16.H Critical Lifts.
16.H.01 When using LHE, the following are identified as critical lifts requiring detailed planning and additional or unusual safety precautions. Critical lifts are defined as:
- Lifts involving hazardous materials (e.g., explosives, highly volatile substances);
- Hoisting personnel with LHE;
- Lifts made with more than one LHE;
- Lifts where the center of gravity could change;
- Lifts made when the load weight is 75% of the rated capacity of the LHE load chart or more (not applicable to gantry, overhead or bridge cranes);
- Lifts without the use of outriggers using rubber tire load charts;
- Lifts using more than one hoist on the same LHE;
- Lifts involving Multiple Lift Rigging (MLR) Assemblies or other non-routine or technically difficult rigging arrangements;
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Lifts involving submerged loads.
Exception: lifts that were engineered to travel in guided slots throughout the lift and have fixed rigging and/or lifting beams, i.e., intake gates, tailgates/logs);
- Lifts out of the operator's view.
Exception: if hand signals used by a signal person in view of the operator or radio communications are available and in use, load does not exceed two tons AND is determined a routine lift by the lift supervisor;
- Load Tests;
- When land-based LHE mounted on barges, pontoons or other means of flotation are required to travel while lifting the load. > See Sections 16.L.03 and 16.L.04.
- Any lift the operator believes should be considered critical.
16.H.02 Critical lift plans.
Before making a critical lift, a critical lift plan must be developed. > See Non-Mandatory, Critical Lift Plan, Form 16-3.
Form 16-3 (Page 1)
Form 16-3 (Page 2)
- By a CP and must include the LHE operator, lift supervisor, and the rigger and signed by all involved personnel prior to the lift;
- For a series of lifts on one project or job, as long as the LHE, personnel, type loads and configuration do not differ;
- Documented with a copy provided to the GDA for acceptance prior to the lift(s) being made;
- And must include, as a minimum:
- (1) The specific make and model of each piece of LHE, the line, boom, and swing speeds;
- (2) The exact size and weight of the load to be lifted and all LHE and rigging components that add to the weight. The manufacturer's maximum load limits for the entire range of the lift, as listed in the load charts, must also be specified;
- (3) The plan must specify the lift geometry and procedures, including the LHE position, height of the lift, the load radius, and the boom length and angle, for the entire range of the lift;
- (4) Site drawing must be included to identify placement/location(s) of LHE, adjacent equipment and/or facilities, etc;
- (5) The plan must designate the operator, lift supervisor and rigger and include their qualifications;
- (6) The plan will include a rigging plan that shows the lift points and describes rigging procedures and hardware requirements;
- (7) The plan will describe the ground conditions, outrigger or crawler track requirements, and, if necessary, the design of mats, necessary to achieve a level, stable foundation of sufficient bearing capacity for the lift;
- (8) For floating LHE, the plan must describe the operating base (platform) condition and any potential maximum list / trim;
- (9) The plan will list environmental conditions under which lift operations are to be stopped;
- (10) The plan will specify coordination and communication requirements for the lift operation;
- (11) For tandem LHE lifts, identify the requirements for an equalizer beam if applicable.
Knowledge Check Choose the best answer for the question.
16-13. Lifts made when the load weight is _____ of the LHE load chart or more are considered critical lifts for most equipment.
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