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<br />~ CCftW~ <br /> <br />',,~BHHIC..Al <br /> <br />www.iets.com <br /> <br /> <br />r <br /> <br /> <br />Engineering Services <br /> <br /> <br />May 6, 2005 <br /> <br />Mr. John Eigenbrode <br />Crown Castle International <br />9105 Monroe Road <br />Suite 150 <br />Charlotte, NC 28270 <br />(704) 321-3816 <br /> <br />Subject: <br /> <br />Structural Modification Letter <br /> <br />lETS, P.C. <br />129 Greenwich Road <br />Charlotte, NC 28211 <br />(704) 522-1131 Phone <br />(704) 522-1280 Fax <br />tow~r~ta@iets.com <br />00 ~/ "-0 <br />~<?~~~.n <br />o "1~ 00 ~~ <br />Crown Castle BU Number: 816298 ~o. q;_ c:..');::< <br />Crown Castle Site Name: "Zephyrhills" ~<):. \. '-~.'" ^>00~ <br />~.... <"e- ~,%?J.. <br />~di0. '1Q~ <br />~ 00 (4;-:~ <br />702 Avenue B, Zephyr Hills, FL, Pasco County ~'_'-'<:(0~, 0( <br />Latitude 280-13'-40.63", Longitude -820-10'-45.6", "'tj~>._ <') <br />288 Foot - Self Support Tower <br /> <br />lETS Project Number: 2005-70458 <br /> <br />Crown Castle Designation <br /> <br />Engineering Firm Designation <br /> <br />Site Data <br /> <br />Dear Mr. Eigenbrode, <br /> <br />lETS is pleased to submit this "Structural Modification" for the aforementioned tower. This <br />modification has been performed in accordance with Crown Castle Purchase Order Number 180384. <br /> <br />The modifications were designed in accordance with the 2001 Florida Building Code, 2003 Amendments, <br />based upon a 3-second gust wind speed of 110 mph in accordance with ASCE 7 and a fastest mile wind <br />speed of 105 mph in accordance with the TIAlEIA-222 standard. The modifications were designed to <br />accommodate the following loads. <br /> <br />Table 1 - Existing, Proposed, and Reserved Antenna and Cable Information <br /> <br />Center Line Number of Antenna Number of Feed <br />Elevation Antenna Manufacturer Antenna Model Mount Feed Lines Line Size <br />(feet) (inches) <br />295 1 Decibel DB224 Leg Mount 1 1-5/8 <br />225 6 EMS RR33-20-02DPL4 T-Frame 12 1-5/8 <br />203 6 Scala AP 18-190010900 T-Frame 6 1-5/8 <br />177 6 Antel LPD7905/8 T-Frame 2 1-5/8 <br />4 7/8 <br />177 3 Antel LPD7905/8 Face Mount 1 1-5/8 <br />2 7/8 <br />120 12 Decibel DB878G90A-XY T-Frame 12 1-5/8 <br /> <br />Table 2 below shows the percent capacities after installation of the modifications. <br /> <br /> <br />Nationa' Society of <br />Profea'ona' Eng'neerse <br />SI,IIItllf', IlIPE L1c,_d "'mll" <br />