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j . <br /> Verizon TAC SEA Dagmar—17048.214 September 18,2017 <br /> Structural Analysis Report Page 3 of 4 <br /> (6)Ante!Modem 200 BIAS-T's 135' Cylinder Shroud <br /> All feedlines shall be placed as noted in the table above. <br /> ANALYSIS CRITERIA <br /> A rigorous finite element analysis of this tower was performed to determine its structural compliance <br /> with the current design standard,ANSI/TIA-222-G "Structural Standard for Antenna Supporting <br /> Structures and Antennas." The tower was modeled using the tnxTower Version 7.0.7.0 analysis program <br /> (Tower Numerics Inc.,2016). <br /> The parameters in the following table were used in our analysis of the tower based on its location. <br /> These represent the most stringent requirements of the local jurisdiction,the original design or Annex B <br /> in the ANSI/TIA-222-G Standard. <br /> Snohomish.County,':WA • <br /> Wind Criteria Seismic Criteria <br /> Basic Wind Speed w/o Ice(3-s Gust)': 85 mph Structure Class: II Sas: 0.821 <br /> Basic Wind Speed WI Ice(3-s Gust): 30 mph Exposure: B Sal: 0.476 <br /> Serviceability Wind Speed(3-s Gust): 60 mph Topo Cat(TIA-222-G): 1 R: 1.5 <br /> Kzt(ASCE 7-10): 1.0 <br /> Ice Thickness(Escalating): 1/4" Crest Height: 0' <br /> Notes: <br /> 1. Basic wind speed has been converted to ASD level for input into the computer model,and is equivalent to a <br /> 110 mph,Risk Category II,Ultimate Wind Speed per IBC 2015(Vaso=Vuur' (0.6)). <br /> 2. Refer to the attached topographic profiles used to determine the topographic category. <br /> TOWER ANALYSIS RESULTS <br /> The following table summarizes the findings from our analysis. The table expresses the actual stress <br /> levels in percentage form relative to the code allowable stress values. Stress levels of up to 105%are <br /> considered to be within an acceptable tolerance because of the margin of error associated with this type <br /> of analysis. Stress levels higher than 105%require upgrades to the tower or modifications to the loading <br /> criteria. <br /> Tower:Stress.Levels <br /> Section L1 ., Section L2 Section 13 Section 14 <br /> Load CombinationBase Plate <br /> (131'to 150') (82.6'to 131') (41.3'•.to 82.61 (0 to 41.3')..- <br /> 1.Proposed 10.9% 20.3% 25.0% 41.6% <br /> Configuration 53.1% <br /> { <br /> ®� 250 4th Avenue South,Suite 200 <br /> Edmonds,WA 98020 <br /> ENGINEERING ph.425.778.8500 I f.425.778.5536 <br /> www.cgengineering.com <br />