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<br />.' -. <br />" <br /> <br />. <br />. <br /> <br />. <br /> <br />. <br /> <br />-2-) ~ <br />.4 <br /> <br />(" 'J(~. 1. <br /> <br />diJ <br />t,lEhresmann <br />Ell Engineering Inc. <br />and Associates <br /> <br />4400 Wesl31 st SI. - Yankton, so 57078 <br /> <br />Phone: (605) 665-7532 Fax: (605) 665-9780 <br /> <br />E-Mail: eei@byelectric.com <br />Web Address: hllp:llsdibi.northern.eduJehresmann <br /> <br />November 23, 1999 <br /> <br />Mr. Dan Vaughan <br />Arden Towers, Inc. <br />3440 Bayside Road <br />Orono, MN 55356 <br />Ph: 612-473-3660 <br />Fax: 612-473-3880 <br /> <br />subject: 700' Rohn 80 Guyed Tower <br />Site: Arden Hills, MN <br />EE! JOi 27366-99 (Revision B) <br /> <br />Dear Mr. Vaughan, <br /> <br />We have completed our revised structural stress analysis of <br />the above described tower per your request. All information <br />required to complete our structural analysis was furnished <br />to EE! by your office. <br /> <br /> <br />~~h8!l"r!-~!!~~!fU~~::9~j!.~!t~f~~ '.'~~~e4~~~;~~b'!.{nfi~~ <br /> <br />l~,~.~.' . t~j:~~pX9~e~~~~fl!.~swere calculate,Q in accord- <br />an9,~,,;;,.~1 ~!:I"~",,Jl,;1!:..frQ~,;,,:r()~f&l.~ f ~p,.~,. d~ ted 1 0/12/9 81ndlci1t,~Ag <br />,~~~t~~.:P"'~~~f9J:;!i,~~S are btindledand eveIily distributed ont'he <br />(.../ 'tower ' aces. <br /> <br />HOW~Yer, ,":pel;l>.h.()~oS dated 10/19/99 furnished to our office <br />tlie!eedHiI'eg.oa:pp'earto not be bUndled as you had indicated. <br />For the subj ect tower to, Iilgr~e ,with our analysis <br />considerations and results, tile, Ieed)..ines must be installed <br />as shown on our attached drawing 27366A1-1. <br /> <br />As stated in previous reports, at the time this tower was <br />erected it was rated for installation up to BOO ft depending <br />on member sizes and tower loading. 'l'~'_Ubje9t..~N.IS) <br />( t~ep~(ore.....a.~'IlJ:;~..a,chi,ng, t., h. e Ii.mi. t. i.. ng.. he" 1....9. tit 'and '66'irS'''''IiIW'"ibr'e <br />. ltoJ~-:!1i8;ti~!Ila!.~!~Origil1a_llY_d~Signed for. <br /> <br />Therefore, it is our opinion that even though the stress <br />ratios indicate additional loading can be installed on the <br />subject tower, we suggest all criteria outlined in this <br /> <br />Antenna Support Structuru - Guyed and Self-Bfpyorti"if 7bwe,.. and Monopala - Stell FobriaIticm <br />Structural AnGly.itJ .]nopecticn . Specifi=ticno . Pro.;.ct Manog~ment . lktaili"if - P.E. c-tifi=tion <br />