Operations & Safe Practices

Core · Domain: Operations & Safe Practices · ~28 min · OSHA 1926 Subpart CC + ASME B30.5-2025 (Authored & cited — pending SME review.)

1. Who is responsible for what

A safe lift is a chain of named responsibilities. The exam asks "whose job is that?" frequently — know the roles.

• Crane user — verifies the crane is fit for use before work (shift inspection done, post-assembly inspection done, owner's documentation provided) and verifies the crane has capacity for the planned lift in the planned configuration (§5-3.1.3.1.2).
• Site supervisor — prepares the area (level, sound surface, power-line proximity, slopes, utilities), provides traffic control, addresses adverse conditions: poor soil, wind, heavy rain, fog, extreme cold, lighting. Designates a qualified lift director (§5-3.1.3.2.1).
• Lift director — present during lifting; stops operations if alerted to an unsafe condition; appoints signalpersons; tells the operator the weight of each load and the pick/place locations; obtains the operator's verification that the weight does not exceed rated capacity (§5-3.1.3.2.2).
• Operator — runs the crane per the duties in §5-3.1.3.3. Critically: whenever the operator has doubt about safety, the operator shall stop crane functions in a controlled manner (§5-3.1.3.3; §5-3.1.3.3.1).
• Rigger — obtains load weight and approximate CG, selects/inspects rigging, ensures the load is balanced and stable, installs tag lines when needed (§5-3.1.3.4).
• Signalperson — confirms the signaling method, gives standard signals from the operator's directional perspective, maintains continuous communication, avoids signaling loads over people (§5-3.1.3.5).

The unifying rule: the operator and the lift director cross-check each other on weight versus capacity, and any single person can stop the lift. OSHA codifies that stop authority in 29 CFR 1926.1418.

2. Pre-lift sequence

ASME §5-3.2.4: planning shall be tailored to each operation and sufficient to manage the conditions and hazards present.

Work this sequence before the hook moves:

1. Confirm the crane is fit — shift inspection complete, function controls tested, open repairs disclosed to operator (§5-3.1.3.3.1(g),(m); §5-3.1.3.1.2(f)).
2. Establish load weight and CG. Rigger obtains them; lift director conveys weight; operator verifies against chart. When load weight is not accurately known, the person supervising the lift must ascertain the weight does not exceed the rating at the maximum radius it will be handled (§5-3.2.1.1(d)).
3. Confirm net capacity from the chart — apply all notes (§5-3.1.3.3.1(s),(t)).
4. Check ground — firm, level within 1%, cribbing sized correctly (§5-3.4.7; §5-3.2.1.5(j)).
5. Survey for power lines — 360° out to maximum reach (§5-3.4.5.1(h)).
6. Plan the swing and load path clear of obstructions; define the swing-radius hazard zone (§5-3.2.1.5(a)).
7. Confirm communications — radios tested, signalperson identified, signals agreed (§5-3.3).

3. Two-blocking and the anti-two-block device

Two-blocking — the lower load block contacts the boom-tip sheaves or upper block. The drum keeps pulling; the rope takes the full load against a hard stop. Result: rope parts or the boom tip tears off, load drops.

It is not only a "hoist-up" event. Booming down and telescoping out both close the gap between hook and tip without any hoist input. The ATB protects all three functions.

Anti-two-block (ATB) device — detects impending contact and automatically stops the function and/or warns the operator before the block reaches the sheaves (OSHA 1926.1416; §5-3.2.1.2(b)). OSHA prohibits two-blocking during operation (1926.1417).

When the ATB is inoperative (§5-3.2.1.2(b)(4)): the person supervising the lift shall establish procedures — such as assigning an additional signalperson — to furnish equivalent protection. Hard line: personnel shall not be lifted when two-block devices are not functioning properly.

4. Operator's duties at the controls

These are direct exam items from ASME §5-3.1.3.3.1:

• Test function controls that will be used and operate only if they respond properly (m).
• Operate smoothly and in a controlled manner under normal conditions (n).
• No distractions while operating the controls (l).
• Ensure all controls are in neutral / off and personnel are clear before energizing or starting the engine (k).
• Wear the seat belt during transit if equipped (q).
• Observe each outrigger during extension, setting, and retraction — or use a signalperson (r).
• Refuse the lift if any part of the load or crane would enter the prohibited zone of energized power lines (f).
• Do not operate when unfit — physically or mentally (j).
• Obey any stop or emergency signal at all times, from anyone (v).

5. Side loading — freely suspended loads only

A boom is designed to carry load vertically. Pull the load sideways — drag it across the ground, swing it to start it moving, use the crane to break loose a stuck load — and you put lateral force on the boom it was never designed for. Side loading buckles lattice booms, twists telescopic sections, and can tip the crane.

The rule: "Side loading of booms shall be limited to freely suspended loads. Cranes shall not be used for dragging loads sideways" (§5-3.2.1.5(d)). OSHA prohibits improper side loading in 1926.1417(g).

A freely suspended load hangs straight down from the hook with the rope plumb. The small, unavoidable amount of side load from gentle swing or wind is within scope. Dragging, pulling stuck piling, or "breaking loose" buried loads is prohibited.

6. Personnel under and near the load

Under the load: personnel shall not stand or pass under the hoist rope, reeving accessories, hooks, ball, load blocks, attaching devices, or a suspended load — except during load attachment/detachment, guidance/positioning, or assembly/disassembly (§5-3.2.1.3(c); §5-3.2.1.4(b); §5-3.2.1.5(e),(f)). OSHA's keeping-clear rule is 1926.1425 — it bars employees from the fall zone and requires loads to be routed to avoid personnel.

Swing radius: all persons must be clear of the swing radius of the counterweight before lifting (§5-3.2.1.5(a)(4)). OSHA 29 CFR 1926.1424 (work area control) requires the swing-radius hazard area to be barricaded.

7. Suspended loads — control and prohibited practices

Never leave the controls unattended with a load suspended (§5-3.2.1.5(g)). If you must leave: set the load down in a controlled manner, then shut down.

Prohibited under §5-3.2.1.5(d),(h),(i): side loading, landing on a structure that's not designed for it without engineering, traveling or swinging the load over personnel.

Holding a load in the air is not parking. Operators are not permitted to rest or leave while a load is suspended — the crane is occupied and controls must be attended.

8. When conditions change — the stop authority

Anyone on the job can call a stop. OSHA 29 CFR 1926.1418 gives every employee the authority to stop the lift if they believe it is unsafe. The operator shall obey any stop or emergency signal, from anyone, at any times (§5-3.1.3.3.1(v)).

Conditions that require stopping or reassessment: wind approaching limits, visible deterioration, unexpected out-of-level reading, load weight that looks off, communication failure, unclear signal.

9. Critical-lift / engineered lift planning

When does a lift require a written plan? Per §5-3.2.4 and OSHA 1926.1431 (personnel lifts always require a plan), most jurisdictions and employer programs also require written plans for lifts above a threshold percentage of rated capacity — often 75–90% — or for complex operations: tandem crane picks, lifts near power lines, lifts over occupied structures, blind picks, or picks where the load weight is uncertain.

The plan identifies: crane configuration, attachment points, load weight and CG, required capacity at each configuration used, pick and set positions, hazards and controls, who is in charge, communication plan.

Common traps

• Thinking only the operator can call a stop — anyone can (1926.1418).
• Leaving the controls with a load suspended.
• Using the crane to drag or free a stuck load (side loading).
• Two-blocking while telescoping or booming down — not just while hoisting up.
• Forgetting the lift director must convey the load weight and get the operator's capacity confirmation.

Now test yourself

→ Practice: Operations & Safe Practices — role responsibilities, pre-lift sequence, two-blocking scenarios, side loading, suspended load rules, stop authority.