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<br />e <br /> <br />. <br /> <br />. <br /> <br />Mr. Jaime Wambach <br />AMERICAN TOWER CORPORATION <br />11600 96th Avenue North <br />Maple Grove, MN 55369 <br /> <br />Re: Site Number Arden Heiqhts 2 - Arden, MN. <br /> <br />Dear Mr. Wambach: <br /> <br />We have completed the structural analysis for the existing tower, located at the <br />above referenced site. The purpose of this analysis is to determine that the existing <br />tower design is in conformance with the EIAlTIA-222-F standard for the proposed <br />antennae loads installation. Refer to the Review and Recommendations section at <br />the end of this report for the analysis results. <br /> <br />Description of Structure: <br /> <br />The structure is a 700 ft Rohn 80 guyed tower that has been shortened to 620 ft. <br /> <br />Refer to the supplied Rohn drawing and the supplied mapping for a detailed <br />description of the structure. <br /> <br />Method of analysis: <br /> <br />The tower was analyzed using Semaan Engineering Solutions' software suite for <br />communication structures. The structural analysis is performed using the SAPS <br />finile element engine. The method is 3D, non-linear, which accounts for the <br />second order geometric effects due to the displacements. It also treats guys as <br />exact cable elements and therefore is ideal for guyed towers. The analysis was <br />performed in conformance with EIAfTIA-222-F for 80 mph with 1/2" radial ice. <br />Wind is applied to the structure, accessories and antennas. <br /> <br />. Page 2 <br />