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60 ft Monopole Tower Structural Analysis June 20, 2019 <br /> Project Number 2019777.824022.02, Order 489098, Revision 0 CCI BU No 824022 <br /> • Page 6 <br /> 5) DISCLAIMER OF WARRANTIES <br /> GPD has not performed a site visit to the tower to verify the member sizes or antenna/coax loading. If the <br /> existing conditions are not as represented on the tower elevation contained in this report, we should be <br /> contacted immediately to evaluate the significance of the discrepancy. This is not a condition assessment of the <br /> tower or foundation. This report does not replace a full tower inspection. The tower and foundations are <br /> assumed to have been properly fabricated, erected, maintained, in good condition, twist free, and plumb. <br /> The engineering services rendered by GPD in connection with this Structural Analysis are limited to a computer <br /> analysis of the tower structure and theoretical capacity of its main structural members. No allowance was made <br /> for any damaged, bent, missing, loose, or rusted members (above and below ground). No allowance was made <br /> for loose bolts or cracked welds. <br /> This analysis is limited to the designated maximum wind and seismic conditions per the governing tower <br /> standards and code. Wind forces resulting in tower vibrations near the structure's resonant frequencies were <br /> not considered in this analysis and are outside the scope of this analysis. Lateral loading from any dynamic <br /> response was not evaluated under a time-domain based fatigue analysis. <br /> GPD does not analyze the fabrication of the structure (including welding). It is not possible to have all the very <br /> detailed information needed to perform a thorough analysis of every structural sub-component and connection <br /> of an existing tower. GPD provides a limited scope of service in that we cannot verify the adequacy of every <br /> weld, plate connection detail, etc. The purpose of this report is to assess the capability of adding appurtenances <br /> usually accompanied by transmission lines to the structure. <br /> It is the owner's responsibility to determine the amount of ice accumulation in excess of the code specified <br /> amount, if any, that should be considered in the structural analysis. <br /> The attached sketches are a schematic representation of the analyzed tower. If any material is fabricated from <br /> these sketches, the contractor shall be responsible for field verifying the existing conditions, proper fit, and <br /> clearance in the field. Any mentions of structural modifications are reasonable estimates and should not be <br /> used as a precise construction document. Precise modification drawings are obtainable from GPD, but are <br /> beyond the scope of this report. <br /> Miscellaneous items such as antenna mounts, etc., have not been designed or detailed as a part of our work. <br /> We recommend that material of adequate size and strength be purchased from a reputable tower manufacturer. <br /> Towers are designed to carry gravity, wind, and ice loads. All members, legs, diagonals, struts, and redundant <br /> members provide structural stability to the tower with little redundancy. Absence or removal of a member can <br /> trigger catastrophic failure unless a substitute is provided before any removal. Legs carry axial loads and derive <br /> their strength from shorter unbraced lengths by the presence of redundant members and their connection to the <br /> diagonals with bolts or welds. If the bolts or welds are removed without providing any substitute to the frame, <br /> the leg is subjected to a higher unbraced length that immediately reduces its load carrying capacity. If a <br /> diagonal is also removed in addition to the connection, the. unbraced length of the leg is greatly increased, <br /> jeopardizing its load carrying capacity. Failure of one leg can result in a tower collapse because there is no <br /> redundancy. Redundant members and diagonals are critical to the stability of the tower. <br /> GPD makes no warranties, expressed and/or implied, in connection with this report and disclaims any liability <br /> arising from material, fabrication, and erection of this tower. GPD will not be responsible whatsoever for, or on <br /> account of, consequential or incidental damages sustained by any person, firm, or organization as a result of <br /> any data or conclusions contained in this report. The maximum liability of GPD pursuant to this report will be <br /> limited to the total fee received for preparation of this report. <br /> tnxTower Report-version 8.0.5.0 <br />