SR99 Bored Tunnel-Assessment of Settlement Impacts ... - SCATnow

cladding systems should receive special assessments prior to construction. Theseassessments should include a more detailed structural analysis than was performed inthe current study in order to determine if the expected building frame deformationscan be tolerated by the cladding system. In addition, for these same buildings, acondition assessment of the building cladding system should be conducted todocument the pre-tunneling condition of the cladding system.6.6 Summary of Building Damage Prediction along Tunnel AlignmentThe following table summarizes the findings of this assessment for each buildingalong the tunnel alignment. The table includes 1) an opinion of the existingcondition for each building utilizing the B&C damage classification system providedin Section 5.1; 2) the calculated B&C damage classification; and 3) an opinion of thepotential damage classification based upon a qualitative review of each building. Thequalitative evaluation utilizes the B&C damage assessment as a baseline and makesqualitative adjustments in either the positive or negative direction. The adjustmentsare based upon those items outlined in Section 3.6.A number of the buildings along the tunnel alignment have historic statusdesignation. South of Columbia Street the buildings, as well as the areaway adjacentto building T253, are a part of the Pioneer Square Historic District. Where thetunnel alignment changes direction near Stewart Street, several of the buildings arewithin the Pike Place Market Historic District. In addition, a number of thebuildings, or specific elements of the buildings, are designated as either federal, state,or city landmarks. Table 4 below identifies those buildings with historicdesignations. Specific information regarding these designations is noted on theBuilding Assessment Forms in Appendix C.The final column in the table was utilized to develop guidelines for monitoring theindividual buildings during construction. The guidelines for each building werebased upon the damage classification determined by the B&C analysis, the existingcondition of the building, and the use and occupancy of the building. See AppendixE for more information on the monitoring level guidelines.The Alaskan Way Viaduct & Seawall Replacement Program March 2010Proposed SR 99 Bored Tunnel - Assessment of Settlement Impacts to Buildings 28Public Disclosure Request 11-0123 for Elizabeth Campbell - 2nd installment