Special provisions for derricks

As circumstances require, the employer, the operator or both shall ensure the following: (1) Bracing of foot blocks. The foot blocks of every derrick shall be securely supported and firmly anchored against movement in any direction. (2) Guys. (A) Number and spacing. The top of any guy derrick mast more than 25 feet in height shall be steadied by not less than six wire rope guys so spaced as to make angles between adjacent guys approximately equal. (B) Attachment. Wire rope guys shall be secured by weldless steel sockets, thimble and splice connections, thimbles with proper size and numbers of rope clips or cast steel guy plates having grooved bearing surfaces of the same shape and size as the wire rope thimbles, using a spliced or wire rope clip attachment. (C) Anchoring. Guys shall be attached to strong, permanent construction or to substantial "deadmen" or counterweights securely anchored in the ground. (3) Breast-type derricks. Breast-type derricks shall be guyed from both the front and rear. Where front guys are not possible because of derrick operation, provisions shall be made to prevent such derricks from tipping backward. Breast-type derricks that are operated by hand power shall have the hand grips securely and positively fastened to the shaft and a ratchet and pawl shall be provided that will hold any load. (4) Derrick construction. (A) Materials. The mast, boom, frame and similar parts of a derrick shall be constructed of suitable steel or of selected wood of proper strength and durability. (B) Mast fittings. On derricks that have booms longer than the masts, the gudgeon pins, mast tops and goosenecks shall be securely fastened to the tops of the masts to prevent such parts from pulling out when the booms are raised. (5) Derrick capacity charts. (A) A capacity chart shall be provided for every derrick and such chart shall be posted conspicuously on the job site. Unless furnished by the manufacturer or builder of the derrick, the capacity chart shall be prepared and certified by a professional engineer licensed in the state of Connecticut and a copy thereof shall be submitted to the Commissioner of Public Safety upon request. (B) A derrick shall not lift any load that exceeds the relevant maximum specified on its capacity chart.