EM385 Lifting Plan Requirements: USACE Crane Operations & Rigging Safety

A lifting plan is a detailed, written procedure that establishes how a specific lifting operation will be safely executed. The plan identifies the particular load that will be lifted including its weight, dimensions, and center of gravity, specifies the type of crane that will be used including its capacity and current certification status, identifies all rigging equipment that will be used to attach the load to the crane hook, establishes the sequence of operations from initial load preparation through final placement at the destination, identifies personnel roles and communication procedures, and establishes hazard controls and emergency procedures. EM385 requires lifting plans for all lifts exceeding specific weight thresholds established by the contractor or project manager, for lifts involving complex or unusual configurations where standard procedures may not apply, for lifts over occupied areas or near sensitive equipment, and for any lift where the lifting supervisor determines that a written plan would reduce risks. All personnel involved in the lifting operation must review the lifting plan to ensure they understand the procedure and their specific responsibilities, and this review must be documented through sign-offs by all involved parties before the lifting operation begins. The lifting plan must be retained on the project site during the lifting operation so that it can be referenced if questions arise during execution or if changes to the procedure become necessary. Upon completion of the lifting operation, the plan and documentation of the operation must be retained in project files for post-project review and potential use as reference material for similar future lifting operations.

Proper crane selection is the foundation of safe lifting operations because the selected crane must have sufficient capacity to safely lift the load while maintaining appropriate safety margins. The lifting plan must identify the type of crane that will be used, such as a mobile hydraulic crane, a truck-mounted boom crane, a tower crane, or a specialized heavy-lift device, and this selection must be justified based on the characteristics of the load and the configuration of the lifting operation. Crane capacity is established through manufacturer load charts that specify the maximum load that the crane can lift at various boom angles, load radii, and outrigger configurations. The lifting plan must specify all assumptions used in capacity calculations including the boom angle, the load radius measured from the crane centerline to the load center of gravity, the boom length, and the outrigger configuration. Environmental factors such as wind speed can reduce crane capacity because wind forces acting on the load or boom can reduce the net effective capacity. The lifting plan must establish a safety factor of at least five to one, meaning that the maximum load that will be lifted cannot exceed twenty percent of the crane's rated capacity at the specific configuration being used. This five-to-one safety factor provides a substantial margin to account for uncertainties in load weight, rigging equipment performance, and environmental factors. Crane certification is essential and must be verified before the lifting operation begins. The crane must have been inspected and certified by a qualified inspector within the required timeframe, typically annually for mobile cranes, and the certification documentation must be available for review. Load testing documentation may be required for critical lifting operations to verify that the crane is performing according to manufacturer specifications. Real-time load monitoring systems are sometimes used for heavy or complex lifts to provide immediate feedback on actual loads being experienced during the lifting operation, and this information can be valuable for verifying that operations are proceeding as planned.

Rigging equipment includes all the slings, shackles, spreader bars, lifting lugs, and other hardware used to attach loads to the crane hook and transfer the load to the crane. All rigging equipment must be specifically selected based on the load characteristics and must have load ratings that significantly exceed the maximum load that will be experienced during the lifting operation. Wire rope slings are commonly used for their strength and versatility and must be selected based on the wire diameter, construction type, and whether single or multiple legs will be used for the lift. Synthetic slings made from polyester or nylon fibers are lighter than wire rope and more comfortable for workers to handle but have different characteristics regarding temperature sensitivity and abrasion resistance. Chain slings provide excellent durability and are often used where slings must contact rough load surfaces that might damage other sling materials. Shackles are used to attach slings to crane hooks and must be properly sized with sufficient strength ratings for the loads they will support, and the shackle pins must be properly secured to prevent accidental disengagement. Spreader bars are used to distribute loads across multiple attachment points on the load surface and are essential when loads cannot be safely suspended from a single point or when sling geometry must be controlled to prevent the load from tipping. Lifting lugs are permanently or temporarily attached to loads to provide appropriate attachment points for rigging equipment, and these lugs must be structurally adequate for the loads they will support. Daily visual inspection of all rigging equipment is mandatory before use to identify any signs of damage, wear, or corrosion that might compromise strength or safety. Load rating tags must be clearly visible and legible on all rigging equipment so that workers can quickly verify that equipment has appropriate capacity for the intended load. Any rigging equipment showing signs of damage such as cracks, broken wires, deformation, or excessive corrosion must be immediately removed from service and cannot be used until it has been repaired by qualified personnel and re-certified. Proper storage procedures for rigging equipment between projects help extend service life and maintain safety by protecting equipment from environmental damage. Serial numbers and inspection records should be maintained for all critical rigging equipment to provide traceability and support maintenance decisions.

Accurate load weight calculations are absolutely essential for safe lifting because all equipment selection and capacity verification are based on the assumption that the calculated weight is correct. The lifting plan must specify the method used to determine load weight, and the most reliable method is actual weighing of the load on a certified scale before the lifting operation begins. When actual weighing is not practical, load weight must be calculated by identifying all components of the load including the primary material, packaging materials, containers, bracing, and other items that will be lifted, determining the weight of each component through reference to material density tables or manufacturer specifications, and summing these weights to obtain the total load weight. The calculated weight must include appropriate safety margins to account for uncertainties such as moisture content in materials that may have absorbed water or inaccuracies in density tables. Material density tables are available for most common construction materials such as steel, concrete, wood, and various metals, and these tables allow calculation of weight based on volume. The center of gravity must be determined for every load because this critical information determines how the load will be positioned when suspended from the crane hook and whether the load will remain balanced and stable during the lifting operation. For simple symmetrical loads, the center of gravity can be determined geometrically by identifying the mathematical center of the object. For complex or unsymmetrical loads, the center of gravity must be calculated by treating the load as multiple component parts, calculating the center of gravity of each component, and then calculating the combined center of gravity. Unbalanced loads present serious safety hazards because the load may tip or rotate during the lifting operation, possibly causing the load to slip from the slings or causing unexpected movements that could damage the load or adjacent structures. When loads cannot be suspended from their center of gravity through conventional rigging methods, special rigging techniques such as spreading the attachment points or using spreader bars must be used to ensure stable suspension. Test lifts provide an opportunity to verify load balance and stability before the load is lifted to its full height. During a test lift, the load is slowly raised a few feet off the ground and held at that height while the lifting supervisor and all personnel observe to verify that the load is stable and balanced, there are no unexpected movements or tilting, rigging equipment is functioning properly, and the crane is performing as expected.

A complete lifting plan contains numerous specific elements that must be thoroughly documented and communicated to all participating personnel. The load identification section describes the load in sufficient detail that all personnel understand exactly what is being lifted, including dimensions, general description of the load contents, and the calculated or measured weight. The lifting location section identifies where the load will be picked up, the route it will travel during the lifting operation, and where it will be set down at the destination, including consideration of any obstacles or hazards along the route. The crane specification section documents the specific crane that will be used, including the crane type and model, its rated capacity, the manufacturer certification and inspection documentation, the specific boom configuration and length, and the specific outrigger configuration that will be used. The rigging equipment section identifies all slings, shackles, and other hardware that will be used, including the type, size, and rated capacity of each piece of equipment, and the condition of the equipment as verified through inspection. The load calculations section provides the detailed calculations used to determine load weight and center of gravity, including assumptions made, materials and sources used, and verification that the load weight is less than the crane capacity with the five-to-one safety factor applied. The lift procedure section describes the step-by-step sequence of operations that will be performed, starting with initial positioning of the crane, attaching rigging equipment, performing the test lift, raising and positioning the load, traveling to the destination if a mobile crane is being used, positioning the load at the destination, and finally disengaging the rigging equipment. The personnel assignments section identifies the specific individuals who will fill critical roles including the crane operator, the head rigger who supervises rigging personnel, the lifting supervisor who has overall authority for the operation, ground spotters positioned to observe the load and surrounding area, and any safety personnel who will be present. The weather limitations section specifies restrictions such as maximum wind speeds at which the operation can proceed, temperature limitations if environmental conditions could affect equipment performance, visibility requirements for safe operation, and procedures for halting operations if weather conditions exceed the specified limits. The hazard assessment section identifies specific hazards present at the project such as power lines near the lifting area, other equipment or structures that the load might contact, underground utilities or subsurface features, occupied areas near the lifting operation, and personnel exclusion zones that must be established to keep workers away from the lifting operation. The environmental conditions section addresses ground bearing capacity if the crane will be supported on temporary surfaces, surface preparation and verification that adequate support exists, potential instability issues, and any erosion or settlement risks. The emergency procedures section establishes how to respond if equipment fails during the lift, what to do if the load begins to slip from the slings, how to safely abort the operation if something goes wrong, and how to safely lower the load to the ground if the crane must be shut down for any reason. The approval signatures section requires sign-offs by the project manager or safety officer who approves the plan, all personnel who will participate in the lifting operation, and any other required personnel.

Safe execution of lifting operations depends on having qualified personnel in critical roles who understand their responsibilities and have the experience and training necessary to safely perform their duties. The crane operator must hold appropriate licensing or certification depending on the crane type and the requirements established by the project, the state, or the contractor. Many lifting operations require operators to hold certification from the National Commission for the Certification of Crane Operators, though some projects accept manufacturer certifications or state-issued licenses. The crane operator must have extensive experience operating the specific type of equipment being used and must understand the capabilities and limitations of that equipment. Riggers are responsible for preparing the load, selecting and attaching rigging equipment, positioning slings and spreader bars, and executing the actual connection of the load to the crane hook. Riggers must be trained in proper rigging methods, must understand load calculations and center of gravity concepts, and must have experience with the types of loads they will be rigging. The lifting supervisor is the individual who has overall authority for the lifting operation and who has the responsibility and authority to halt the operation if unsafe conditions are observed. The lifting supervisor must review the lifting plan, ensure that all personnel understand the plan and their roles, direct the execution of the plan, continuously monitor the operation for any hazards or deviations from the plan, and make decisions about whether to continue or halt operations based on the conditions being observed. Ground spotters are positioned at strategic locations to observe the load and surrounding area and to alert the crane operator and lifting supervisor to any hazards, obstacles, or unusual conditions. Safety personnel such as the Site Safety Officer should be present during all lifting operations to observe compliance with safety procedures and to ensure that the operation proceeds safely. Operator qualification must be verified through review of certification documents before the lifting operation is permitted to begin, and the contractor must maintain records showing that all operators possess current, valid certifications. Training documentation for all rigging and lifting personnel must be maintained showing that they have received appropriate training in their specific roles. Communication procedures must be clearly established before the operation begins so that all personnel understand how to communicate with each other, whether through hand signals or radio communications, and what specific signals or communications mean. The lifting supervisor must maintain absolute authority to halt operations at any time if unsafe conditions are observed or if operations deviate from the lifting plan. Continuing education and periodic refresher training help maintain the skills and knowledge of lifting personnel and should be required at regular intervals to keep certifications current.

Safe execution of lifting operations requires strict adherence to established procedures and continuous attention to safety during all phases of the operation. A pre-lift briefing must be held with all personnel who will participate in the lifting operation to review the lifting plan, discuss each person's role and responsibilities, verify that all personnel understand the plan and the communication procedures, and address any questions or concerns. Final equipment inspection must be performed immediately before the operation begins, with the crane operator verifying that the crane is mechanically sound and all controls are functioning properly, riggers verifying that all rigging equipment is in good condition and properly attached, and the lifting supervisor verifying that the overall setup meets the requirements established in the lifting plan. Area clearance and personnel exclusion zones must be established and enforced before the operation begins, with all unnecessary personnel removed from the area around the lifting operation and marked barriers or ropes placed to prevent workers from entering the exclusion zone. Standard communication signals must be established so that all personnel know what each hand signal or radio communication means, and rigorous adherence to these signals must be maintained throughout the operation to prevent misunderstandings that could lead to accidents. A test lift in which the load is raised a few feet and held in that position provides an opportunity to verify that the load is properly balanced, rigging equipment is functioning correctly, the crane is performing as expected, and no unexpected conditions have been encountered. During the test lift, all personnel carefully observe the load, slings, and surrounding area to identify any problems before the load is lifted higher. Continuous supervision by the lifting supervisor must be maintained throughout the operation, with the supervisor maintaining visual contact with the load, the crane, and all participating personnel at all times. Communication between the crane operator and the lifting supervisor must be continuous during the operation, with the supervisor directing the crane operator's actions and providing feedback about load position, surrounding hazards, and any conditions that might affect safety. Hazard monitoring must continue throughout the operation as personnel watch for obstacles that the load might contact, other equipment or personnel that might interfere with the operation, wind gusts that might move the load, or any other factors that could affect safety. Smooth operation requires that the crane operator execute smooth, controlled movements without jerky or abrupt movements that could cause the load to swing or create shock loads on rigging equipment. Load stability must be continuously observed to ensure that the load remains level and does not tip or rotate unexpectedly during the lifting operation. Precise positioning of the load at the set-down location requires careful coordination between the crane operator and spotters who can see the load and guide it into the correct position. Final verification that the load is secure and stable must be performed before the crane disengages from the load, and this verification might include checking that the load is resting solidly on its support points and that rigging equipment can be safely disengaged. Documentation of the lifting operation must be recorded including the date and time of the operation, the personnel involved, the load lifted, the crane used, and any incidents or unusual conditions encountered.

Environmental conditions significantly impact the safety and feasibility of lifting operations because weather and site conditions create hazards that must be assessed and controlled. Wind speed is perhaps the most critical environmental factor affecting lifting safety because wind forces acting on the load, the rigging, and the crane boom can reduce the effective capacity and create unpredictable movements of the load. Lifting plans typically establish maximum wind speed limits at which operations can safely proceed, often in the range of twenty to thirty miles per hour depending on the size and configuration of the load. Weather monitoring must be continuous during lifting operations to assess whether wind speeds exceed established limits or whether weather conditions are changing such that operations should be halted or suspended. Lightning and electrical storms present serious hazards during lifting operations because cranes and rigging equipment can attract lightning, and operations must be suspended immediately when electrical storms approach. Temperature extremes can affect both equipment performance and worker safety, with cold temperatures potentially affecting the properties of slings and rigging equipment and extreme heat potentially affecting equipment lubrication and worker endurance. Ground conditions and bearing capacity must be verified before the operation begins if a mobile crane will be positioned on the ground, as soft soil or inadequate bearing capacity can cause the crane to sink or tip. Surface preparation might include placement of blocking or crane mats to distribute the crane weight and provide stable support. Visibility must be adequate for the operation to proceed safely, which means sufficient natural or artificial lighting must be available for the crane operator to see the load and for spotters to observe the operation. Power line clearance is critical to prevent accidental electrical contact, and a minimum clearance of ten feet must be maintained between any part of the crane, load, or rigging and all power lines. Precipitation such as rain or snow affects rigging safety by making slings slippery and potentially affecting load stability, and operations might need to be suspended during precipitation. Icing conditions require special precautions because ice forming on rigging equipment, loads, or the crane boom can add significant weight and affect load stability. Seasonal adjustments to procedures might be necessary for winter operations to address snow accumulation, reduced visibility, or other winter-specific hazards.

USACE maintains strong oversight of lifting operations on construction projects through inspection of lifting plans and observation of actual lifting operations to ensure compliance with safety requirements. Lifting plans must be reviewed and approved by USACE representatives before the lifting operation begins, and any deficiencies or concerns must be addressed before work can proceed. Inspectors observe lifting operations to verify that procedures are being followed as documented in the lifting plan, that all personnel are performing their assigned roles properly, that equipment is functioning as expected, and that no unsafe conditions are developing during the operation. Compliance verification by inspectors includes checking that all required safety procedures are being followed, that personnel are properly positioned, that communication procedures are being maintained, and that the lifting supervisor maintains appropriate supervision and authority. Violations of lifting procedures are documented through deficiency reports that identify specific violations, explain the safety concerns created by the violations, and specify the timeframe within which the contractor must take corrective action. Work stoppage authority allows USACE inspectors to immediately halt any lifting operation that they determine to be unsafe, and operations cannot resume until the unsafe condition is corrected and USACE authorizes continuation. For serious accidents involving injury or significant property damage, USACE participates in accident investigations to determine root causes and identify systemic improvements to prevent similar incidents. Records of lifting operations including the lifting plan, personnel sign-offs, documentation of the operation, and any incident reports must be retained in project files for the required timeframe and must be available for review by USACE auditors or during post-project reviews.