3003 W CASINO RD BLDG 40-41 2019-03-21

Er, .• 600 Q Street.Suite 200 • Sacramento.CA 95811 BUEHLER & BUEHLER tel 916.443.0303 fax 916.443.0313 structural engineers www.bbse.com July 22,2013 Tracy McCoy Liebert Precision Cooling Emerson Network Power 1050 Dearborn Dr. Columbus,OH 43085 Subject: Special Seismic Certification Liebert DS and VS Air Conditioning Units Dear Mr. McCoy This letter constitutes Special Seismic Certification for the Liebert DS and VS Air Conditioning Units limited to the sizes stated in Table 1. The units are seismically certified in accordance with the International Building Code(IBC) 2009,2012, California Building Code(CBC)2010, American Society of Civil Engineers (ASCE) Minimum Design Loads for Buildings and Other Structures, ASCE 7-05, ASCE 7-10, The method of certification is through analysis supplemented by shake table testing. Analysis The analysis has been performed using 3D finite element computer software. The section properties and capacity of each of the frame elements are calculated using CFS 6.0.4 and the 2007 NAS (ASD). The frames are modeled in SAP2000 and all members are assigned the appropriate section properties. Seismic loadings are applied statically in each orthogonal direction and the demands on each frame member is compared to the allowable capacity. The seismic load factors are iterated until the demand on each frame member is within the allowable capacity. Shake table testing data Shake table tests with similar units were used to justify the functionality of the subcomponents. The following units were shake tested: DS 070 Standard unit Sds= 1.0 z/h=1.0, [Clark Testing Lab Report#EL:10247] DS 070 Reinforced unit Sds=2.5 z/h=1.0, [Clark Testing Lab Report#EL:10247] DA125 Reinforced unit Sds= 1.65 z/h=1.0 [Clark testing Lab Report#EL:9954,OSHPD OSP-270-10) Functionality tests were performed for the above noted units and each passed satisfactorily.Any observed structural damage during these tests was considered. The active and energized subcomponents used in these tests are representative of those considered in the analysis and listed in Table 1. The combination of analysis and the shake table testing data has been used to certify the units noted. Certified Unit List Seismic Parameters The below referenced equipment is certified for seismic applications when properly installed, used as intended, and located in United States where the"design 5 percent damped spectral response acceleration at short periods adjusted for site class effects", Sds, is as shown in the Table 1. Below grade, at grade or above grade installations are permitted and included in this approval. rU Page 1 of/ / BUEHLER & BUEHLER structurat engineers