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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 feat 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 />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 S. 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 />DMUTER <br />THICKNESS <br />(inches) <br />(inches)- <br />--6 - 16 <br />1/4 <br />18 - 20 <br />5/16 <br />22 - 24 <br />3/8 <br />26 - 28 <br />7/16 <br />30 - 34 <br />1/2 <br />36 - 38 <br />9/16 <br />40 - 48 <br />5/8 <br />52 - 56 <br />•11/16 <br />60 - 66 <br />3/4 <br />72 - 78 <br />13/16 <br />84 - 90 <br />7/8 <br />96 - 102 <br />15/16 <br />108 - 114 <br />1 <br />120 <br />1-1/8 <br />4. All casing pipe joints will be welded in accordance <br />With RISC Specifications, section 1-7-2. All joint <br />welds will be full penetration. <br />S. 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 />P87 <br />