compounds applied as appropriate for the joint condition, following <br />manufacturer recommendations, with placement and vibration of fresh <br />concrete to follow while the epoxy bonding agent is still tacky. Joints <br />without epoxy bonding agent require fresh concrete with slump 7 inches <br />(180mm) or greater at horizontal joints, and fresh concrete confined to <br />maintain pressure against the joint at vertical joints. Where such <br />conditions are not present, or where applying water to dampen the <br />surface is impractical, use epoxy bonding agent suitable for dry surfaces <br />C.Isolation Joints: <br />1.Interrupt structural continuity resulting from bond, reinforcement or <br />keyway at points of contact between slabs-on-grade and vertical <br />surfaces, such as column pedestals, foundation walls and other locations, <br />as indicated.