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SAFETT•PRECAUTIONS F.OR-ATS-SYSTEMS <br />• 1. Automated Temporary Support <br />a. When roof drills with ATS 'are used, temporary <br />supports (jacks or timber posts) will not be used <br />except when mechanical failure of the ATS prevents <br />its deployment. The provisions of (b) then apply. <br />b. When it is determined that roof drills without ATS <br />are to be used, temporary roof support (jacks or <br />timber posts) will be installed (on no more than <br />five-foot centers) immediately. <br />2. a. Except on electrical roof bolters, the ATS system <br />will be placed firmly against the roof before bolter <br />operator proceeds inby permanent support. <br />b. A check valve or equivalent protection will be <br />incorporated in the ATS system to eliminate the <br />danger of collapse through sudden loss of hydraulic <br />fluid from a broken hose. <br />c. Except on electrical roof bolters, the roof bolter <br />operators will not drill holes or install bolts: <br />1) beyond the inby beam of the ATS system unless the <br />distance between the coal face and this beam is <br />equal to or less than five (5) feet; and <br />• 2) to the left or right of the outer roof contact <br />points unless the coal rib or a temporary support <br />is within five (5) feet of these contacts. <br />3. No place shall be left standing over a weekend or any <br />other extended period (48 hours) without at least one (T) <br />row of temporary supports installed on not more than 5- <br />foot centers placed across the opening and a "DANGER' sign <br />provided to warn persons of an unsupported area. <br />4. This temporary roof support is capable of supporting a <br />minimum of 53,000 pounds vertical load. <br />Page Nine <br />• Revised 06/04/80 <br />Revised 08/17/82 <br />