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,. ,. . . . . _. . :F-,t ,rir. : a_� _ a. • � ' e _. . <br /> ��eCl' a�, O� � I <br /> GPNf'P-OS-121�l <br /> "I'o ccnnply with thc 2003 IAC, thc altcrations need to includc thc <br /> reinforcement of or hridging around 271 lightly loadcd elemcuts and 95 <br /> heavily IoaJed cicmcnts; even though it is likely lhat many of thcsc lighdy <br /> IaadeJ cicnums may mcct thc 2003 LBC. 7'his appruuch seems countrr- <br /> � pruductivc, ax it reinforccs lighdy loaded clemcnts anJ ignores lhe mn;ority o( <br /> thr hrrvily loa�ic� clementti. \Vc cstitnate the cost of rcinf'orcing or hridgin+� <br /> BOE/NG ���� ��� Iighlly loadcd clrments to bc at Icatit �I SO,UOO lo$300,000. <br /> 3. ��dopting lhe 2003 1L'DC (or stn�ctural alter.Uions wiU alluw I3oeing lu <br /> ;ipproach the upgrade of the Inler�l system in ;i much more systematic and <br /> cunsistcnt manner. Bocing has agreed [o a voluntary upgradc of the tcnsion- <br /> onh� br:�cing syslem in the walls of tlic sui�cmre. This �aill significandy <br /> inqnovc the huilding's seismic per(onnance. Boeing has chosen ta Acsign this <br /> ��oluntary upgradc to resist a ntinimum of 7590 of thc 2003 IQC seismic <br /> forces. This is Ihe force levrl Ihat would (ic rcyuired by the 2003 i�BC if the <br /> �cismic b;�se shear had incrcased by ntorc thim 5%. <br /> "fhis apprn:ich is cunsistent with good engineering design practice, and will <br /> address n;ost of Ihc hravily loaded cicments which miFht otherwise be <br /> ignured. <br /> •1. A complelr stnicturnl analysis has bern made lo cnsurc the altered buiWing <br /> ��ill bc in full compli.mce �vith thc 2003 IIIC I'or all vcrtical load <br /> cuiubinatiuns. <br /> \1'r a�,�,reciate ��ow considera�ion of this reyuect.and ���e louk funvard to your <br /> rarlicst respunsc. If you havc any yucstions or �dish to discuss this furthrr, pleasc <br /> call mc at any tituc. <br /> Sinccrcly, <br /> //�// /, r� �! <br /> ^1'� {`�~� / / <br /> �./ <br /> �111'�: ��. f'IC��Ci1111�7 )f. <br /> Ci�ic :�flairti Munager <br /> Thc }3ocing Company <br /> ��1�5�3.1'_S3•13 <br /> � � <br /> a�ti <br />