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BOEING EVERETT SECTION 34 11 70 <br /> NEW RAIL SPUR TRACKWORK-GENERAL RE�UIREMENTS <br /> WORK ORDER 10-305 <br /> B Place the CWR on ba;lasted track and embedded fastener rail seat in accordance with the approved <br /> workinp drawings submitted m accordance wdh Sec6on 34 11 16, Wa�dmg of Rail <br /> C Rail Temperature <br /> 1 A record ot the rail IemperaWre and the information specified hereinafter shall be recoided by <br /> the Contrector at the lime of rail anchoring and turnished to Bceing ConsWcdon Manager. <br /> a. Location by stalion,lreck designation,and rail. <br /> b. Date and lime. <br /> c. Reil weight and section,mill brand,year and rr�.mth rolled,and heat number otthe end <br /> rails in each CWR string. <br /> d. Lenglh of CWR string in feet. <br /> e. Air temperaWre, rail temperature,and epproximate weather conditions. <br /> f. Reil end gap lo nearest 1118 inch. <br /> g Adjuslments applied to obtain zero thertnal stress. <br /> 2. Delermine rail temperature by means of AREMA standard rail thermometers as specified in <br /> Chapler 5, Par16, of the AREMA Manual. <br /> a. Plece two rail ihermometers on lhe shaded side of the rail bese nexl to the web and <br /> leave in place until no changes in lhe readings are detected, but no less lhen ten <br /> minutes. <br /> b. Take the average ot the two temperature readings al the time o1 edjusting the gap <br /> between rail ends. <br /> 3. If the rail temperature deviates from the specified zero thertnal stress ranpe, laslening or <br /> anchoring of rail shall cease until lhe rail temperalure returns to within lhe specified range <br /> and the rail hes been vibre;ed to relax localized stress build-up. <br /> D. Gap Dunng rail laying,determine lhe gap between CWR slrings and belween CWR and boRed rail <br /> by using the equa6on <br /> G = (t-T)LK+O <br /> Where. <br /> G = Rail gap m mches. <br /> t = zero thermal stress temperature in degrees F: <br /> T= Average actual rad temperalure at time of laying in degrees F , <br /> l= One-half the sum oi lengths of CWR string being I.:id and the preceding CWR siring, <br /> K = CoeHicien' if lhermal expansion for rail steel(OA00078 inch per tool per degree F.); and; <br /> � = Rail gap as�equired by manufadurers oi field weld kit in inches For bonded insulated <br /> joints 4 equals the end post thickness. <br /> [ Dutchman. Insert a dutchman at the lime lhe rai�is being laid to prevent damage to the rail ends <br /> during rail laying,ballasting,and olher operalions requiring passage otorntrack equipment over Ihe <br /> rail jomts. <br /> 1. The dutchman, equal m length lo G minus 1l2 inch where G is determmed by Ihe formula in <br /> the precedmg paragreph, shall be inserted afler the rail has been laid, except thal no <br /> dutchman shall be inserted il the computed rail gap G is less than 1-1/2 inches <br /> Peimit Sel 34 i t 10- 8 <br /> September 23. 2011 <br />