R 408.15721 Construction of derricks and masts.

Rule 5721. (1) A derrick or mast manufactured after November 21, 1979, shall have a permanent nameplate which is attached to the structure and which indicates all of the following information: (a) Name of manufacturer. (b) Model number and serial number. (c) Rating, including maximum static hook load capacity with the number of lines. (d) Whether guying is applicable and the recommended guying pattern. If guying requirements do not appear on the nameplates, the derrick or mast shall be guyed as prescribed by API SPEC 4E-1974, entitled “Specification for Drilling and Well Servicing Structures,” which is herein adopted by reference and may be inspected at the Department of Licensing and Regulatory Affairs, MIOSHA Standards Section, 7150 Harris Drive, P.O. Box 30643, Lansing, Michigan, 48909-8143. The specifications may be purchased at a cost of $125.00 from IHS Global, 15 Inverness Way East, Englewood, Colorado, 80112, USA, telephone number: 1-800-854-7179 or via the internet at website: http://global.ihs.com. (2) An employee qualified in procedures for raising and lowering the mast shall be in charge of raising and lowering operations and shall do both of the following: (a) Visually inspect the raising or lowering mechanism. (b) Assure that all tools and materials which are not secured are removed from the mast. (3) Only an employee required to carry out the operation shall be allowed in or under the mast unless it is in the fully raised or lowered position. (4) The mast shall be level and properly positioned before raising, lowering, scoping the structure, or tightening guylines. (5) Before imposing any load on a derrick or mast, all required load guys shall be properly tightened. (6) Mast crown sheaves shall be guarded to prevent the hoisting line from being displaced from the grooves during all operations. (7) A derrick board or other platform shall be constructed, maintained, and adequately secured to the structure to withstand the weight of employees and other stresses placed upon the platform. (8) An unguarded opening large enough to permit a person to fall through shall not exist between the beams or main supports of the crown block. (9) If bumperblocks are used under the crown block beam, a safety cable or strap shall be fastened along their full length with both ends secured to the derrick. (10) All counterweights above the rig floor, when not fully encased or running in permanent guides, shall have a safety chain or wire rope safety line anchored to the derrick or mast to secure them. The chain and wire rope shall be capable of sustaining the drop load and shall limit the drop counterweight to not less than 7 feet from the floor. (11) Load-bearing hydraulic jacks shall have a safety lock device, double valves, or the equivalent.. (12) A derrick, mast, and auxiliary parts shall be maintained in a safe condition.