Key Takeaways
- Bull rigging uses chain falls, come-alongs, rollers, jacks, and gantries to move heavy loads in locations where a crane cannot reach.
- Every bull rigging operation requires a written rigging plan that covers load weight, center of gravity, path of travel, anchor point verification, and communication protocols.
- The weakest component in the rigging system determines the entire system’s working load limit, and no component should ever be loaded beyond its rated capacity.
- OSHA does not mandate a specific bull rigging certification, but employers must ensure riggers are qualified under OSHA 29 CFR 1926.251.
- Formal rigging training and NCCCO rigger certification give bull riggers the planning, inspection, and capacity calculation skills that prevent the most common rigging injuries.
What Is Bull Rigging?
Bull rigging is the practice of lifting, moving, and positioning heavy loads using mechanical devices other than cranes. When a mobile crane or overhead crane cannot physically reach a load, a bull rigger uses chain falls, come-alongs, rollers, skids, jacks, gantries, and winches to get the job done. The work is common in plant maintenance shutdowns, confined mechanical rooms, indoor equipment installations, and any location where rigging without a crane is the only practical option.
American Crane & Safety provides Rigging Courses and on-site training that cover the rigging principles, capacity calculations, and inspection practices that bull riggers need on the job every day.
This article covers the equipment, planning process, capacity rules, common hazards, applicable standards, and training paths for bull rigging operations.
How Bull Rigging Differs from Crane-Based Rigging
In standard crane rigging, the crane provides the primary lifting force. The rigger selects slings, shackles, and hitches, but the crane does the heavy work.
Bull rigging removes the crane from the equation. The rigger assembles a custom arrangement of multiple mechanical devices to create the lifting, pulling, or sliding forces needed to move the load from point A to point B. Each move is unique. The rigger must evaluate the environment, select the right combination of equipment, verify every anchor point, and coordinate the sequence of pulls and lifts.
Bull rigging is typically used in these scenarios:
- Confined spaces: Narrow openings, tight corridors, or rooms with restricted access.
- Low headroom: Ceilings or structures too low for a crane boom or overhead trolley.
- Indoor plant moves: Moving compressors, pumps, heat exchangers, or other heavy equipment inside operating facilities.
- Last-mile placement: Positioning a load after a crane has set it down as close as possible to the final location.
- Precision positioning: Aligning multiton industrial machinery to exact coordinates.
Bull Rigging Equipment
The table below summarizes the primary equipment used in bull rigging operations, along with direction of force and the governing standard for each.
| Equipment | Primary Use | Direction of Force | Governing Standard |
|---|---|---|---|
| Chain fall (manual chain hoist) | Vertical lifting, precise placement | Vertical (in-line only) | ASME B30.16-2022 |
| Come-along (lever hoist) | Pulling, tensioning, dragging | Any direction | ASME B30.21-2025 |
| Rollers, casters, skates | Horizontal transport on flat surfaces | Horizontal | Manufacturer specs |
| Hydraulic jack | Vertical lifting (short stroke) | Vertical | Manufacturer specs |
| Portable gantry | Overhead suspension for chain hoists | Vertical | ASME B30.16-2022 |
| Winch or tirfor (grip-action hoist) | Long-distance horizontal pulling | Horizontal or angled | Manufacturer specs |
| Snatch block | Redirect pull direction or gain mechanical advantage | Variable | Manufacturer specs |
Key Distinctions Between Chain Falls and Come-Alongs
Chain falls are for lifting. Come-alongs are for pulling. Do not substitute one for the other.
- A chain fall suspends a load vertically and can hold it stationary at any point. The upper and lower hooks must remain in a straight vertical line. Side-loading a chain fall is prohibited under ASME B30.16.
- A come-along (lever hoist) applies force through a ratcheting lever and can work vertically, horizontally, or at an angle. Under ASME B30.21-2025, lever hoists must be operated by one person’s hand power only. No lever extensions or cheater bars are permitted. If a come-along requires a cheater bar or a second worker to move the load, the unit is undersized for the job. Replace it with a higher-capacity lever hoist.
Common Bull Rigging Techniques
Bull rigging techniques vary by site conditions and load characteristics. The most common methods include the following.
Drifting
One chain fall suspends the load vertically from an overhead anchor. A second chain fall or come-along attaches to a separate anchor and pulls the load horizontally toward the desired position. This technique moves loads laterally when overhead travel is not available.
Skidding and Skating
The load is placed on rollers, casters, or skates. A come-along or winch provides the horizontal pulling force. This method is effective for moving heavy equipment across flat floors with minimal friction.
Jacking and Cribbing
Hydraulic jacks lift the load a few inches at a time. Cribbing (stacked timbers or steel shims) is placed under the load at each increment to prevent it from dropping if a jack fails. Lift heights per stroke are typically eight inches or less.
Multi-Point Chain Fall Lifts
Multiple chain falls attach to separate overhead anchor points and connect to the load at calculated pick points. This distributes the load across several anchors and allows controlled vertical movement in spaces where a single-point pick is not possible.
Load Turning and Rotation
Combinations of chain falls pulling in opposing directions rotate a load to the required orientation. This technique requires careful planning to avoid uncontrolled swinging.
Building a Bull Rigging Plan
Every bull rigging operation needs a written plan before any equipment is rigged. Skipping the plan is the fastest path to an overloaded anchor, a dropped load, or a crushed hand.
A complete bull rigging plan covers these elements:
- Load weight: Determine the exact weight of the load, including all rigging hardware attached to it. If the weight is unknown, weigh it or obtain certified weight documentation from the manufacturer.
- Center of gravity: Identify the center of gravity in all three axes. If the pick points are not directly above the center of gravity, the load will tilt.
- Path of travel: Map the entire route from origin to final placement. Note floor load ratings, overhead clearances, obstacles, pinch points, and any areas where personnel must be excluded.
- Equipment selection: Select every piece of rigging equipment based on the load requirements. Verify that the working load limit (WLL) of each component meets or exceeds the calculated forces for that component’s role in the move.
- Anchor point evaluation: Verify the structural capacity of every anchor point before attaching rigging. This step is covered in detail in the next section.
- Communication plan: Establish hand signals and verbal commands before starting. Designate who gives signals and who operates each piece of equipment.
- Competent person assignment: Designate a competent person to oversee the entire operation. This person must have the authority to stop work if conditions change.
For a field-ready reference to sling capacities, hitch configurations, and hand signals, download the American Crane & Safety Rigging Pocket Guide (English) or Rigging Pocket Guide (Spanish).
Anchor Point Checks
Anchor points bear the full force of the load plus any dynamic forces generated during the move. A failed anchor point drops the load.
Before attaching rigging to any anchor, verify the following:
- Structural capacity: A qualified person must confirm that the structural member (beam, column, embedded plate) can support the applied load. Do not assume a beam is adequate based on appearance.
- Attachment method: Beam clamps, shackles, and slings used to connect to the anchor must be rated for the load. Every connection point is part of the system and must meet or exceed the required capacity.
- Straight-line loading on chain hoists: Chain falls must hang so the upper and lower hooks are vertically aligned. Any side-loading on a chain hoist creates forces the hoist is not designed to handle and can cause the hoist or anchor to fail.
- No shared anchors without engineering review: If two or more rigging devices share a single anchor point, the combined load on that anchor must be calculated and verified.
OSHA 29 CFR 1926.251 requires that all rigging equipment for material handling be inspected each day before use by a competent person. This includes every chain fall, come-along, sling, shackle, and anchor attachment in the bull rigging setup.
Capacity Rules for Bull Rigging
Capacity errors cause the majority of rigging failures. These rules apply to every bull rigging operation.
The Weakest-Link Principle
The overall capacity of the rigging system equals the rated capacity of the weakest component. A 10-ton chain fall rigged with a 5-ton shackle gives you a 5-ton system, not a 10-ton system.
Sling Angle Effects
As the angle between a sling leg and the horizontal decreases, tension on the sling increases. At a 30-degree angle from horizontal, each sling leg carries twice the vertical load it would carry at 90 degrees. Always calculate sling tension based on the actual angle, not the vertical load alone.
No Cheater Bars, No Lever Extensions
If a come-along requires a pipe extension on the lever handle to move the load, that unit does not have enough capacity. ASME B30.21-2025 prohibits lever extensions. Replace the come-along with a higher-rated unit.
Static Ratings vs. Dynamic Forces
Manufacturer WLL ratings assume static, controlled loading. Dynamic forces from sudden starts, stops, or swinging loads increase the actual forces on the equipment and anchors. Account for dynamic loading in your rigging plan. Shock loading (a sudden jolt or drop) can instantly exceed the WLL of otherwise adequate equipment.
Pre-Use Inspection
Inspect every component before each use. Look for elongated chain links, cracked hooks, deformed latches, worn pawls, frayed wire rope, and any signs of previous overloading. Remove damaged equipment from service immediately.
Common Bull Rigging Injuries and How to Prevent Them
Industry data indicates that approximately 80% of recorded rigging accidents are caused by human error. The most common bull rigging injuries fall into these categories.
Pinch Points and Crush Injuries
Hands, fingers, and feet get caught between moving loads and fixed structures. In confined bull rigging environments, clearances are tight and escape routes are limited.
Prevention: Identify pinch points during the planning phase. Use taglines to control load movement. Keep hands and body parts clear of the load path at all times.
Struck-By from Dropped or Shifting Loads
Loads that shift, tip, or fall strike nearby workers. This happens when the center of gravity is miscalculated, when rigging fails, or when cribbing is inadequate during jacking operations.
Prevention: Calculate center of gravity before rigging. Use proper cribbing at every jacking increment. Establish exclusion zones around the load.
Equipment Failure from Overloading
Chain falls, come-alongs, slings, and shackles loaded beyond their WLL can fail without warning. The failure mode is often sudden and catastrophic.
Prevention: Know the weight of the load. Calculate forces on every component. Apply the weakest-link principle. Never exceed rated capacity.
Poor Communication
Out-of-sync movements between multiple riggers operating separate chain falls or come-alongs cause loads to swing, shift, or drop.
Prevention: Assign one person to give all signals. Establish clear verbal commands or hand signals before starting. Stop work if communication breaks down.
Electrocution
Rigging equipment that contacts energized conductors creates a lethal electrical path. This hazard exists whenever bull rigging takes place near electrical panels, bus bars, or overhead power lines.
Prevention: De-energize and lock out electrical sources in the work area. Maintain safe clearance distances from energized conductors.
Applicable Standards and Regulations
Bull rigging operations fall under several OSHA regulations and ASME standards:
- OSHA 29 CFR 1926.251: Rigging equipment for material handling. Requires daily inspection by a competent person. Covers slings, shackles, hooks, and related hardware.
- ASME B30.16-2022: Overhead, underhung, and stationary hoists. Covers manual chain hoists (chain falls) used in bull rigging.
- ASME B30.21-2025: Lever hoists (come-alongs). Published February 10, 2025, with an effective date of February 10, 2026. This edition expanded training requirements for operators to include rigging the load, communication protocols, and a prohibition on lifting people with lever hoists.
- ASME B30.20: Below-the-hook lifting devices. Relevant when custom lifting attachments are part of the bull rigging setup.
OSHA does not mandate a specific certification for bull rigging. However, employers are responsible for ensuring that riggers are qualified. OSHA defines a qualified person as someone who holds a recognized certificate or has demonstrated ability through extensive knowledge, training, and experience.
Violations of OSHA rigging standards can result in significant penalties. OSHA adjusts penalty amounts annually. See the current schedule at OSHA’s penalties page.
Training for Bull Riggers
Formal rigging training builds the planning, inspection, and capacity calculation skills that prevent the injuries described above. Even experienced riggers benefit from structured courses that reinforce best practices and align with current ASME standards.
NCCCO Rigger Certification
The NCCCO rigger certification is the primary industry credential for riggers. It validates knowledge of load weight calculation, sling selection, hitch types, capacity charts, and rigging inspection. While OSHA does not require this specific certification, many employers and general contractors require it for project access.
American Crane & Safety offers an online NCCCO Prep Course that prepares candidates for the NCCCO Rigger Level 1 written and practical exams. Find state-specific availability at the rigger training and NCCCO prep by state page.
Rigging Courses from AMC&S
AMC&S delivers Rigging Courses in two formats:
- Online: Self-paced courses available through the online course catalog. Suitable for individual workers or crews who need scheduling flexibility.
- On-site: Instructor-led training at your facility. On-site courses allow hands-on practice with the equipment and conditions your crew actually works with. This format is especially effective for bull rigging instruction, where every job site presents different challenges.
For additional questions about course formats, delivery timelines, or group training options, visit the FAQ page or the About Us page to learn more about American Crane & Safety’s training approach.
Summary: Bull Rigging Requires Planning, Capacity Discipline, and Training
Bull rigging is skilled, high-stakes work. Every move depends on the rigger’s ability to evaluate the environment, select the right equipment, verify anchor points, calculate forces, and coordinate with the crew. The margin for error is small, especially in the confined, low-headroom conditions where bull rigging is most common.
Invest in formal rigging training for your crew. Build the habit of writing a rigging plan for every move, no matter how routine it seems. Inspect every component before every use. Follow the capacity rules without exception.
Browse the American Crane & Safety online course catalog or request on-site training to get your riggers trained on the principles that keep bull rigging operations safe and productive.
Frequently Asked Questions (FAQ)
What is the difference between bull rigging and crane rigging?
Crane rigging uses a mobile or overhead crane as the primary lifting device. Bull rigging moves loads using chain falls, come-alongs, jacks, rollers, gantries, and other mechanical devices in locations where a crane cannot access the load.
Does OSHA require a certification for bull rigging?
OSHA does not require a specific bull rigging certification. However, OSHA 29 CFR 1926.251 requires employers to ensure riggers are qualified and that all rigging equipment is inspected daily by a competent person.
What equipment is used in bull rigging?
Common bull rigging equipment includes chain falls (manual chain hoists), come-alongs (lever hoists), rollers and skates, hydraulic jacks, portable gantries, winches, and snatch blocks.
When should bull rigging be used instead of a crane?
Bull rigging is used when a crane cannot physically reach the load due to confined spaces, low headroom, tight corners, indoor restrictions, or when the cost of mobilizing a crane is not justified for the move.
Where can I get rigging training that covers bull rigging techniques?
American Crane & Safety offers Rigging Courses online and on-site, along with an online NCCCO Prep Course for NCCCO Rigger Level 1 that covers rigging principles applicable to bull rigging operations. Visit the online course catalog or request on-site training for your crew.