Eye
(17) Eye means a loop formed at the end of a rope by securing the dead end to the live end at the base of the loop. (18) A fiddle block is a block consisting of two sheaves in the same plane held in place by the same cheek plates. (19) The foot bearing or foot block (sill block) is the lower support on which the mast rotates. (20) A gudgeon pin is a pin connecting the mast cap to the mast allowing rotation of the mast. (21) A guy is a rope used to steady or secure the mast or other member in the desired position. (22) Load, working means the external load, in pounds, applied to the derrick, including the weight of load attaching equipment such as load blocks, shackles, and slings. (23) Load block, lower means the assembly of sheaves, pins, and frame suspended by the hoisting rope. (24) Load block, upper means the assembly of sheaves, pins, and frame suspended from the boom. (25) Mast means the upright member of the derrick. (26) Mast cap (spider) means the fitting at the top of the mast to which the guys are connected. (27) Reeving means a rope system in which the rope travels around drums and sheaves. (28) Rope refers to wire rope unless otherwise specified. (29) Safety Hook means a hook with a latch to prevent slings or load from accidentally slipping off the hook. (30) Side loading is a load applied at an angle to the vertical plane of the boom. (31) The sill is a member connecting the foot block and stiffleg or a member connecting the lower ends of a double member mast. (32) A standby derrick is a derrick not in regular service which is used occasionally or intermittently as required. (33) Stiffleg means a rigid member supporting the mast at the head. (34) Swing means rotation of the mast and/or boom for movements of loads in a horizontal direction about the axis of rotation.