Wyoming Administrative Code
Agency 053 - Workforce Services, Department of
Sub-Agency 0013 - OSHA - Oil & Gas Well Services
Chapter 6 - EQUIPMENT
Section 6-1 - Derricks

(a) Each derrick or mast shall show name of manufacturer, safe load capacity, wind load capacity of miles per hour and capacity rating of derrick or mast.

(b) No derrick or mast shall be subject to a compression load greater than the safe load limit shown on the manufacturer's plate.

(c) Derricks, mast guying and foundations shall comply with the standards for guy lines, anchors and foundation bases for well servicing units.

(d) Derricks and masts shall be equipped with guards which shall prevent the hoisting lines from being displaced from the sheaves during operations or when being raised or lowered from the operating position.

(e) A visual inspection of the service unit shall be made by a qualified person before the derrick or mast is raised or lowered.

(f) A qualified person shall be in charge of raising or lowering a derrick.

(g) Before any derrick is raised or lowered, all tools and material not secured to the derrick shall be removed from the derrick.

(h) The derrick shall be level and plumb before guys are tightened.

(i) Before any load is put on the derrick, all crown guys shall be tightened properly.

(j) No employee shall be allowed in the derrick when it is being raised or lowered.

(k) Each derrick platform shall be constructed, maintained and secured to the derrick to withstand the weight of employees or other stresses which may normally be placed upon it.

(l) Finger boards shall be attached to the derrick to keep them from falling if jarred loose or broken.

(m) Unattached tools or material of any kind shall not be kept in the derrick above the derrick floor unless there is occasion for their immediate use.

(n) There shall be no openings large enough to permit an employee to fall between the beams or main supports or framework of the crown.

(o) No employee shall be in the derrick when the initial pull is made on the rods or tubing or when working or jarring stuck rods or tubing.

(p) All masts shall be equipped with locking devices with sufficient strength to prevent the mast from bending at the hinge point. The locking device shall be approved by the rig manufacturers. The mast will be locked as soon as the mast is in position and remain locked until the mast is to be lowered.

(q) Tubing or rod shall be secured to the appropriate board prior to the employee leaving the board in high winds.