319 76TH ST SW 2024-06-13 - Laserfiche WebLink

} aka; NWTE NorthWest Tower Engineering g g 76th Street, Everett, WA Report No. 210622.08 February 1, 2021. The tower was found to fall within the Twist and Sway limitations for microwave antennas set forth in the TIA-222-G Standard for 3dB degradation in RF signal. Twist and sway values calculated at each dish location for 60-mph wind were found to be within allowable limits. Operating frequencies of 6 and 11GHz were assumed. Conclusion The tower meets the requirements of the TIA-222-G and TIA-222-H standards for the antenna configurations considered. No structural upgrades are required. Conditions of Analysis The analysis performed and the conclusions contained herein are based on the following assumptions: • The tower has been properly installed and maintained. • Steel grades for structural members are as listed above. • No x-ray, subsurface excavation, or other similar examination of the tower, foundation system, or welded connections was conducted. For portions of the tower and foundation system that were not visually accessible, no determination regarding the condition or adequacy was made. • All structural components of the tower including, but not limited to, structural members (legs, bracing, etc.), connection components (gusset plates, welds, bolts), and foundations are in good condition. • Proposed feed lines will be installed on the tower as shown in the attached cross section. Note, NWTE does not recommend using snap-in style coax line hangers. • Proposed MW antennas will be installed with standard pipe mounts and stabilizers as recommended by the manufacturer. • Other proposed antennas will be installed on mounting frames per the manufacturer recommendations, per the above proposed appurtenance schedule. Deviations to these assumptions may affect the analysis results. NorthWest Tower Engineering 5 www.nwtower.net 3426 Broadway,Suite 302,Everett,WA 98201 Tel 425-258-4248 Fax 425-258-4289