Laserfiche WebLink
SeptemUer30,2009 <br />Project Na: 'I'-6366 <br />3A [BC Seismic Pnramcici•s <br />Dased on the soil couditions encountercd nnd Ihc local gcolopy, per �he 2006 Luemational I3uilding Code{IBG) <br />the sitc would fall into seismic si�e class "C.^ With this site class„per tlic 200G IBC, [he following seismic <br />pai.vnetcrs should Uc uscd in design. ' <br />Seismic I)csign Parameters (dBC 2006) <br />Spcctr.il respunse acceleraiinn (Shori Period); S, , <br />Spectral response accelcraliou (I-Sccond Period), Si <br />Sitc cocflicicnt at Shiul Pcriods, P, <br />Site cncf�cicnt al 1-Secoiid Periods, I�� <br />l�ivc percent damped 0.2-second period, S�S <br />Tive licrceN dampe�l 1-second period, Spi <br />� I?06� <br />0.42? <br />I .000 , <br />1.378 <br />O.R04 <br />4.388 <br />� <br />Valucs bascd on Lalihide 47.9] 2N and l.ongilude -122.213)V, t�ken Gom Growid Motion Paramctcr C�Iculator <br />accessed 9/23/2009 on the web sitc htip://cailh uakc.uses.govlresearch/hazmaps/desicn/index.y�l�� <br />4.0 llTSCUSSION AM) RLCOMhiGNDA1'IONS <br />J.1 Genrrnl • <br />13,�sed ov.dur study, there me no gemecl�nic31 conditions tlmt would preclude re-deyelopment of thc sitc: T1�c <br />building cat� bc supportcd oi� convenlional spread footings Uearing on competenl nalive soils or ou thc cxisting <br />dcnse stnictu�al fill: 1'loor slabs m�d pavemcnts can �e similady supported. <br />The granular fill obscrved :�I lesl U0�'u�os B-2 and B-3 is relatively frec of fincs and should be suitable for re-use <br />as fill material ti�om sile crcavalions dminE most weatlier conditions. '17ie undedyiug nn�ivc glacial lill soils <br />however, contain a suffiicicnt amoun( of fin�s (sill- and clay-c�Zed p.irlicles) tlint will makc compaction to <br />st�uctural fill standards diCficult if lhc soil is ino wct oi' loo dry. Accordingly, Qic ability lo use thc soils from <br />site excavations as suvciural fill �vill depend on their moisture contcnt and the prevoiling wcatl�er condilions at <br />the time of coustruction. If grading actiyities �yill lake place during the winter season, the o�vner sLould Ue <br />prcparcd lo import frce-draining granular m�!crial for use as sl�tictural fill andb�ckfill: . <br />Delailcd recommcndations regarding these issues and od�er geolcclmical desian considera�ions are provided in <br />tlie following sections of Uiis repoii. Thcsc rcconmicndatimu should �e i�icorporated into Ihe. final design <br />di�wings and conslivction spccificalions. <br />4.2 Site Prennrntion and Graclini <br />Site preparation'u�ill rcquirc remcval of dic c�istine �splialt pavem�nt. U� �ddition to pavement removal <br />eais�ing utilitics iu �lic building footprint tl�at will remain in use should be re-routed to avoid undcrlying <br />1 <br />/ <br />Page ro. 3 <br />