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B+T GRP <br /> Date: July 20, 2021 D <br /> SEp B+T Group <br /> 2 9 1021 1717 S. Boulder, Suite 300 <br /> Tulsa, OK 74119 <br /> DEC 14 2022 J C p�of rtir, (918) 587-4630 <br /> nnit$eFyices TT towersupport@btgrp.com <br /> CITY OF EVERETT <br /> Subject: Permit Services Mount Modification Report <br /> Carrier Designation: AT&T Mobility Equipment Change-Out <br /> Carrier Site Number: SN89 <br /> Carrier Site Name: Mukilteo Heights <br /> Carrier FA Number: 10102253 <br /> Crown Castle Designation: BU Number: 826263 <br /> Site Name: Norpro <br /> JDE Job Number: 664012 <br /> Order Number: 565138, Rev.0 <br /> Engineering Firm Designation: B+T Group Report Designation: 92189.006.01 <br /> Site Data: 2215 Merrill Creek Pkwy, Everett,WA, Snohomish, 98203. <br /> Latitude 47°56'32.81" Longitude-122° 15'42.95" <br /> Structure Information: Tower Height&Type: 150 ft. Monopole <br /> Mount Elevation: 136 ft. <br /> Mount Type: 14.5 ft. Platform Mount <br /> B+T Group is pleased to submit this "Mount Modification Report" to determine the structural integrity of AT&T <br /> Mobility's antenna mounting system with the proposed appurtenance and equipment addition on the <br /> abovementioned supporting tower structure. Analysis of the existing supporting tower structure is to be <br /> completed by others and therefore is not part of this analysis. Analysis of the antenna mounting system as a tie- <br /> off point for fall protection or rigging is not part of this document. <br /> The purpose of the analysis is to determine acceptability of the mount's stress level. Based on our analysis we <br /> have determined the stress level to be: <br /> Platform Mount Sufficient <br /> *See Section 4.1 of this report for the structural modifications required in order for the mount to support <br /> the loading listed in Table 1. <br /> This analysis has been performed in accordance with the 2018 Washington State Building Code based upon an <br /> ultimate 3-second gust wind speed of 98 mph.Applicable Standard references and design criteria are listed in <br /> Section 2-"Analysis Criteria". <br /> Mount structural analysis prepared by: Joseph Variamparampil <br /> Respectfully submitted by: B&T Engineering, Inc. <br /> COA: 3425 Expires: 12/31/2021 t.0 s w'" <br /> ,, 441411111 <br /> John W. Kelly III, P.E., S.E. G� 50 1�� j ) , <br /> a� <br /> pQ <br /> 'U <br />