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A TRUE COPY <br /> 2. The casing pipe must be installed at least 5.5 feet , <br /> below bottom of tie. <br /> 3. Jacking pit location must be at least 30.00 feet from <br /> centerline of near track for pit down to 20 feet below <br /> grade. The pit will be protected with adequate <br /> sheeting, bulkheads, and sidewalls to protect the <br /> Railway's roadbed. Barricades and lights will be set <br /> around the pit for protection. <br /> C. Casing Pipe Specifications are as follows: ` <br /> i <br /> 1. Casing pipe shall have a minimum diameter of 2.0 inches <br /> and size 2.0 through 8.0 inch diameters must be gal- <br /> vanized and standard weight ASTM Specifications A53, <br /> Grade B. Thread coupling is allowed. <br /> 2. Casing pipe 6.0 and 8.0 inch diameters may be used <br /> complying with C-3. <br /> 3. Casing pipe shall be in accordance with current ASTM <br /> Specification A139 and be protected by a black <br /> bituminous coating for PROTECTION AGAINST CORROSION. <br /> Wall thickness shall be as follows: <br /> DIAMETER THICKNESS <br /> finches) (inches) <br /> -- <br /> 6 - 16 1/4 <br /> 18 - 20 5/16 <br /> 22 - 24 3/8 <br /> 26 - 28 7/16 <br /> 30 - 34 1/2 <br /> 36 - 38 9/16 <br /> 40 - 48 5/8 <br /> 52 - 56 11/16 <br /> 60 - 66 3/4 <br /> 72 - 78 13/16 <br /> 84 - 90 7/8 <br /> 96 - 102 15/16 <br /> 108 - 114 1 <br /> 120 1-1/8 <br /> 4. All casing pipe joints will be welded in accordance <br /> with AISC Specifications, Section 1-7-2. All joint <br /> welds will be full penetration. <br /> 5. At no time will construction interfere with the normal <br /> and safe operation of the Railway. No construction, <br /> manpower, or equipment will enter the right of way <br /> beyond safety clearance limits of 20.0 feet from the <br /> centerline of near track. <br /> 2 <br /> �= . ( - .'j r.`:-i+�'SQT�M!`+`,^�,,_1!.�1T y- .,.d; � ;,• 11-,: <br /> `fit• t'4 't'.. t-' 2 \ i• <br />