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SENT 9Y: SCHOLTEN ROOFINO INC; 3803982857; AlAR-2-05 1 :42P�; PAOE 2 <br /> 03/02/2005 14:24 FAX 426 197 IA21 DIBBLE-ENGINEERS �001/001 <br /> Dd�� i Z- U3�1 <br /> Structural <br /> DIBBLE ENGINEERS, INC. Review <br /> Professional Suuctural Englnaaring Services <br /> 11�semo <br /> llA7�E: March 2,2005 JOB#: OS-037 <br /> TO; Beay Berendsen, Scholten Rooflng FAX#: (360)398-2857 <br /> CC: Robb Dibble, P.E., File <br /> FR(�M: Kurt Zimmers <br /> PRO.fECT: Everett Re•roof Review <br /> NO. OF?AGES (Including Cover): 5 _,. <br /> CUMMENTS: <br /> Dibble Engineers preformcd a site visit to the renovation project si�c et 3105 Pinc Sveet in <br /> Everett, VJashinaton to review the existing condicions and the as-built building plans for the <br /> proposcd re-roofing of the npproximntely six story concrete sm�cture. <br /> It ls Dibble Lngineers' understanding the new Tooting matedals will6e installed over the two <br /> existing layers of toofing. For our review,the cantracror provided loed info[maHon of 1,1 PSF <br /> maximum weight for the new roofing s,ystem and s total of 7.R PSF fnr the exisdng roofin¢ <br /> luyers. The existing conditions were determined by core drilling su�d wetghing the snmple.The <br /> exi'sting hollow core plank[oof svucture wa� verifiul by uur rcviaw of us-bwll building pinns <br /> provided by the contractor for viewing while on-sita. <br /> Uur calculations indicete a 74.2 PSF lotal dead lond for the existing conditions. With the wei¢ht <br /> of the new rooflug system install:.d over ihe exisdne roofing, lhn total Jr.xd Ioad wip bc 753 PSF <br /> for a total increase of 1.4%. Further review indicates that S"hollow core plenks spamting 26',as <br /> in this case,have approximately a superimposed loed capaoity of 51 PSF which is more then the <br /> 18,3 PSF total superimposcd load with the ne�v mof. <br /> ln summazy, it is our optton that ins[alling the new , <br /> roofing system over the existing roofing layers is wi ��r Q,� ' D 6e <br /> acceptable increase of load for this shucture. � Q.,�F.° �'c•<<C, <br /> �ibble Lngineers' review is specific ro the addressed � � � � <br /> compoiienta and did not perform any evaluation af the <br /> existing strucluro beyond the scope of this memo. �0,�!RF��S?���0 \�av <br /> P1ea5e contact us with any questions or clariflcations. � ss'�N.qL kN`, y2�� <br /> periREs i;o2i O[e � ' <br /> 25 Canh'a!fVuy. Suiru d00 Yugo ! rj( P. II3.88l.l900 <br /> KlrklanA, iVA 980lJ F, J21-l97J9?l <br />