ASME B30.6-2020 pdf – Derricks.
:20 6-3.2.5 ResponsibiLities of SignaLpersons
A signalperson assigned to a load handling activity shall at a minimum be responsible for the following:
(a) identifying himself/herself as the signalperson to the load handling equipment operator(s) before commencing a load handling activity
(b) confirming with the operator the method of communication and the associated signals that are to be used during the load handling activity
(c) ensuring that standard, discernible signals provided to the operator are in accordance with Section 6-3.4
(d) verifying that load handling activities are stopped if there is a need to give instructions to the operator, other than those provided by the established signal system
(e) ensuring that telephones, radios, or other equipment intended for use as the primary signal system are tested prior to the load handling activity
(fl ensuring that a form of communication is maintained with the operator during all load handling activities
(g) ensuring that all directions given to the operator shall be given from an understood and agreed perspective (e.g., swing clockwise)
(h) ensuring that each series of voice signals contains three elements stated in the following order:
(1) function and direction
(2) distance and/or speed
(3) function stop
(I) ensuring that special signals (when needed) that are not covered by para. 6-3.4.2 do not conflict with standard signals
(f) avoiding giving signal commands that would result in loads being lifted over personnel whenever possible
6-3.3.1 Size of Load
(a) No derrick shall be loaded beyond the rated load for the particular derrick configuration, except for test purposes as provided in para. 6-2.2.2.
(b) When loads approach the maximum rating of the derrick, the lift director shall ascertain that the weight of the load has been determined within ±10% before it is lifted.
(c) When rotation-resistant ropes are used with an operating design factor less than 5, but in no case less than 3.5, the special provisions that follow shall apply:
(1) For each such lifting assignment
(-a) a qualified person shall ascertain that the rope is in satisfactory condition [see paras. 6-2.4.1 (a)(1) (-a) through 6-2.4.1 (a)(1)(-d)] both before and after each lift, but if more than one broken wire in any one lay is found, the lift shall not be made
(-b) operations shall be conducted in such a manner and at such speeds as to reduce dynamic effects
6-3.3.2 Attaching the Load
(a) The hoist rope shall not be wrapped around the load.
(b) The load shall be attached to the hook by means of slings or other devices of sufficient capacities.
6-3.3.3 Moving the Load
(a) The person directing the lift shall see that the load is well secured and properly balanced in the sling or lifting device when it is initially lifted.
(b) Before starting the lift, note the following conditions:
(1) Hoist rope shall not be kinked.
(2) Multiple part lines shall not be twisted around each other.
(3) The hook shall be brought over the load in such a manner as to prevent swinging.
(4) If there is a slack rope condition, it should be determined that the rope is properly seated on the drum and in the sheaves.
(c) During lifting, care shall be taken that
(1) there is no sudden acceleration or deceleration of the moving load
(2) the load does not contact any obstructions
(d) A derrick shall not be used for side loading except when specifically authorized by a qualified person who has determined that the various structural components will not be overstressed.
(e) The operator should avoid carrying loads over people.
(1) The operator shall test the brakes each time a load approaching the rated load is handled by lifting it a few inches and applying the brakes.
(g) Neither the load nor boom shall be lowered below the point where less than two full wraps of rope remain on their respective drums.
(h) When rotating a derrick, sudden starts and stops shall be avoided. Rotational speed shall be such that the load does not swing out beyond the radius at which it can be controlled. A tag or restraint line should also be used.
(I) Boom and hoisting rope systems shall not be twisted.
ü) The operator shall not hoist, lower, or swing while anyone is on the load or hook.
6-3.3.4 PersonneL Lifting
This Volume recognizes that derricks are designed and intended for handling materials and not personnel. Personnel are only permitted to be lifted in a personnel platform under the following conditions.