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Gateway Park Center PERKINS+WILL <br /> 810495.00 <br />12/06/18 <br />033000-15 Cast-In-Place <br />Concrete <br />ii.Strength level of concrete will be considered satisfactory <br />provided averages of all sets of three (3) consecutive <br />strength test results (i.e. moving average) equal or exceed <br />specified 28-day strength, and no individual strength test <br />result falls below specified 28-day strength by more than <br />500 psi (3.5MPa). <br />iii.If strength tests fail to meet minimum requirements, <br />concrete represented by such tests shall be considered <br />questionable and shall, if deemed appropriate by the SER, <br />be subject to further evaluation by core testing as specified <br />herein or other testing methods. <br />c)Conduct core tests on questionable concrete in accordance with <br />ACI 318 and ASTM C 42. <br />i.Location of cores shall be coordinated with Design <br />Professionals so as to least impair strength of structure. <br />Before testing cores, discard and replace any that show <br />evidence of having been damaged subsequent to or during <br />removal from structure or which have reinforcement <br />present. <br />ii.Cores from structure exposed to soil or constant moisture <br />in service (e.g. basement walls, retaining walls, slab-on- <br />grade, piers, footings, etc.) shall be tested in a fully <br />saturated condition. Cores for all other concrete may be <br />tested dry. Prior to commencement of coring, verify with <br />Design Professionals whether cores are to be tested wet or <br />dry. <br />iii.Fill core holes with low slump concrete or mortar with a <br />strength equal to or greater than that specified for area <br />cored. <br />d)Concrete in area represented by core test will be considered <br />adequate if average strength of cores is equal to at least 85% of, <br />and if no single core is less than 75% of specified strength. <br />5.Floor flatness and levelness tolerance compliance testing is to be <br />performed within 72 hours of concrete placement by Owner’s Testing <br />Agency, and prior to the removal of shores and forms. <br />F.Owner’s Testing Agency shall submit for record inspection, observation, and/or <br />test reports to the Owner and Design Professionals, as required herein and shall <br />provide an evaluation statement in each report stating whether or not concrete <br />placement conforms to requirements of Specifications and Drawings and shall <br />specifically note deviations therefrom. <br />G.Immediately report deficiencies to the Contractor, Owner and Design <br />Professionals.