Laserfiche WebLink
• <br /> s"tl <br /> Nei NorthWest Tower Engineering <br /> WSDOT Monopole, Everett, WA Report No. 180636.08 January 30, 2018 <br /> The tower is supported by a concrete pier. Dimensions of the foundation below grade are <br /> unknown. No foundation information was provided. Therefore NWTE could not verify the <br /> adequacy of the monopole base foundation. Considering that the monopole has significant <br /> reserve capacity it is possible that the foundation is also adequate. <br /> Calculations confirmed the adequacy of the anchor rods and base plate. Welds, plates, and <br /> other elements of the connections were assumed to be adequate. <br /> The tower was found to fall within the Twist and Sway limitations for microwave antennas set <br /> forth in the TIA-222-G standard for 3dB degradation in RF signal. Twist and sway values <br /> calculated at each dish location for 60-mph wind are within allowable limits. Operating <br /> frequencies between 6-11GHz were assumed. <br /> Conclusion <br /> The tower meets the requirements of the TIA-222-G standard and WSDOT's additional <br /> requirement to keep all strength ratios below 90%for the antenna configurations considered. <br /> NWTE recommends, if foundation drawings cannot be obtained, that an investigation be <br /> performed to verify the adequacy of the foundation. <br /> Conditions of Analysis <br /> The analysis performed and the conclusions contained herein are based on the following <br /> assumptions: <br /> • The monopole has been properly installed and maintained. <br /> • Steel grades for structural members are as listed above. <br /> • No x-ray, subsurface excavation, or other similar examination of the tower, foundation <br /> system or welded connections was conducted. For portions of the tower and foundation <br /> system that were not visually accessible, no determination regarding the condition or <br /> adequacy was made. <br /> • All structural components of the monopole including, but not limited to, shaft, connection <br /> components (splices, gusset plates, welds, bolts, anchor rods), and foundations are in <br /> good condition. <br /> • All existing and proposed feed lines are installed on the inside of the monopole. <br /> • No changes to the appurtenance configurations of other tenants have been made since <br /> NWTE's previous structural analysis performed in January 2016. <br /> • Proposed antennas, RRH units, and surge protector will be installed on the existing <br /> platform. <br /> Deviations to these assumptions may affect the analysis results. <br /> NorthWest Tower Engineering www.nwtower.net <br /> 2210 Hewitt Ave,Suite 209,Everett,WA 98201-3767 Tel 425-258-4248 Fax 425-258-4289 <br />