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Item 7A Applicant's presentation TDDC Facade Revision ProposalTDDC ASC JUNE 20, 2017 CORGAN CORGAN HW 26 / IRA E. WOODS AVE HW 114 E. SOUTHLAKE BLVD S. KIMBALL AVE SILICON CT. NOLEN DR. AIRPORT COMPATIBLE LAND USE ZONING ORDINANCE 479 PERMIT REQUIRED ACOUSTICS STUDY AIRPORT COMPATIBLE LAND USE ZONING ORDINANCE NO. 479 Ldn 75 noise contour 35 dB of noise reduction must be provided by the building shell Original design (all glass façade) does not meet noise requirements @ 29 Db 6 dB difference = 1.5x louder ORDINANCE NO. 479 NOISE CONTOUR THE ANALYSIS PROCESS RESULTING IN PROPOSED ENVELOPE CHANGES INVESTIGATION AND ANALYSIS Goal to resolve issues with the least amount of visual impact to the exterior Contracted an acoustician to analyze the outdoor-to-indoor noise transmission Investigated envelop interventions Investig ated alternative ceiling materials Investigated alternative glazing systems CONCLUSIONS | RECOMMENDATIONS Recommendation of sandwiching roofing insulation between two Densdeck boards Recommendation to add additional R-15 insulation over ceilings Recommendation to use acoustical doors in specific areas CONCLUSIONS | RECOMMENDATIONS Reception/ Waiting Area Recommendation of previous interventions Recommendation to upgrade glazing within the waiting area to insulating double laminated glass with a specific type of interlayer material Found we have to reduce the amount of glazing within the waiting area to comply with Ord. 479 PROPOSED WAITING AREA FACADE CHANGES ORIGINAL DESIGN PROPOSED DESIGN ORIGINAL CITY SUBMISSION REVISED CITY SUBMISSION WHAT WOULD THESE REVISIONS LOOK LIKE? PROPOSED DESIGN PROPOSED DESIGN [VIEW FROM THE RECEPTION DESK] ORIGINAL DESIGN REVISED TO MEET REGULATIONS [VIEW FROM THE RECEPTION DESK] PROPOSED PARAPET REVISIONS PROPOSED PARAPET REVISIONS Due to grading considerations adjacent to saved trees, the finish floor elevation raised Some parapets and screen walls designed to shield views of rooftop units are not needed One parapet needs to raise ROOF PLAN ORIGINAL CITY SUBMISSION REVISED CITY SUBMISSION ORIGINAL SUBMITTED RENDERING PROPOSED DESIGN RENDERING Approach video THANK YOU