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C <br />Dlr. Kenneth W. Callahan <br />Page Three <br />September 21, 1981 <br />5. Per our discussion regarding ehe previous Schmidt Ilammer tes[ing of the <br />round corrugated pilaster., it dues not appear practical to attempt fureher <br />tes:i.ng of the pilasters by this method. ]n most cases iC appears from the <br />surface finish of these p-ilasters that ndequate consolidation was achieved <br />by the methods which were used. Any pilaster arcas which have excessive <br />rock pockets shall be patched with grout. <br />6a)66) No Eurther comment is required. <br />6, c) lJe have observed panel Nos. 65, b6 6 G7 afCer Uackfill was placed and saw <br />no distress in the panels. <br />7. No further comment is required <br />8. No further comment is required <br />9. We understand [hat soils inPormation is being provided by [he soils engineer. <br />10. ReEer to item i12, <br />11. No fur[her comment is recuired. <br />12. Refer to item i;2. <br />The fo].lowing are additional iteras which require expl.ana[.i.on, addi[ional details or <br />corrective action. <br />13. 'I'he ends of [hc firewall panels on grid H at gri.ds 1&].3 musC be supported <br />on a concrete pier in a�cordaitee !oich [he detail on sheet SKS. <br />14. 'Che tilt u�,� pancls havc Ueen damagcd where Che bear on thcy footings at L'he <br />[ollowing lomtions; A-13, A.5-13, ll-13, IS.S-13, C-13, C.5-13. <br />Some of the concrete on thc surfaces of thc panels has spalled oft, Apparently <br />high bearing sCresses on shims and latcra]. prying of LI�e bol'toms of the pancls <br />far al.ignmenL• caused the dnmage. See 51:-G Eor repai.r method. At the site <br />we discussed the possiUility o[ simil.�r damage aC ocher locations which are <br />no ].onger exposed. Prior to Uackfilling al.ong grid ]., I oUserved Cl�e Uase <br />oE the tilt-up panels, lJliil.e I was not specifically looki�g for such damage <br />I would liave no[iced any Ciiat was signif.icanC. Aftcr our meeCing at tlie <br />siCe I walked along grid L"t, wherc all Ucaring conditions aere exposed, and <br />saw no significane damage except at the loc.�Cians previously noCed. We do <br />noC fecl thaC fi�r[her ef[orts Co ntL'empt to verity the adequacy of the condi- <br />tions along grid 1 are necessary. <br />15, a) 1'ipe column maCerial tvas purchased in 20' 1engCl�s. Shorl' pieces varying in <br />length to up Co aUout 1'-6", acre wclded onCo Che Uottom ot the 20' pieces <br />Co achieve the praper lengtl�s. 7'he welding was inspected. In mosC cases ! <br />Chc c�Cension ivas sligliCly out ot: :ilignmenC wiCh Che 20' section. 'Phis •_� <br />