Vol 2 - Garney Construction

4. Consider beams, girders, brackets, column capitals, and haunches as partof floor or roof system and place monolithically with floor or roofsystem.5. Should placement sequence result in cold joint located below finishedwater surface, install waterstop in joint.H. Minimum Time between Adjacent Placements:1. Construction or Control Joints: 7 days unless otherwise specified.2. Construction joint between top of footing or slab, and column or wall:As soon as can safely be done without damaging previously castconcrete or interrupting curing thereof, but not less than 24 hours.3. Expansion or Contraction Joints: 1 day.4. For columns and walls with a height in excess of 10 feet, wait at least2 hours before depositing concrete in beams, girders, or slabs supportedthereon.5. For columns and walls 10 feet in height or less, wait at least 1 hour priorto depositing concrete in beams, girders, brackets, column capitals, orslabs supported thereon.I. Consolidation and Visual Observation:1. Consolidation Equipment and Methods: ACI 301.2. Provide at least one standby vibrator in operable condition at Site priorto placing concrete.3. Provide sufficient windows in forms or limit form height to allow forconcrete placement through windows and for visual observation ofconcrete.4. Vibrate concrete in vicinity of joints to obtain impervious concrete.J. Hot Weather:1. Prepare ingredients, mix, place, cure, and protect in accordance withACI 301, ACI 305.1, and as follows:a. Maintain concrete temperature below 95 degrees F at time ofplacement, or furnish test data or other proof that admixtures andmix ingredients do not produce flash set plastic shrinkage, orcracking as a result of heat of hydration. Cool ingredients beforemixing to maintain fresh concrete temperatures as specified orless.b. Provide for windbreaks, shading, fog spraying, sprinkling, ice, wetcover, or other means as necessary to maintain concrete at orbelow specified temperature.2. Concrete Curing: As specified in Section 03 39 00, Concrete Curing.CAST-IN-PLACE CONCRETEPW/WBG/38205903 30 00 - 14 AUGUST 15, 2012©COPYRIGHT 2012 CH2M HILL