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. to the derrick, must beless than 6 tt.(2 m)tong. I ne saC�,r, belt controlling the rotary drive Into neutraland place the feed lever and lifeline must be strong enough to withstand the dynamic in neutral. Before leaving the vicinity of the drill, shut down the force of a 250 Ib. (115 kg)weight(contained within the belt)fall- drill engine. • Throwing or dropping tools must not be permitted.Carefully ing 6 (2 m). pass tools by hand between personnel or use a hoist line. Use a safety device when climbing to a derrick platform that i • Do not consume alcoholic beverages,other depressants,or :higher than 20 ft. (6 m). When an a derrick platform,fasten the lifeline to the derrick chemical stimulants prior to starting work on a drill rigor while just above the derrick platform and to a structural member that on the job. is not attached to the platform onto other lines or cables support- * If it is necessary to drill within an enclosed area, make cer- ing the platform. tain that exhaust fumes are conducted out of the area. Exhaust . When first arriving at a derrick platform,immediately inspect fumes are toxic and some cannot be detected by smell. for broken members, loose connections, loose tools, or other • Clean mud and grease from boots before stepping on a drill loose materials. platform and use hand holds and railings. Watch for slippery . Securely attach tools to the platform with safety lines. Do not ground when stepping down from the platform. attach a tool to a line attached to one's wrist or any other part of • During freezing weather,do not touch any metal parts of the the body. drill rig with exposed flesh. Freezing of moist skin to metal can • When working on a derrick platform,do not guide drill rods occur almost instantaneously. or pipe into racks or other supports by taking hold of a moving • Drain all air and water lines and pumps when not in use if hoist line or a traveling block. freezing weather is expected. • Do not leave loose tools and similar items on the derrick plat- e Adequately cover or protect all unattended boreholes to pre- form or on structural members of the derrick. vent drill rig personnel,site visitors,or animals from stepping or q derrick platform over #t.(1.2 ma above ground surface must failing into the hole.Cover, protect or backfill all open boreholes have toe boards and safety railing that are In good condition. according to local or state regulations on completion of the drill- . Avoid being under rig workers on elevated platforms ing project. whenever possible. • Never allow"horsing around" within the vicinity of the drill rig and tool and supply storage areas — even when the drill rig If heavy objects must be manually lifted, exercise care to Is shut down. • When using a ladder on a drill rig,face the ladder and grasp avoid injury. • Before lifting an object without using a hoist,make sure that either the side rails or the rungs with both hands while ascend- the load is within your personal lifting capacity. if it is too heavy, ing or descending. Do not attempt to use one or both hands to ask for assistance. carry a tool while on a ladder.Use a hoist line and a tool "bucket" • Before lifting a relatively heavy object,approach the object or a safety hook to raise or lower hand tools. by bending at the knees,keeping the back vertical and unarched • Terminate drilling operations during an electrical storm and move the complete crew away from the drill rig. while obtaining a firm footing.Grasp the object firmly with both hands and stand slowly and squarely while keeping the back ver- tical and unarched. In other words, perform the lifting with the An elevated derrick platform should be used with the follow muscles in the legs, not with the muscles in the lower back. ing precautions: • When working on a derrick platform, use a safety belt and • If a heavy object must be moved some distance without the a lifeline. The safety belt must be at least 4 in. (100 mm) wide aid of machinery,keep the back straight and unarched.Change and should fit snugly but comfortably.The lifeline,when attached directions by moving the feet, not by twisting the body. 413- -17-