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E. <br />2. Stop placing concrete when the quantity of rain falling on the surface <br />is sufficient to wash the concrete surface. <br />3. Concrete shall have a maximum placing temperature which will not <br />cause difficulty from loss of slump, flash set, or cold joints. <br />4. The temperature of concrete as placed shall not exceed 95 degrees <br />F, except the temperature of concrete placed in walls and slabs <br />three feet or greater in thickness, shall not exceed 90 degrees F. <br />When the temperature of the concrete reinforcement is greater than <br />120 degrees F, spray with water immediately prior to placing <br />concrete. <br />5. Details and methods of placing and handling concrete during how <br />weather shall be in accordance with ACI 305. <br />Protection from Injury: <br />1. During the curing period, protect concrete from damaging <br />mechanical disturbances, such as load stresses, impact, and heavy <br />vibration. Protect concrete surfaces from damage by construction <br />equipment, materials and methods, by curing methods, rain, or <br />running water. <br />2. Do not load self supporting structures in such a way as to overstress <br />the concrete. <br />3. Do not permit gunpowder or other power driven fasteners to be used <br />in concrete. Use drilled, metal shielded bolts only unless <br />predetermined and approved by the Engineer. <br />END OF SECTION <br />07/06 03300 -22 05 -5564 <br />