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888 MAIN STREET / THORNTON TOMASETTI <br />./. <br />Structural Peer Review Comment Log #1 - 09/14/2018 <br />888 N MAIN ST. & 1665 N SYCAMORE ST., SANTA ANA, CA 92701 <br />DCA <br />STRUCTURAL ENGINEERING <br />Item PC Spec or Dwg Comment <br />NO.Eng.No. / Detail Date <br />Plan Check Comment Response Resolved? <br />10 DCA PG. 57 09/14/18 The note states that the max shear demands are within 10%. Study model shears at inner columns for <br />Some columns appear to vary by greater than 10%. Please Condition A are within 8% percent of those in <br />justify.Condition C. Study model shears at outer <br />columns for Condition A are greater than those in RESOLVED <br />Condition C, making A results conservative <br />there. Overall, Condition A shows reasonably <br />comparable shears to the other conditions, which <br />is the point of the study. <br />11 DCA PG. 58 09/14/18 Moment demands are stated to be within 5%. Some <br />increases are larger than 5%. Please justify. <br />12 DCA PG. 142-143 09/14/18 A total of 8 rebar samples were tested. Per ASCE41-13, <br />and 154-155 Sec. 10.2.2.4.2.3, three samples are required per 3 floors. <br />(Note: page Please justify use of 8 samples. <br />numbers <br />repeat. See <br />second <br />occuance of <br />pg.142) <br />Comment Log <br />The observations provided on Item #10 apply <br />here. Also note the maximum moment demand is <br />used for checking, whether it occurs at the top or <br />bottom end of the member. On that basis RESOLVED <br />Condition A provides maximum moment results <br />reasonably comparable to the other conditions. <br />Analysis results show elements above Level 4 <br />experiencing much smaller DCRs than those <br />between Level 1 and Level 4. So further <br />sampling at upper floors would not change the RESOLVED <br />study conclusions. Also nominal grade values <br />are used throughout, rather than 'actual' values. <br />For these reasons, the samples taken to date are <br />sufficient for this project, <br />Page #3 <br />139& )91