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85 '57 Oi:13PM MILLERBEPJgD MII m FRBEPJgD "P.1 <br /> ~ 85 '97 8~:ldPM <br /> <br />Scott Bsllance <br />Bechtel <br />US West Wirel~ Project <br />42~ North Fairvi~, Room 101 <br />St. Paul, MN ~104 <br /> <br />1~: lVlfll=b~ Mfg. Co. Ant~,,~ ldonopole 5u~ctuul htc~7 <br /> <br />Thc Millerbemd lVif~. Co. monopoles used by US West for this proj¢ot meets or exceeds the <br />requkcnmnts of EIA/TIA-222 "Structural Standards for Steel Ant~ Towers and An~e <br />Supponin~ Suucturcs" specificafio~ This is ~e r~co~;~-ed specification Ibr these types of <br />towers. When de~?~n§ the structure., wind & ice loading along wiIb. ~o n~mher, s~ze, he~gh~ <br />and style of~um~g of the antenms sre tak~ ~to account to detem~ne ~¢ size of~e <br />struc'tu~ requi~ed. The ~e wiil have an approximate ssL~y f~ctor o~ 1.~, or in o~r <br />words, w~lbe 1.~ ~s stron§er tha~ it ne~s to be. Tho monopole h~s been desired <br />withstand at least 100 MPH with a 1/2" thick coating of ice ~n the monopole <br /> <br />Millcrbcrnd Mfg. Co. only uses Ame~an-Made carbon st~cl (ASTM A~72 or A607) which has <br />a ~0,000 PSI ngn yield. All our steelis orcle~cl with rrn'll certificafim~ to vexify integrily oi'the <br />mater~t The mill cerfif~athms are kept on file, should a copy b= requ~ed at some future date. <br />Only AWS-D1.1 "Stmctund Welding Code" qualified personnel will be used dm-lng thc weJzli~_ <br />of the stm~re. Wold inspections will be performed by SI~F-TC-1A quatified Non-Destructive <br />Test Personnel to verify the soundness of the welds. <br /> <br />With the pole designed and manufactured in accordance with the above criteris, MiIlerbcrnd <br />Ivif~. Co. certi~s that the monopole writ not collapse. If far some reason, the wind loading <br />exceeds the monopole catty capabilities, t~e pole w~l not collapse, but rather the top of the pole <br />will start to bend over and the pole will begin to look like an upside down $. The bonding will <br />contimie tmiI tt~ antennas at the top eric pole reach a position such tt~ thc wind is blowing <br />ovc~ the antennas and not into the~ Once th;~ position is reached, the monopole will stop <br />bending and maintain that position. For tho bending to happen, the wind would have to reach <br />over 1751VIPH and be rn,intained for a length of time. <br /> <br />MILLERBERND MANUFACTURING COMPANY * P.O. BOX 98 · I/VINSTED, MINNESOTA 65395 <br /> PHONE (320) 485..2f'/f · FAX (320) 485.4420 <br /> <br /> <br />