7720 HARDESON RD BASE FILE 2016-01-01 MF Import

� Pir. Kenneth W. Callahan Page Two SeptemUer 21, 1981 c) Uninspecced panels Ii104 6 105 are typical retaining wall panels along grid 7. Panels 102 & 103 which are immediately adjacent and which required identical reinforcing were inspected Che samc day. Tl�e only deficiency noted on l'l�e inspected panels was the omi.s�ion of 3 or 4 ot the horizcntal JS Uars. There is somc question as to whethcr tlie prop,r Uars werc installed prior to the concrete pour. This i.s a relatively small portion of the reinforcing in the wall and since che bacic[ill I�as Ueen placed and compacted Uehind the wall without dis[ress co the �anll we don't fecl that remedial action is required. Note also that Plr, ldally Christopherson ot the 13vcrett 6uilding Department had obscrved Che panels and had pointed ou[ Che missing Uars to the Cascade Testing Laboratory inspecl'or. 2. a) See accompanyi.ng calcula[ion sheets Dl and D2, tJNP-2 Threaded Roct Test, revised details on sheet SK4, and calcula[ion shcets W20 thru W28 which are for the 5-1/2" panels. See also enclosed Adhesive Lngineering Company Technical Data Shects. b) Note that alon� grid H dowcls project out of the panels, on ona side only, into a 1'-0"t wide closure s,ri�,. The plans called for dowels on both sides into a�aider closure stri.p. Since there will be a concrete slaU on each side preven[ing motion of the boctom o[ the panel by direcC compression in �he concrete, additonal clowels are noc required. The closure strips may Ue placed without any reinforcing. 3. To verify the in place s�rength of the concretc in panels Nos. 54, 55, 56, 57, 58, 59, 112, 113, ].14, 115 S 116, Schmid� ilammer 'Cests will be performed on each of these panels. 7'he �ests will be performed by a teclmician from Associated S;ind S Gravel in che comp�ny of an approved special inspector. The special inspecCor shal_1 report the resulcs to all parties who norm�l.ly receive conctieCe Cest reporCs, i.ncludin}; thc livereCl' Iiuildin� Department. and Che Structural L•'nginecr. NoCe thnC Lor Chese panels the required s[reng[h is 3000 psi and that thc cylinders avcraged 4945 psi. 4. Cunversations with Che inspector from Cascacic Tesling T.aUoru[ory l�ave determined thac the area where [he !I8 :1R(j O�I U1C5 wcre reversed was grid N, Uetween gr�ids 7 and 8. InPormation from che conCrncCor sliows che actual field conctition is as indicated on enclosed calcul.ation sheet RSd--12. The lateral forces arc carried by che horizontall.y spanni.ng W111 co grid 7& S. At grid 7 che forces arc L'ransmitCed direcCly ia:o t.io perpendicular re[aining wall as indicated on tlre revised detail 25g�, which is enclosed on sheet S}:7. At grid 8 the forces arc Cransferred through the pilasCer to Che foo[ing. 'Phe step in tl�c Poo[in� 3' norCl. ot' grid 8 makes Che Eaoting where the Uars were reversed useless as ❑ horizonC�lly spanni_ng Ucam. 'fhe calcula- Cions on RW-12, however, sho�a tl�a[ L'I�c fooCi.ng as iC exists, south oP the sCep, is cap�ble of ❑dequaCely distributing the lateral force inCo Che soi.l. No remedial acti.on i.s roquired at Cl�e [owtdation. J J